: Larry, what made you decide to use it,,over simply putting a little cabosil
: to thicken it? MAS has a thicker resin called FLAG that I used once for a
: fill coat and it also made a thicker coat. I wonder if the 900 and 631
: hardener would have appreciably better abrasion characteristics than the
: other epoxies.

Hi Lee,
I Just wanted a faster fill coat epoxy. It usually takes me 4-5 rolled on coats of Raka to finish a lay-up, this includes some sanding between some coats.

I have not tried just a little cabosil. I would think it would not be as clear as straight epoxy. The tough sanding that others have mentioned would be another concern.

I didn't use te 631 hardener because it may not harden clear.

I like trying different ways of doing things and this RBA project is full of things I have not tried before. Trying the thicker epoxy for fill coat is just one of them.

Larry C.