SikaLastomer® 831E Sika SikaLastomer® 831E is a preformed butyl sealant designed for long-lasting and flexible sealing in a wide range of industrial applications. Offering excellent adhesion to glass, metals, plastics, and painted substrates, it is widely used in construction, automotive, and industrial sectors for joint sealing, glazing installation, panel fixing, and enclosure sealing, providing reliable protection against water, air, and dust while allowing easy repositioning or disassembly. Learn more