Plastic to Brass/alum fitting sealer?

[Dave-Sandra]

Wayne ,
A local fellow here in Terrace BC uses a plastic welding process ( uses heat
and a filler rod )to repair plastic tanks and to attach fittings that he
gets from his supplier. I can find out more if you are interested

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:31 PM
To: murphy-rebel@dcsol.com
Subject: Plastic to Brass/alum fitting sealer?


My turn to ask a question from all you well rounded knowledgeable people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!) that
has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping or
weeping. Have tried numerous sealers over the last year + and even the fuel
proof stuff seems to let go with his Esso premium car gas. Seal All, Goop,
Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my hands
up in case someone has a better solution as I'm not sure if Proseal is going
to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings are
plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca





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[Dave-Sandra]

Wayne , I'll try to get ahold of him tonite but it will probably be tomorrow
morning as it is after five pm now

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:51 PM
To: murphy-rebel@dcsol.com
Subject: Re: Plastic to Brass/alum fitting sealer?


Dave, If you don't mind looking into it for me I'd much appreciate if there
is a secret to this for leak free fittings. Hate to rush free advise but
time is a waste'n, as I have to have this thing ready to go back in the air
for next Friday and if I go the Proseal route I need a week for that to
cure.

Thanks,
Wayne

----- Original Message -----
From: "Dave-Sandra" <dave-sandra@monarch.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, May 20, 2003 7:47 PM
Subject: RE: Plastic to Brass/alum fitting sealer?

Wayne ,
A local fellow here in Terrace BC uses a plastic welding process ( uses

heat

and a filler rod )to repair plastic tanks and to attach fittings that he
gets from his supplier. I can find out more if you are interested

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:31 PM
To: murphy-rebel@dcsol.com
Subject: Plastic to Brass/alum fitting sealer?


My turn to ask a question from all you well rounded knowledgeable people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!)

that

has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping

or

weeping. Have tried numerous sealers over the last year + and even the

fuel

proof stuff seems to let go with his Esso premium car gas. Seal All, Goop,
Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my

hands

up in case someone has a better solution as I'm not sure if Proseal is

going

to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings are
plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[Wayne G. O'Shea]

My turn to ask a question from all you well rounded knowledgeable people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!) that
has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping or
weeping. Have tried numerous sealers over the last year + and even the fuel
proof stuff seems to let go with his Esso premium car gas. Seal All, Goop,
Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my hands
up in case someone has a better solution as I'm not sure if Proseal is going
to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings are
plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca





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[Wayne G. O'Shea]

Dave, If you don't mind looking into it for me I'd much appreciate if there
is a secret to this for leak free fittings. Hate to rush free advise but
time is a waste'n, as I have to have this thing ready to go back in the air
for next Friday and if I go the Proseal route I need a week for that to
cure.

Thanks,
Wayne

----- Original Message -----
From: "Dave-Sandra" <dave-sandra@monarch.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, May 20, 2003 7:47 PM
Subject: RE: Plastic to Brass/alum fitting sealer?

Wayne ,
A local fellow here in Terrace BC uses a plastic welding process ( uses

heat

and a filler rod )to repair plastic tanks and to attach fittings that he
gets from his supplier. I can find out more if you are interested

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:31 PM
To: murphy-rebel@dcsol.com
Subject: Plastic to Brass/alum fitting sealer?


My turn to ask a question from all you well rounded knowledgeable people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!)

that

has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping

or

weeping. Have tried numerous sealers over the last year + and even the

fuel

proof stuff seems to let go with his Esso premium car gas. Seal All, Goop,
Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my

hands

up in case someone has a better solution as I'm not sure if Proseal is

going

to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings are
plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[Wayne G. O'Shea]

Okay, thanks!!

I have to go into our plastics plant (that makes you wonder aye! - that I
can't seal stuff to it!!) to do the payroll in the morning, so it will be
LATE afternoon before I will be attempting anything so hopefully you can
send me anything you learn before then.

Thanks again,
Wayne

----- Original Message -----
From: "Dave-Sandra" <dave-sandra@monarch.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, May 20, 2003 8:03 PM
Subject: RE: Plastic to Brass/alum fitting sealer?

