The heavier fast-cut grits (40/80/100) are used to feather sand and ground out a routed area prior to filling. Catalyzing Gelcoat with MEKP: The catalyst level (MEKP) should not exceed 3.0% or fall below 1.2 for proper cure. Honda 5hp Outboard, Boat There are a couple of possibilities though, one is with so little catalyst needed it will get hard no matter what the end user does, two maybe most people just use small amounts and with a short gel time it won't drain out as much and the other reason has to do with resin chemistry. If one CC is roughly 30 drops as stated below that would put me at roughly 18.75 drops of MEKP per ounce of gelcoat. Stir well. Tubes, Shop 0000000016 00000 n Let's hope this works this time! Darker colors need a little more catalyst for the same reaction, so you can catalyze up to 2%. Plumbing, Fresh Water Boat of Gelcoat = 1.5% @ 75F. Copyright 2019 IBOATS. How much does a gallon of polyester resin weight? No catalysts are needed. Do you need to add catalyst to resin? Deals, Electrical Rails, Marine Tools & Tool 13-15 cc per quart. As nouns the difference between catalyst and hardener is that catalyst is (chemistry) a substance that increases the rate of a chemical reaction without being consumed in the process while hardener is one who, or that which, hardens. Oars, Wakeboard, Wakesurf & As mentioned above, the plastic is to help with the cure. If you change colors, it will require at least two gelcoat coats.If this is going over a patch, at least 2 coats are recommended to get a uniform surface. Seats, Pontoon Boat Seats & Marine Battery Chargers, Shop
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