Final answer:
Self-cured sealant materials are supplied with a base and catalyst that must be mixed to initiate the curing process for a durable seal.
Step-by-step explanation:
Self-cured sealant materials are supplied as a two-part system that includes a base and a catalyst. These two components must be mixed together to initiate the chemical reaction that causes the sealant to set, or cure. The base usually consists of a monomer or a polymer resin, while the catalyst is often a chemical that will start the polymerization process. By mixing the two parts in the correct proportions, the material will harden, providing a durable seal for various applications. It's crucial to follow the manufacturer's instructions for proper mixing and application to ensure effective and long-lasting results.