https://www.unitedlabsinc.com/catalog/shopexd.asp?id=1135

My brother gave me a tube of this and it is the best stuff I have ever found. I have used it for fender flares instead of 3m, head liner, and a bunch of other places. 20 bucks a tube.

 

What size is the tube? I didn't find anything at the web site about that.

 

Peak the bottom of the picture

 

Sure enough. How did I miss that? Thanks.

It'd be interesting to see if it would hold up to repair a small crack or other defect in a plastic radiator tank. I'm not wishing ill fate on anyone, but perhaps someone on this forum will have that problem and give it a shot.