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Cromar PRO GRP Hardener (5kg)


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Cromar PRO GRP Hardener is a Methyl Ethyl Ketone peroxide in phlegmatizer for the curing of unsaturated polyester resins at ambient temperature in combination with colbalt accelerators.


Cromar PRO GRP Hardener is a general purpose MEKP and gives consistent room temperature curing of unsaturated polyester resins and topcoats.
A reliable product of remarkable purity, Cromar PRO GRP Hardener assures quality in almost every system.

Suitable applications are hand lay-up, spray-up, RTM, continuous laminating, centrifugal casting, filament winding, polymer concrete and vacuum infusion.

Using a standard type of pre-accelerated Polylite Polyester resin 1-4% Cromar PRO GRP Hardener is normally added and for Cromar PRO GRP Topcoat 1-4% (Subject to temperature)

Catalyst must be added to all resin and topcoat in order for it to cure.

For full application instructions please see the “Installation Guide” tab.

For ease of mixing/measuring use in conjunction with Catalyst Dispenser & PRO GRP Graduated Mixing Bucket.

Always wear eye protection and gloves when handling catalyst.


As a standard MEKP catalyst, product can be used within traditional GRP Roofing systems (Cure IT, Stronghold, Trade Grade). However, using a mismatching branded catalyst will invalidate any Material Guarantee where eligible.

SKU: PRCAT5 Categories:,

Additional information

Weight 5 kg

Installation Guide

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Data Sheets

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