Properties of GelCoats
Gel coat is used as an in mold coating on composite parts to produce a durable part surface. It derives its name due to it high viscosity and ability to be applied thickly on vertical and overhead surfaces in one coat. It is air inhibited and cures tacky on the surface to bond with the lamination.
It is available in most popular colors. Gel coats are available in brush and spray versions and are best put down at a thickness of 0.5mm (approximately 500 g/m²).
If they are too thin, poor cure occurs and fiber pattern will result. If they are too thick, crazing and cracking can occur and the laminate will be more susceptible to reverse impact, star cracking damage.
White Isophthalic Gel Coat
|Flash Point||82 degree F|
|Weight per Gallon||10.7 – 11.0 pounds|
|Lay – up time||45-60 minutes|
|Sag Resistance||Good at 20 mils|
|Hide||Complete at 8 – 13 mils|
|Color Match||CMC maximum DE of 1 unit|