Adhesive/Epoxy that won't dissolve in gasoline?

Post by francis
Hi there,
Curious if anyone can recommend an epoxy/adhesive that will both adhere to
HDPE plastic and not dissolve in gasoline? A bit of backstory..
Shortly after purchasing a used car I planned to subject to winter duty,
the plastic gas tank wiggled itself loose and made contact with the
spinning driveshaft, wearing a nice elongated hole in the tank. With no
nearby replacement available, I went down the rabbit hole of plastic
welding HDPE tanks, and successfully closed that hole. With this fix
replacement tank straps were acquired, and the risk of a shifting tank was
abated. 20,000+ miles and a year later, the plastic weld is letting go,
and gas is leaking again.. I can hardly be annoyed that the weld held on
for as long as it did, but I opted for a hopefully permanent fix this
time.
I picked up a replacement tank, but upon delivery, I found the tray that
the pump sits in had broken free from the tank itself. The yellow tray
seen in this picture: https://i.imgur.com/x9bCPWym.jpg
It appears to have originally been glued in placed, judging by this
picture: https://i.imgur.com/luj0Z9Zm.jpg
I really don't like the idea of this tray sloshing around in the tank,
potentially knocking off the pickup sock at the worst time, so I'm looking
for recommendations of adhesive that can stand to survive being submerged
in gasoline permanently. I've found a few options, such as LOCTITE 1252795
and Seal-All, but figured I'd ask to see if anyone recommends something
else.
What would you use to secure the tray in this situation?

Not only will the glue need to withstand gasoline but also Ethanol and
water. About 50% of the gas stations in the USA use double wall FRP
pipe and the pipe joints are epoxy glued with epoxy made for that. The
other 50% use double wall HDPE but they are not glued. They are either
hot welded or clamped. I don't know of any glue that will adhere to
HDPE. BTW, the photos don't work.

francis

2024-12-02 23:13:37 UTC

Post by francis
Hi there,
Curious if anyone can recommend an epoxy/adhesive that will both adhere
to HDPE plastic and not dissolve in gasoline? A bit of backstory..
Shortly after purchasing a used car I planned to subject to winter
duty, the plastic gas tank wiggled itself loose and made contact with
the spinning driveshaft, wearing a nice elongated hole in the tank.
With no nearby replacement available, I went down the rabbit hole of
plastic welding HDPE tanks, and successfully closed that hole. With
this fix replacement tank straps were acquired, and the risk of a
shifting tank was abated. 20,000+ miles and a year later, the plastic
weld is letting go, and gas is leaking again.. I can hardly be annoyed
that the weld held on for as long as it did, but I opted for a
hopefully permanent fix this time.
I picked up a replacement tank, but upon delivery, I found the tray
that the pump sits in had broken free from the tank itself. The yellow
tray seen in this picture: https://i.imgur.com/x9bCPWym.jpg
It appears to have originally been glued in placed, judging by this
picture: https://i.imgur.com/luj0Z9Zm.jpg
I really don't like the idea of this tray sloshing around in the tank,
potentially knocking off the pickup sock at the worst time, so I'm
looking for recommendations of adhesive that can stand to survive being
submerged in gasoline permanently. I've found a few options, such as
LOCTITE 1252795 and Seal-All, but figured I'd ask to see if anyone
recommends something else.
What would you use to secure the tray in this situation?

Interesting, I appreciate the info, and apologize for the non-functioning
pictures. Please see the updated links:

https://imgur.com/x9bCPWy - Tray in question
https://imgur.com/luj0Z9Z - Leftovers in tank where the tray sat

I'm finding similar difficulties with folks attempting to get anything to
adhere to HDPE as well. I might end up needing to source another tank..

Paul in Houston TX

2024-12-02 23:43:46 UTC

Post by francis
Hi there,
Curious if anyone can recommend an epoxy/adhesive that will both adhere
to HDPE plastic and not dissolve in gasoline? A bit of backstory..
Shortly after purchasing a used car I planned to subject to winter
duty, the plastic gas tank wiggled itself loose and made contact with
the spinning driveshaft, wearing a nice elongated hole in the tank.
With no nearby replacement available, I went down the rabbit hole of
plastic welding HDPE tanks, and successfully closed that hole. With
this fix replacement tank straps were acquired, and the risk of a
shifting tank was abated. 20,000+ miles and a year later, the plastic
weld is letting go, and gas is leaking again.. I can hardly be annoyed
that the weld held on for as long as it did, but I opted for a
hopefully permanent fix this time.
I picked up a replacement tank, but upon delivery, I found the tray
that the pump sits in had broken free from the tank itself. The yellow
tray seen in this picture: https://i.imgur.com/x9bCPWym.jpg
It appears to have originally been glued in placed, judging by this
picture: https://i.imgur.com/luj0Z9Zm.jpg
I really don't like the idea of this tray sloshing around in the tank,
potentially knocking off the pickup sock at the worst time, so I'm
looking for recommendations of adhesive that can stand to survive being
submerged in gasoline permanently. I've found a few options, such as
LOCTITE 1252795 and Seal-All, but figured I'd ask to see if anyone
recommends something else.
What would you use to secure the tray in this situation?

Interesting, I appreciate the info, and apologize for the non-functioning
https://imgur.com/x9bCPWy - Tray in question
https://imgur.com/luj0Z9Z - Leftovers in tank where the tray sat
I'm finding similar difficulties with folks attempting to get anything to
adhere to HDPE as well. I might end up needing to source another tank..

