Firestop Systems by Hilti are designed to outperform and outlast any other coating or barrier systems in the industry. Firestop products offered by Hilti include solutions for temporary or permanent seals that are ready-to-use and versatile. Below, link to mastics and caulks used to seal services and joints and firestop foam, blocks and plugs for medium to large openings. Need help making a selection? We can help with features & benefits, applications or technical documents. Just call or click to ask a tech question.