[gmkonrad]

I just coated the floor of a composite fuel tank, (non RV) with MC-236-B2 fuel tank sealant. How long do I need to wait before I can put fuel in the tank? Is three days long enough? Any thoughts?

Gary

 

[Kyle Boatright]

Depending on temperature, how you mixed it, etc. proseal can take a day or a month to cure. The way to tell it is cured is when it is firm (not tire rubber firm, but tougher than RTV) when you try the thumbnail test on it.

 

[Larco]

The manufacturer told me that it is ok for fuel when, touching the proseal it doesn't leave a fingerprint. Larry

 

[jarhead]

If you mixed it correctly (by weight, with a scale) and applied it correctly, 3 days is plenty of time.