if the gasket [rubber} is flat i used some stuff made by "gortex"or gortec? i work as a boilermaker and it is used for steam or heating -cooling people as gasket material,it is black rubber w/ a slight strand of string or cord in it !most plumbing -pipe wholesale dealers sell it ,nice stuff ! good luck if you cannot find it i will get you some ! thanks mike "carryallman" wahl
