Toobuilder
Well Known Member
Ive been in military aerospace for a few decades and like you, I’ve seen my share of sealant laid down. We will only coupon test sealant that goes into an area that needs to be closed prior to cure (rare). That said, QA needs to buy the final cure (tack free, time and durometer) before the assembly can be sold, and of course, the final check is the soak test. I have also seen plenty of “goo” in my day, but it’s always been a mix or batch failure - not seen an environmental failure yet.
Disclaimer: “tank rats“ are artists with a horrible job - I don’t claim to be one. But it seems to me that if you are going to have a reaction to fuel at some point, best to know that while the tank is still on the bench. The “goo story” above is even MORE of a compelling reason to soak check the tanks in my mind.