Wayne , I'll try to get ahold of him tonite but it will probably be

tomorrow

morning as it is after five pm now

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:51 PM
To: murphy-rebel@dcsol.com
Subject: Re: Plastic to Brass/alum fitting sealer?


Dave, If you don't mind looking into it for me I'd much appreciate if

there

is a secret to this for leak free fittings. Hate to rush free advise but
time is a waste'n, as I have to have this thing ready to go back in the

air

for next Friday and if I go the Proseal route I need a week for that to
cure.

Thanks,
Wayne

----- Original Message -----
From: "Dave-Sandra" <dave-sandra@monarch.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, May 20, 2003 7:47 PM
Subject: RE: Plastic to Brass/alum fitting sealer?

Wayne ,
A local fellow here in Terrace BC uses a plastic welding process ( uses

heat

and a filler rod )to repair plastic tanks and to attach fittings that he
gets from his supplier. I can find out more if you are interested

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:31 PM
To: murphy-rebel@dcsol.com
Subject: Plastic to Brass/alum fitting sealer?


My turn to ask a question from all you well rounded knowledgeable

people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!)

that

has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping

or

weeping. Have tried numerous sealers over the last year + and even the

fuel

proof stuff seems to let go with his Esso premium car gas. Seal All,

Goop,

Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my

hands

up in case someone has a better solution as I'm not sure if Proseal is

going

to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings

are

plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[Wayne G. O'Shea]

Okay, thanks!!

I have to go into our plastics plant (that makes you wonder aye! - that I
can't seal stuff to it!!) to do the payroll in the morning, so it will be
LATE afternoon before I will be attempting anything so hopefully you can
send me anything you learn before then.

Thanks again,
Wayne

----- Original Message -----
From: "Dave-Sandra" <dave-sandra@monarch.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, May 20, 2003 8:03 PM
Subject: RE: Plastic to Brass/alum fitting sealer?

Wayne , I'll try to get ahold of him tonite but it will probably be

tomorrow

morning as it is after five pm now

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:51 PM
To: murphy-rebel@dcsol.com
Subject: Re: Plastic to Brass/alum fitting sealer?


Dave, If you don't mind looking into it for me I'd much appreciate if

there

is a secret to this for leak free fittings. Hate to rush free advise but
time is a waste'n, as I have to have this thing ready to go back in the

air

for next Friday and if I go the Proseal route I need a week for that to
cure.

Thanks,
Wayne

----- Original Message -----
From: "Dave-Sandra" <dave-sandra@monarch.net>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, May 20, 2003 7:47 PM
Subject: RE: Plastic to Brass/alum fitting sealer?

Wayne ,
A local fellow here in Terrace BC uses a plastic welding process

uses

heat

and a filler rod )to repair plastic tanks and to attach fittings that

he

gets from his supplier. I can find out more if you are interested

Dave Bjorkman
(future Moose Builder and avid forum lurker )

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Tuesday, May 20, 2003 4:31 PM
To: murphy-rebel@dcsol.com
Subject: Plastic to Brass/alum fitting sealer?


My turn to ask a question from all you well rounded knowledgeable

people!

Having a problem with a customers Pegastol (read shitbox from

K'beck!!)

that

has terrible rotomoulded plastic wing & main tanks. It's been an

ongoing

battle to try and seal his outlets and drains to keep them from

dripping

or

weeping. Have tried numerous sealers over the last year + and even the

fuel

proof stuff seems to let go with his Esso premium car gas. Seal All,

Goop,

Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my

hands

up in case someone has a better solution as I'm not sure if Proseal is

going

to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings

are

plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[LisaFly99]

In a message dated 5/20/03 9:18:39 PM Central Daylight Time,
oifa@irishfield.on.ca writes:

Wayne ,

uses

heat

he

WAYNE
I have a plastic welder I bought from Harbor Freight. Auto body shops and
used car dealers use them to repair the plastic body parts, bumper covers,
ground effect panels ects. Using it is an art in itself. First make sure you
have the right rod for the material. And practice a lot before you do
anything important. You can burn through right now if you aren't careful. And
a thumbs up for Dave's friend in BC for being proficient at it, because it's
not as easy as it looks.
PS. make sure the air is on before you plug one in because they burn up in
about one second if there's no air flowing through the system. Don't ask how
I know, it's kind of self explanatory.
Phil&Lisa Smith
#460R
N414D



