Which sealant type is supplied as a two-part system with a base and a catalyst that polymerizes when mixed?

Which sealant type is supplied as a two-part system with a base and a catalyst that polymerizes when mixed?

• A. Self-cured materials
• B. Light-cured sealants
• C. Filled sealants
• D. Unfilled sealants

Answer: (A)

Self-curing sealants are two-part, chemically activated systems in which a base resin is mixed with a separate catalyst. When these components are combined, a chemical reaction starts and the material polymerizes into a solid film without the need for light. This is different from light-cured sealants, which set when exposed to curing light due to a photoinitiator. The terms filled and unfilled refer to the amount of filler in the material and affect handling and wear, not how the curing occurs. So, the two-part base-and-catalyst system that polymerizes upon mixing best fits the description.

Self-curing sealants are two-part, chemically activated systems in which a base resin is mixed with a separate catalyst. When these components are combined, a chemical reaction starts and the material polymerizes into a solid film without the need for light. This is different from light-cured sealants, which set when exposed to curing light due to a photoinitiator. The terms filled and unfilled refer to the amount of filler in the material and affect handling and wear, not how the curing occurs. So, the two-part base-and-catalyst system that polymerizes upon mixing best fits the description.