Edelbrock Epoxy Putty is a two-part bonding mold like putty, yet harden in one hour to a steel-like consistency. They don’t shrink and aren’t affected by solvents, oils, or gasoline. The maximum temperature they can withstand is 250 degrees F, which makes them perfect for repairing intake manifolds, cylinder head intake ports, heads, and blocks. They can be drilled and tapped when hard, adhere to almost any clean surface, and harden in 60 minutes at 75 degrees F.