We suggest you use Loctite® #262 with this gasket. This is for the welded stud boilers, not the "cage style" (GS Series) that use the bolt and internal nut configuration. For those, use the old, 8 hole paper gasket: MZ_8
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.