How To Mix Gel Coat With Hardener, Calculate the precise amount of MEKP catalyst needed for polyester resin or gelcoat based on volume and temperature. Bondo® Filler Types and Uses Bondo® Original Filler Ready Mix Pouches Convenient ready mix pouches which means no need to measure filler and hardener Two-pack of pre-measured, two-part formula saves time and eliminates guesswork Original two-part hardener to repair dents, dings, and scratches in your home or on your car Jul 17, 2012 · Gelcoat Color Match Chart Our Gelcoat Color Match Chart is the perfect solution for any boat repair project. The box contains fiberglass resin, resin hardener, an applicator brush, mixing cup and sticks, and a generous quantity of fiberglass matting. Our Brushable Gel coat comes with MEKP hardener with every purchase, but you may need more, which you can purchase as an option depending on the application, temperature and other environmental factors. For Fiberglass: Fiberglass repair kit (resin, hardener, cloth, gel coat), acetone, polyester putty. THE RATIO IS APPROXIMATELY ONE OUNCE OF HARDENER PER GALLON OF RESIN. Generally speaking (and depending on the temperatures) a catalyst ratio of between 1. 5% 4 oz gelcoat 1 oz styrene 1/8 oz sanding aid 2. Read the pro guide. As mentioned above, the plastic is to help with the cure. Dec 5, 2025 · For Concrete/Gunite: Plaster patch mix, 2-part epoxy pool putty, bonding additive, muriatic acid (handle with extreme care). and gelcoat needs twice as much catalyist. Learn exact MEKP ratios, temperature adjustments, and measurement techniques for a rock-hard finish. 5cc or 40 drops of hardener I don't know how cold it is up there, but if it is cool you might want to go 46 drops of hardener Reply Like 10-01-2012 | 10:50 AM # 5 paraman Senior Member Joined: Nov 2003 Posts: 997 Likes: 152 Received 19 Likes on . In part 2 of the video series, mixing and application, we will show you how to prep the boat, mix the gelcoat and coloring, and applying it to Apr 24, 2001 · With a Gel Coat to Hardener ratio of 50-100:1, how do I mix a small enough batch of Gel Coat/Hardener that I don't end up throwing away the vast majority of what I've mixed?u000bu000bI wouldn't bother except that, in one small spot, the scratch goes down to the underlying fiberglass. therefore by my calculations you'll need 10 drops. Poly products need to be sealed from air to fully cure. Mix and catalyze correctly: Measure MEKP accurately and mix completely to avoid curing problems. For Vinyl Liner: Vinyl patch kit with waterproof glue, wall foam, liner lock. Bottom line: Successful gelcoat application Jun 28, 2010 · Learn how to do minor gelcoat repairs to your boat. I realise it may be useless but want to mix a sample. u000bu000bTIA. Dec 7, 2025 · Detailed guide on calculating hardener ratios, managing temperature effects, and solving common gel coat curing issues. If applying less to fill a hollow spot, I suggest staying with specified cat ratio and over-applying to approximate OK thickness and then sanding down afterward.
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