Metox‑50 Catalyst 100 ml – Marine‑Grade Polyester Resin Hardener (MEKP)
Reliable methyl ethyl ketone peroxide catalyst for marine gelcoat & resin curing
- Volume: 100 ml bottle, standalone hardener for small to medium projects on Irish boats
- Active oxygen: 9.3–9.8 %, organic peroxide content 33–36 %
- Density: ~1.17 g/cm³ at 20 °C; viscosity ≈25 mPa·s
- SADT (self‑accelerating decomposition temperature): 60 °C; storage 0–25 °C
- Recommended mixing ratio: 1‑2 % for standard cure; up to 3 % for faster gel time (~15‑20 min at 20 °C)
- Use with cobalt accelerators; suitable for hand & spray lay‑up, gelcoats, coatings & filled/polymer concrete
- Packaging: clear, colourless MEKP in dimethyl phthalate solvent; slightly water‑soluble (~2 %)
- Hazard classification: oxidizer (Org. Perox. Type D), corrosive; use stainless steel/PE/PVC/glass tools only
The Metox‑50 Catalyst is a marine‑rated methyl ethyl ketone peroxide hardener designed for curing unsaturated polyester resins and gelcoats—ideal for sailing in Ireland’s coastal conditions. Used at 1‑2 % by weight, it delivers a durable, corrosion‑resistant finish, with optional 3 % dosing for faster cure in cooler climates. Compatible with manual and spray lay‑up techniques, it ensures professional-grade results while meeting safety needs—just handle carefully, using appropriate PPE and inert tools to protect against oxidising and corrosive properties.


