Gerry, since anaerobics cure in the absence of air and the presence of metal it is difficult to get them to adhear to silicone. Some of the bigger companies such as Loctite, GE sealents and adhesives, and 3M engineered adhesives sell an activator that helps in the cure. Dave Herrick at Loctite (260 492-9565) has always been a help. Good luck.