I see...
I manage fuel contractors every day. I no longer have to be covered in
gasoline or diesel, or breath the fumes. Now I just manage... North
America. I don't know of a glue type stuff that can be constantly
immersed in gasoline. Even the fuel piping epoxy needs to be heated to
~150F / 65C for 30 minutes to fully cure. You could try fuel resistant
Permatex epoxy. Rough up both the tank and tray first so the epoxy has
something to grab onto. That's the problem with HDPE... it is slick.
Maybe there is enough "Leftovers" sticking to the tank and tray for the
Permatex epoxy to stick to.

francis

2024-12-03 04:13:47 UTC

Post by francis
Hi there,
Curious if anyone can recommend an epoxy/adhesive that will both
adhere to HDPE plastic and not dissolve in gasoline? A bit of
backstory..
Shortly after purchasing a used car I planned to subject to winter
duty, the plastic gas tank wiggled itself loose and made contact with
the spinning driveshaft, wearing a nice elongated hole in the tank.
With no nearby replacement available, I went down the rabbit hole of
plastic welding HDPE tanks, and successfully closed that hole. With
this fix replacement tank straps were acquired, and the risk of a
shifting tank was abated. 20,000+ miles and a year later, the plastic
weld is letting go, and gas is leaking again.. I can hardly be
annoyed that the weld held on for as long as it did, but I opted for
a hopefully permanent fix this time.
I picked up a replacement tank, but upon delivery, I found the tray
that the pump sits in had broken free from the tank itself. The
yellow tray seen in this picture: https://i.imgur.com/x9bCPWym.jpg
It appears to have originally been glued in placed, judging by this
picture: https://i.imgur.com/luj0Z9Zm.jpg
I really don't like the idea of this tray sloshing around in the
tank, potentially knocking off the pickup sock at the worst time, so
I'm looking for recommendations of adhesive that can stand to survive
being submerged in gasoline permanently. I've found a few options,
such as LOCTITE 1252795 and Seal-All, but figured I'd ask to see if
anyone recommends something else.
What would you use to secure the tray in this situation?

Not only will the glue need to withstand gasoline but also Ethanol and
water. About 50% of the gas stations in the USA use double wall FRP
pipe and the pipe joints are epoxy glued with epoxy made for that.
The other 50% use double wall HDPE but they are not glued. They are
either hot welded or clamped. I don't know of any glue that will
adhere to HDPE. BTW, the photos don't work.

Interesting, I appreciate the info, and apologize for the
https://imgur.com/x9bCPWy - Tray in question https://imgur.com/luj0Z9Z
- Leftovers in tank where the tray sat
I'm finding similar difficulties with folks attempting to get anything
to adhere to HDPE as well. I might end up needing to source another
tank..

Thank you, I really appreciate the information. I'll pick up some Permatex
locally tomorrow and give it a shot. Thank you again.

francis

2025-01-21 16:31:31 UTC

Post by francis
Hi there,
Curious if anyone can recommend an epoxy/adhesive that will both
adhere to HDPE plastic and not dissolve in gasoline? A bit of
backstory..
Shortly after purchasing a used car I planned to subject to winter
duty, the plastic gas tank wiggled itself loose and made contact
with the spinning driveshaft, wearing a nice elongated hole in the
tank. With no nearby replacement available, I went down the rabbit
hole of plastic welding HDPE tanks, and successfully closed that
hole. With this fix replacement tank straps were acquired, and the
risk of a shifting tank was abated. 20,000+ miles and a year later,
the plastic weld is letting go, and gas is leaking again.. I can
hardly be annoyed that the weld held on for as long as it did, but I
opted for a hopefully permanent fix this time.
I picked up a replacement tank, but upon delivery, I found the tray
that the pump sits in had broken free from the tank itself. The
yellow tray seen in this picture: https://i.imgur.com/x9bCPWym.jpg
It appears to have originally been glued in placed, judging by this
picture: https://i.imgur.com/luj0Z9Zm.jpg
I really don't like the idea of this tray sloshing around in the
tank, potentially knocking off the pickup sock at the worst time, so
I'm looking for recommendations of adhesive that can stand to
survive being submerged in gasoline permanently. I've found a few
options, such as LOCTITE 1252795 and Seal-All, but figured I'd ask
to see if anyone recommends something else.
What would you use to secure the tray in this situation?

Not only will the glue need to withstand gasoline but also Ethanol
and water. About 50% of the gas stations in the USA use double wall
FRP pipe and the pipe joints are epoxy glued with epoxy made for
that. The other 50% use double wall HDPE but they are not glued.
They are either hot welded or clamped. I don't know of any glue that
will adhere to HDPE. BTW, the photos don't work.

Thank you, I really appreciate the information. I'll pick up some
Permatex locally tomorrow and give it a shot. Thank you again.

Hi there,

Much later than I intended, but I wanted to post an update to this post. I
ended up sourcing another plastic fuel tank that had that tray still
intact. I figured with this car being used during the winter months as a
'winter beater' I didn't want to leave an issue that could leave me
stranded on the side of the road in less than ideal conditions. I
appreciate the wisdom that was shared however!

Paul in Houston TX

2025-01-21 23:48:56 UTC