Seal Systems

Nelson Firestops – CLK Silicone Sealant

Nelson Firestop Sealant (CLK™) is a family of one part silicone flexible sealants, used to protect from the spread of fire, smoke, gases and water. It is designed for applications of through stop penetrations and in construction joints. It is offered in two forms, a non-sag caulk which can be troweled and a self-leveling grade suited for floor applications.