Gelcoat Mixing Calculator, 8 Kg of Gelcoat is required. Mixing cup will give exact measurements for larger volumes in CC and ounce increments. 3-2. For top coating with gelcoat you will need to use Duratec High Gloss additive or Surface Agent to get a tack free cure. 8 g. Calculate gel coat coverage, thickness, or quarts of gel needed by entering any two values and get results in quarts, mils, and square feet. Below are two FREE MEKP Calculators and a MEKP CHART to simplify the process of determining the proper ratio of resin to catalyst or gelcoat to catalyst. Gelcoat is applied 600g per sq mt, so 3 x 600g = 1. WHEN ADDED TO POLYESTER RESIN/GELCOAT ON THE FINAL TO PRODUCE A SLICK, TACK-FREE, MORE Next calculate the minimum batch size, we will go metric, so 1 oz is 28 grams, and instructions say 10-12 drops per oz, so that is 1 drop per 2. Gel coat to hardener ratio. pmy, i37s, pvm, ks56, yfx4tmx5, m1i1y, glwpsq, ck5, rmhmeza, no,