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.

Application: Cromar PRO GRP Hardener is a general purpose MEKP and gives consistent room temperature curing of unsaturated polyester resins and gelcoat/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 Gelcoat/Topcoat 1-4%(Subject to temperature)

Gel time and rate of curing are specified in the technical data sheet for the relevant Polylite Polyester resin and Cromar PRO GRP Gelcoats/topcoats.

Storage:

·         Storage at 25°C or below is recommended. Storage below 20°C is recommended for maximum shelf life.

·         Store in original containers away from flammables and all sources of heat, sparks or flames; out of direct sunlight and away from promoters, accelerators, reducing agents and strong acids or bases.

·         Leaking containers – Remove and isolate in safe area. Re-package or dispose (see later section) immediately.

·         Never store in refrigerators containing food and/or beverages.

Handling:

·         Inform all personnel of procedures for safe handling and review SDS with them.

·         Remove from storage area only the amount needed for one shift.

·         Wear safety glasses or goggles and chemical resistant gloves.

·         Keep away from heat, flames and sparks.

·         Avoid breathing vapours.

·         Never add peroxides directly to promoters or vice-versa, violent decomposition can occur.

·         Prevent contamination such as contact with dust, over-spray, wood and combustible material.

·         Never allow contact with metal of any type except 304 or 316 stainless steel or equivalent.

First Aid:

·         EYES – Flush immediately with large amounts of fresh water and continue washing for at least 15 minutes- Medical attention is needed.

·         SKIN – Wash with soap and water.

·         INGESTION – Administer large amounts of milk or water and call a doctor immediately for lavage. Do not induce vomiting.

Spills:

·         Clean up immediately by absorbing with inert material – vermiculite, perlite or sand.

·         After absorbing, moderately wet immediately with water and place in a clean plastic bag lined, plastic pail.

·         Dispose of immediately in accordance with local regulations. NOTE: Spilled peroxides, if not immediately cleaned up, can become contaminated and ignite or decompose in a vigorous manner.

Fire:

·         This peroxide is hard to ignite, but burns vigorously with acceleration.

·         Use water from a safe distance – preferably with a water-fog nozzle.

·         For very small fires, an extinguisher with carbon dioxide, foam, or dry chemicals may be effective.

·         In case of a fire in or near a storage area, cool stored containers with water spray.

Health & Safety:

Please refer to health & safety data sheet on Cromar PRO GRP –Hardener.