Epoxy to use in ports

[Markus]

What kind of epoxy is used to fill out the block when porting and for filling/shaping ports?

[Reese]

On the intake side of most engines you can use A/B expoxy (made by 3M) which has the consistancy of playdough. It can be formed pretty easily but the surface should be rough and clean.

I believe it will withstand 350 deg. and is not affected by most types of fuels.

[Jay Smith]

I use a 2 part epoxy called Kop Koat I got it from some head porters that port Pro Stock heads. Have done at least 50 blocks with no problems !

[Markus]

Where can I get the stuff?

(I am going to the US tomorrow)

[Reese]

I get the A/B epoxy from a distributor in Northern California, but Edelbrock and Moroso carry the exact same type. You can buy it from many automotive speed shops like Racing Summit, Jegs, ect.