Calcium Oxide

It is most critical in moisture-curing one-component PU, MS polymer, and epoxy adhesives and sealants, where even small amounts of moisture can trigger premature crosslinking.

By rapidly reacting with and absorbing ambient or residual moisture in the formulation, calcium oxide prevents the moisture-triggered curing reaction from starting prematurely, extending the usable pot life.

Yes. Calcium oxide can be incorporated in the resin or hardener component of two-component epoxy or PU systems to scavenge residual moisture and improve storage stability before mixing.

Vapor oxol 3F is engineered for reactive adhesive systems including PU and MS polymer, while Calcium Oxide H 100 is a high-reactivity grade suited for demanding applications requiring rapid moisture removal and reliable chemical stabilisation.

When used at appropriate dosages, calcium oxide is consumed in the moisture-scavenging reaction and does not adversely affect the mechanical or adhesion properties of the cured adhesive or sealant.