Tank repair Q.

[Nedimbek]

Water is also a good substitute to avoid sticking to the finger while forming a fillet. Applying Proseal with the gun, waiting 15-30 minutes and smooting it out to a fillet using a damp finger works like a charm. In your case, working blind in a confined space is the biggest challenge which I'm not sure how it works. We used the above technique to form a nice fillet when sealing inside corners and edges with Semkit ploysulphide sealent (basically same as tank sealant stuff) around cupola and hatch assemblies of armored vehicles.

[RepmikeBrown]

Gil, I just finished sealing both tanks. I used a large syringe and scooped in proseal.
These were new tanks. Layed in great, looked perfect yet failed leak test. I then cut 4" holes in the aft. put on laytex gloves and finger dipped and smeared good fillets. You'll be working blind just like tightening bolts on an engine. After letting set overnight I inspected with a bore scope I picked up at the parts store. There was a few places that needed another dose. I wouldn't thin proseal unless you check with vans or manufacturer, as cross link of polymers will be compromised. Not worth the chance. Tanks passed.

[DavidBurton]

I think Sam Buchanan used MEK to thin the Proseal he used in his tanks, way back in 1998. As far as I know he hasn't had an issue with them. I'd be a little leery of this too, but he had success with it.
http://home.hiwaay.net/~sbuc/journal/index.html

[rv7charlie]

MEK works, but I *IIRC*, the Flamemaster docs say to use Toluene. At any rate, it's in the docs, so easy to see for yourself.

[JonJay]

I used MEK only as a release agent so the pro seal wouldn't stick and ball up on the glove finger. None was mixed into the proseal.

[Sam Buchanan]

Originally Posted by DavidBurton

I think Sam Buchanan used MEK to thin the Proseal he used in his tanks, way back in 1998. As far as I know he hasn't had an issue with them. I'd be a little leery of this too, but he had success with it.
http://home.hiwaay.net/~sbuc/journal/index.html

Yep, tanks still holding fuel. Only a tiny amount of MEK was needed to make the proseal more viscous so it could be applied with a stiff acid brush.

http://home.hiwaay.net/~sbuc/journal/tanks2.html