Sealants, Adhesives and Caulks

Sealants, Adhesives and Caulks KONASIL is used to increase viscosity, provide reinforcement, and improve bond strength when used in sealants, adhesives and caulks formulations. In one-part and two-part RTV silicone sealants, KONASIL is used to provide rheology and reinforcement at a level of 5 to 10wt% in the formulations. Many solvent-based adhesives consist of an elastomer and a solvent. KONASIL is used to improve not only the rheology but also the bond strength of the elastomers used in adhesives. KONASIL is also used in hot-melt adhesives. These adhesives are in the spotlight because of their lack of solvent and the consequent avoidance of air pollution problem. Hot-melt adhesives are thermoplastics that when melted adhere to their substrates. On cooling they revert to a solid form and thus become an adhesive layer with considerable strength. KONASIL can be used at about 5wt% in polystyrene-polyolefin-polystyrene blocked copolymer rubber to impart improved strength properties.