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[Dave-Sandra]

Wayne I talked to my friend here in Terrace and he told me thatit is
possible to weld a flange/bushing on to the PE tanks . Problem is that
unless you have the proper flange and filler rod and similar materials to
practice on then you are better off trying to seal a bulkhead fitting . I
kind of like the Devcon idea I have used it to seal leaks on high voltage
transfomers containing mineral oil with good sucess.Although like David
Ricker I am not sure of its compatability with PE.
Sorry I couln't be of more help.
Another thought do you
have any local PE water tank or septic tank supliers could be they know
someone who is good at plastic welding .Good luck!!!!!

Dave Bjorkman
(future Moose Builder and avid forum lurker )
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Wednesday, May 21, 2003 4:53 PM
To: murphy-rebel@dcsol.com
Subject: Re: Plastic to Brass/alum fitting sealer?


Thanks Dave!

I'm going to tackle it somehow tomorrow and if they still leak I'm going to
rip the tank lids off the wings and build him some real aluminum tanks out
of my own "pocket"....... as in the long run it will cost me less!!

Thanks again everyone,
Wayne

----- Original Message -----
From: "David Ricker" <ricker@dbis.ns.ca>
To: <murphy-rebel@dcsol.com>
Sent: Wednesday, May 21, 2003 7:48 PM
Subject: Re: Plastic to Brass/alum fitting sealer?

Wayne

I don't know about being knowledgable but I might as well toss out a few

ideas

in case it makes someone think of a solution.

On the adhesives I'm not sure if there is anything that will stick to PE

very

well but here are a couple of ideas. Given any though to hot melt

adhesives? I

don't know of any particular one but there might be a formulation that

would

take to the PE tanks. Give your local industrial adhesive rep. a call &

see if

you can get a sample & a gun to apply it. I was looking at using one of

the

"Engineering" grades on a project a while back and the rep for Amisol (?)

was

helpful.

Another idea would be one of the castable polyurethanes like Devcon

Flexane 80.

Cast it around the leaky fitting in a bump covering it and spreading out

around

the fitting. We used to make isolation mounts for electronic enclosures

which

were immersed in mineral & silicone oils and that worked well in that
application. After cure it is about 80 durometer so it can flex with the

tank

if need be. We cast right to the aluminum but I can't say how it would

adhere

to the PE, maybe the Devcon rep can answer that.

You might want to try and put a bulkhead fitting in the tank and use that

as a

via for the fuel line (see US Plastics, usplastic.com, P/N 16421 or

similar)

they use a gasket which is compressed against the side of the tank.

Outside of that, the plastic welding sounds like as good an ideas as any

(except

maybe an aircraft bladder....), perhaps you could weld some robust flanges

on

where the tubes have to pass through and thread fittings into the flange.

US Plastics sell the plastic welding guns (like P/N 41066) and a how to

booklet

(I have it, seems to make sense). They say you need nitrogen to weld PE

though.

Well hope this is useful, be nice to be able to help you for a change!

Cheers,

Dave R.

"Wayne G. O'Shea" wrote:

My turn to ask a question from all you well rounded knowledgeable

people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!)

that

has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping

or

weeping. Have tried numerous sealers over the last year + and even the

fuel

proof stuff seems to let go with his Esso premium car gas. Seal All,

Goop,

Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my

hands

up in case someone has a better solution as I'm not sure if Proseal is

going

to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings

are

plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[Mike Davis]

This may seem like a bailing wire fix, but I thought I'd share it anyway. I
bought a snow machine 3 years ago with a split/leaking plastic fuel tank...
I took a wire brush to the crack to rough things up, then worked 30 minute
epoxy into the crack and spread it out on the surrounding "roughed up" area.
3 years later and many hours of bouncing down the trails at -30F, and it's
still holding.

Sounds to simple... but if it works, why not!

