I am starting to seal my fuel tanks with the Jeffco 9700 Fuel tank sealer. When I brush it on, little air bubbles come up through the sealer, then burst leaving a tiny to small  pinhole.

If the room or material is in an increasing temperature condition, air will come out the pin holes.  If the Jeffco heats up when curing, this can happen.  I believe that Lancair calls for two coats and the second coat should take care of this.

 

If you are in the midwest at this time of year, apply the Jeffco at dusk and open the door - the sinking temperature will suck the Jeffco into each wee little pin hole.