Mold Sealer for Composite Tooling

This mold sealer is the first step in new composite mold preparation before applying mold release agent. New composite molds (gelcoat or laminate surfaces) have surface microporosity from the manufacturing process. If release agent is applied directly to an unsealed mold, it is absorbed into the surface porosity and an effective continuous release film is not established. This mold sealer penetrates and fills the surface microporosity of new gelcoated and laminate molds, creating a sealed, non-porous surface ideal for subsequent mold release agent application. Applied by wipe-on/buff-off method. Minimum 2–3 coats are required for a new mold. After full cure of the sealer, apply the mold release of choice. The sealed mold surface requires fewer initial release coats and establishes a more durable release film. Sealer also revitalizes older molds showing surface micro-crazing or porosity from long production use. Compatible with polyester, vinyl ester, and epoxy mold surfaces.