Mike

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <murphy-rebel@dcsol.com>
Sent: Wednesday, May 21, 2003 3:53 PM
Subject: Re: Plastic to Brass/alum fitting sealer?

Thanks Dave!

I'm going to tackle it somehow tomorrow and if they still leak I'm going

to

rip the tank lids off the wings and build him some real aluminum tanks out
of my own "pocket"....... as in the long run it will cost me less!!

Thanks again everyone,
Wayne

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[Wayne G. O'Shea]

Thanks Dave!

I'm going to tackle it somehow tomorrow and if they still leak I'm going to
rip the tank lids off the wings and build him some real aluminum tanks out
of my own "pocket"....... as in the long run it will cost me less!!

Thanks again everyone,
Wayne

----- Original Message -----
From: "David Ricker" <ricker@dbis.ns.ca>
To: <murphy-rebel@dcsol.com>
Sent: Wednesday, May 21, 2003 7:48 PM
Subject: Re: Plastic to Brass/alum fitting sealer?

Wayne

I don't know about being knowledgable but I might as well toss out a few

ideas

in case it makes someone think of a solution.

On the adhesives I'm not sure if there is anything that will stick to PE

very

well but here are a couple of ideas. Given any though to hot melt

adhesives? I

don't know of any particular one but there might be a formulation that

would

take to the PE tanks. Give your local industrial adhesive rep. a call &

see if

you can get a sample & a gun to apply it. I was looking at using one of

the

"Engineering" grades on a project a while back and the rep for Amisol (?)

was

helpful.

Another idea would be one of the castable polyurethanes like Devcon

Flexane 80.

Cast it around the leaky fitting in a bump covering it and spreading out

around

the fitting. We used to make isolation mounts for electronic enclosures

which

were immersed in mineral & silicone oils and that worked well in that
application. After cure it is about 80 durometer so it can flex with the

tank

if need be. We cast right to the aluminum but I can't say how it would

adhere

to the PE, maybe the Devcon rep can answer that.

You might want to try and put a bulkhead fitting in the tank and use that

as a

via for the fuel line (see US Plastics, usplastic.com, P/N 16421 or

similar)

they use a gasket which is compressed against the side of the tank.

Outside of that, the plastic welding sounds like as good an ideas as any

(except

maybe an aircraft bladder....), perhaps you could weld some robust flanges

on

where the tubes have to pass through and thread fittings into the flange.

US Plastics sell the plastic welding guns (like P/N 41066) and a how to

booklet

(I have it, seems to make sense). They say you need nitrogen to weld PE

though.

Well hope this is useful, be nice to be able to help you for a change!

Cheers,

Dave R.

"Wayne G. O'Shea" wrote:

My turn to ask a question from all you well rounded knowledgeable

people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!)

that

has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping

or

weeping. Have tried numerous sealers over the last year + and even the

fuel

proof stuff seems to let go with his Esso premium car gas. Seal All,

Goop,

Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my

hands

up in case someone has a better solution as I'm not sure if Proseal is

going

to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings

are

plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[Wayne G. O'Shea]

Thanks, the "poop" tank dealer brings thoughts of a chapter member! Will try
him tonight!

I already have a threaded reinforced area in the tank that on the last
attempt I drilled out and retapped to have clean 3/8NPT threads and it still
leaked, so just a matter of finding something that will hold back the fuel
flow.

Maybe a heavy lip of proseal (up inside the tank threaded area)before I
thread in the fitting, then coat the end of the fitting so they stick
together as well as coating the fitting, thread in, let cure and clean out
the drain area so fuel can get to the quick drain!

Thanks again,
Wayne

----- Original Message -----
From: "Dave-Sandra" <dave-sandra@monarch.net>
To: <murphy-rebel@dcsol.com>
Sent: Wednesday, May 21, 2003 8:36 PM
Subject: RE: Plastic to Brass/alum fitting sealer?

Wayne I talked to my friend here in Terrace and he told me thatit is
possible to weld a flange/bushing on to the PE tanks . Problem is that
unless you have the proper flange and filler rod and similar materials to
practice on then you are better off trying to seal a bulkhead fitting . I
kind of like the Devcon idea I have used it to seal leaks on high voltage
transfomers containing mineral oil with good sucess.Although like David
Ricker I am not sure of its compatability with PE.
Sorry I couln't be of more help.
Another thought do you
have any local PE water tank or septic tank supliers could be they know
someone who is good at plastic welding .Good luck!!!!!

