The Ford Barn - View Single Post

rotorwrench · 05-20-2022, 09:20 AM

The Hirsch stuff looks just like the Kreem stuff I first used back in the 70s. POR 15 has a similar color to it. They are all made to seal automobile gas of all types. Modern gas has oxidizers in it so it's not as stable as it used to be. If there is even a pin hole in the seal coat the corrosion will come back.

The problems associated with use of any sealer is how well the interior of the tank has been prepared. If there is any corrosion in there that has not been removed or converted completely then it will just start rusting again. Another problem is whether the water used in rinsing is fully removed. The sealer will mix with solvents but it won't mix with water. Oil contamination is another possible problem. The tank has to be completely cleaned of all corrosion and contaminants or the coating won't stick right. It can flake or peel off in sheets on an improperly prepared tank.

Cleaning out any enclosed item where you don't have access is a very difficult and tricky operation even under the best situations.

05-20-2022, 09:20 AM	#16
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,426	Re: 32 Ford Fuel Tank The Hirsch stuff looks just like the Kreem stuff I first used back in the 70s. POR 15 has a similar color to it. They are all made to seal automobile gas of all types. Modern gas has oxidizers in it so it's not as stable as it used to be. If there is even a pin hole in the seal coat the corrosion will come back. The problems associated with use of any sealer is how well the interior of the tank has been prepared. If there is any corrosion in there that has not been removed or converted completely then it will just start rusting again. Another problem is whether the water used in rinsing is fully removed. The sealer will mix with solvents but it won't mix with water. Oil contamination is another possible problem. The tank has to be completely cleaned of all corrosion and contaminants or the coating won't stick right. It can flake or peel off in sheets on an improperly prepared tank. Cleaning out any enclosed item where you don't have access is a very difficult and tricky operation even under the best situations.