weatherproofing,50mmX2mmX600mm, 60mmX2mmX600mm , 60mmX2.5mmX600mm,to seal the conjuctions of two connectors Item name : butyl mastic tapeMaterial : Butyl Rubber,Isprene Isobutylene Copolymer.Use : to seal the conjuctions of two connectors , protect it from water damage.Size : 50mmX2mmX600mm, 60mmX2mmX600mm , 60mmX2.5mmX600mm butyl mastic tape