Dave Bjorkman
(future Moose Builder and avid forum lurker )
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Wednesday, May 21, 2003 4:53 PM
To: murphy-rebel@dcsol.com
Subject: Re: Plastic to Brass/alum fitting sealer?


Thanks Dave!

I'm going to tackle it somehow tomorrow and if they still leak I'm going

to

rip the tank lids off the wings and build him some real aluminum tanks out
of my own "pocket"....... as in the long run it will cost me less!!

Thanks again everyone,
Wayne

----- Original Message -----
From: "David Ricker" <ricker@dbis.ns.ca>
To: <murphy-rebel@dcsol.com>
Sent: Wednesday, May 21, 2003 7:48 PM
Subject: Re: Plastic to Brass/alum fitting sealer?

Wayne

I don't know about being knowledgable but I might as well toss out a few

ideas

in case it makes someone think of a solution.

On the adhesives I'm not sure if there is anything that will stick to PE

very

well but here are a couple of ideas. Given any though to hot melt

adhesives? I

don't know of any particular one but there might be a formulation that

would

take to the PE tanks. Give your local industrial adhesive rep. a call &

see if

you can get a sample & a gun to apply it. I was looking at using one of

the

"Engineering" grades on a project a while back and the rep for Amisol

(?)

was

helpful.

Another idea would be one of the castable polyurethanes like Devcon

Flexane 80.

Cast it around the leaky fitting in a bump covering it and spreading out

around

the fitting. We used to make isolation mounts for electronic enclosures

which

were immersed in mineral & silicone oils and that worked well in that
application. After cure it is about 80 durometer so it can flex with

the

tank

if need be. We cast right to the aluminum but I can't say how it would

adhere

to the PE, maybe the Devcon rep can answer that.

You might want to try and put a bulkhead fitting in the tank and use

that

as a

via for the fuel line (see US Plastics, usplastic.com, P/N 16421 or

similar)

they use a gasket which is compressed against the side of the tank.

Outside of that, the plastic welding sounds like as good an ideas as any

(except

maybe an aircraft bladder....), perhaps you could weld some robust

flanges

on

where the tubes have to pass through and thread fittings into the

flange.

US Plastics sell the plastic welding guns (like P/N 41066) and a how to

booklet

(I have it, seems to make sense). They say you need nitrogen to weld PE

though.

Well hope this is useful, be nice to be able to help you for a change!

Cheers,

Dave R.

"Wayne G. O'Shea" wrote:

My turn to ask a question from all you well rounded knowledgeable

people!

Having a problem with a customers Pegastol (read shitbox from

K'beck!!)

that

has terrible rotomoulded plastic wing & main tanks. It's been an

ongoing

battle to try and seal his outlets and drains to keep them from

dripping

or

weeping. Have tried numerous sealers over the last year + and even the

fuel

proof stuff seems to let go with his Esso premium car gas. Seal All,

Goop,

Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my

hands

up in case someone has a better solution as I'm not sure if Proseal is

going

to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings

are

plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[David Ricker]

Wayne

I don't know about being knowledgable but I might as well toss out a few ideas
in case it makes someone think of a solution.

On the adhesives I'm not sure if there is anything that will stick to PE very
well but here are a couple of ideas. Given any though to hot melt adhesives? I
don't know of any particular one but there might be a formulation that would
take to the PE tanks. Give your local industrial adhesive rep. a call & see if
you can get a sample & a gun to apply it. I was looking at using one of the
"Engineering" grades on a project a while back and the rep for Amisol (?) was
helpful.

Another idea would be one of the castable polyurethanes like Devcon Flexane 80.
Cast it around the leaky fitting in a bump covering it and spreading out around
the fitting. We used to make isolation mounts for electronic enclosures which
were immersed in mineral & silicone oils and that worked well in that
application. After cure it is about 80 durometer so it can flex with the tank
if need be. We cast right to the aluminum but I can't say how it would adhere
to the PE, maybe the Devcon rep can answer that.

