Black Tooling Polyester Gelcoat 1 Gallon with Hardener MEKP DDM-9

SKU: 1187-Gallon|2128-2oz


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Isophthalic Tooling Gel Coats are designed to provide the hard, durable, high-gloss surface required in a superior grade polyester tool. The toughness and chemical resistance of these tooling gel coats will develop within 24 – 48 hours after lamination and removal from the master or plug. This rapid development of physical properties allows the mold builder to develop the high-gloss, mirror-like finish required in polyester molds.


We suggest that the gel coats be applied in multiple passes of the spray gun in order to slowly build up the desired thickness. It is recommended that only 3-5 mils be applied with the initial passes of the spray gun. The “several passes” technique will keep air entrapment at a minimum and result in a “pin hole and porosity free” film. A film thickness of 20-25 mils should be applied in order to obtain maximum mold life. It is essential that the mold temperature and ambient air temperature, as well as the material temperature, be within a temperature range of 65°F/18.3°C to 80°F/26.6°C for best results.

Under normal conditions the gel coat is ready to “lay up” in 1 to 2 hours. The “time to laminate” is dependent on the room temperature, humidity and air movement, as well as the initiator concentration and the film thickness. These products should not be used when the temperature conditions, both mold and ambient, are below 65°F/18.3°C as the curing may be adversely affected.

Both the polyester gel coat and the initiators may cause burns to eyes and skin. Avoid contact with the eyes! Avoid breathing vapors! Gel coat applicators should wear a NIOSH approved respirator effective for vapors, spray mist and dust. In case of accidental contact, remove contaminated clothing and wash affected skin areas with soap and copious quantities of water. Contact a physician if persistent skin irritation occurs. For eyes, immediately flush with plenty of water for at least 15 minutes; call a physician immediately. Wash contaminated clothing before using.

Hardener (2oz MEKP DDM-9) and mixing instructions are included.

The item has a shelf life of approximately 2-3 months. To ensure quality results and proper curing, please make sure to use the resin soon after purchase.

5 Gallon purchases will be charged by the shipping company an additional $50 Hazmat fee.

This item is in stock but due to short shelf life, this product may be shipped direct from the manufacturer. This may add 1-3 business days to lead time.

This item is flammable and can only be shipped by ground. If you paid for expedited shipping, we will refund you the difference for it to be shipped by ground.

Please Note: Hardener / Catalyst has a 12 month shelf-life.

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Weight per Gallon

Specific Gravity, 77°F/25°C.

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Black Tooling Polyester Gelcoat SDS

Black Tooling Polyester Gelcoat TDS

MEKP (Methyl Ethyl Ketone Peroxide) SDS

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