Thread: Sealant for Diesel Fuel Tank

I think polyurethane is impervious to diesel - sikaflex, etc - but not 100% sure, hopefully someone else will know of something or confirm my thoughts.

Originally Posted by Homestar

I think polyurethane is impervious to diesel - sikaflex, etc - but not 100% sure, hopefully someone else will know of something or confirm my thoughts.

Cheers, Given the position I don’t really want it leak as it would mean dropping the sill thank.

Redkote works well with steel tanks. Not sure about poly.

Originally Posted by rar110

Redkote works well with steel tanks. Not sure about poly.

Err, looks like an internal tank liner, I’m looking to seal a 60mm hole where a gauge would normally go. I.e. gasket between a piece of plate and the tank.

I think it's true that it's almost impossible to stick anything to HDPE. You might get the best result by using small diameter screws with nuts close together and a suitable soft fuel resistant gasket between tank and Al cover plate.
Don

Originally Posted by Don 130

I think it's true that it's almost impossible to stick anything to HDPE. You might get the best result by using small diameter screws with nuts close together and a suitable soft fuel resistant gasket between tank and Al cover plate.
Don

I used POR on my S2a Tank.

Forget Amazon, you can buy it fom Paint Supply Places.


https://www.amazon.com.au/dp/B00B3HX...restau-22&th=1

Originally Posted by W&KO

Err, looks like an internal tank liner, I’m looking to seal a 60mm hole where a gauge would normally go. I.e. gasket between a piece of plate and the tank.

Seems that people don't understand that you're sealing a hole in a PE tank not sealing the inside of a steel tank....

Originally Posted by Don 130

I think it's true that it's almost impossible to stick anything to HDPE. You might get the best result by using small diameter screws with nuts close together and a suitable soft fuel resistant gasket between tank and Al cover plate.
Don

Years ago I was involved with treating PE so that you could glue it or print on it.
One method was 'flaming'. Bottles were passed through a flame and you could print on them for an hour or so.
The other method was corona discharge. Very high voltage was passed through a wire and the air surrounding the wire is ionised and you get a blue glow, the wire was then passed over the area to be treated. Again you could glue/print for a short period of time.
This was the company I visited about 35 years ago The Basics of Corona treatment | Watch our video here!

Possibly both of these methods are not suitable.

As Don 130 mentioned, a plate the same size as the gauge bolted in place with a gasket is probably the answer.


Colin

Originally Posted by W&KO

Err, looks like an internal tank liner, I’m looking to seal a 60mm hole where a gauge would normally go. I.e. gasket between a piece of plate and the tank.

Sorry should have been clearer. I was thinking extra sealant on the inside after you attached a plate.