You might want to try and put a bulkhead fitting in the tank and use that as a
via for the fuel line (see US Plastics, usplastic.com, P/N 16421 or similar)
they use a gasket which is compressed against the side of the tank.

Outside of that, the plastic welding sounds like as good an ideas as any (except
maybe an aircraft bladder....), perhaps you could weld some robust flanges on
where the tubes have to pass through and thread fittings into the flange.

US Plastics sell the plastic welding guns (like P/N 41066) and a how to booklet
(I have it, seems to make sense). They say you need nitrogen to weld PE though.

Well hope this is useful, be nice to be able to help you for a change!

Cheers,

Dave R.

"Wayne G. O'Shea" wrote:

My turn to ask a question from all you well rounded knowledgeable people!

Having a problem with a customers Pegastol (read shitbox from K'beck!!) that
has terrible rotomoulded plastic wing & main tanks. It's been an ongoing
battle to try and seal his outlets and drains to keep them from dripping or
weeping. Have tried numerous sealers over the last year + and even the fuel
proof stuff seems to let go with his Esso premium car gas. Seal All, Goop,
Permatex hardening etc all let the fuel get by.

Tomorrows attempt is going to be proseal, but thought I would throw my hands
up in case someone has a better solution as I'm not sure if Proseal is going
to bit into the plastic either.

Tanks are a slippery white polyethylene (I beleive) and some fittings are
plastic, some brass, some alum.

THANKS!
Wayne O'Shea
www.irishfield.on.ca
oifa@irishfield.on.ca

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[rebel]

Wayne,

Some info on welding poly e


http://www.urethanesupply.com/fenderwelder.html

Rick D.



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[Wayne G. O'Shea]

I read a 2 part epoxy package the other day and it stated "does not stick to
any plastics"! Guess you proved them wrong aye!!!!

Wayne

----- Original Message -----
From: "Mike Davis" <mike.davis@dcsol.com>
To: <murphy-rebel@dcsol.com>
Sent: Thursday, May 22, 2003 2:06 AM
Subject: Re: Plastic to Brass/alum fitting sealer?

This may seem like a bailing wire fix, but I thought I'd share it anyway.

I

bought a snow machine 3 years ago with a split/leaking plastic fuel

tank...

I took a wire brush to the crack to rough things up, then worked 30 minute
epoxy into the crack and spread it out on the surrounding "roughed up"

area.

3 years later and many hours of bouncing down the trails at -30F, and it's
still holding.

Sounds to simple... but if it works, why not!

Mike

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <murphy-rebel@dcsol.com>
Sent: Wednesday, May 21, 2003 3:53 PM
Subject: Re: Plastic to Brass/alum fitting sealer?

Thanks Dave!

I'm going to tackle it somehow tomorrow and if they still leak I'm going

to

rip the tank lids off the wings and build him some real aluminum tanks

out

of my own "pocket"....... as in the long run it will cost me less!!

Thanks again everyone,
Wayne

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[Mike Davis]

The stuff I used is the same thing I use when building remote control model
airplanes... nothing special about it. I've found that as long as there is
some texture to hold onto... it will hold.

Mike

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <murphy-rebel@dcsol.com>
Sent: Thursday, May 22, 2003 4:38 AM
Subject: Re: Plastic to Brass/alum fitting sealer?

I read a 2 part epoxy package the other day and it stated "does not stick

to

any plastics"! Guess you proved them wrong aye!!!!

Wayne

----- Original Message -----
From: "Mike Davis" <mike.davis@dcsol.com>
To: <murphy-rebel@dcsol.com>
Sent: Thursday, May 22, 2003 2:06 AM
Subject: Re: Plastic to Brass/alum fitting sealer?

This may seem like a bailing wire fix, but I thought I'd share it

anyway.

I

bought a snow machine 3 years ago with a split/leaking plastic fuel

tank...

I took a wire brush to the crack to rough things up, then worked 30

minute

epoxy into the crack and spread it out on the surrounding "roughed up"

area.

3 years later and many hours of bouncing down the trails at -30F, and

it's

still holding.

Sounds to simple... but if it works, why not!

Mike

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