- Polymer Name:Polyester (unspecified)
- Chemical Family:Polyesters
- End Uses:Foams
Crestamould® B21 Sealer is a brushable sealing laminating resin for polystyrene foam surfaces. When used with a chopped-strand mat, this sealer provides a styrene-resistant barrier between the polystyrene plug and styrenated tooling pastes. It has good adhesion to tooling pastes like Crestamould® T29. Crestamould® B21 sealer has a low styrene content, significantly reducing polystyrene surface erosion compared to traditional styrene-containing resins. The sealer can be used to laminate CSM to create a more structurally stable foundation for mold production.