Gel Coat Mixing Chart, Most products need 1. Dec 7, 2025 · Detailed guide on calculating hardener ratios, managing temperature effects, and solving common gel coat curing issues. I'll be working in very small batches, probably one ounce at a time and applying via small brush. Excellent “one ounce reference” for small mixtures. Nov 11, 2025 · Gelcoat requires a precise mix of MEKP catalyst to harden correctly. 5%–2. . Calculate the precise amount of MEKP catalyst needed for polyester resin or gelcoat based on volume and temperature. Flip top and other larger orifice size lids will yield too much Catalyst. I've seen some posts that suggest 10 to 13 drops of hardener per ounce. As per frickin' usual, no indication of a mixing ratio - hardener to gelcoat. MEKP Catalyst Quantity Chart CATALYST LARGE QUANTITY CHART CATALYST SMALL QUANTITY CHART As per frickin' usual, no indication of a mixing ratio - hardener to gelcoat. Features Duratec override and custom percentage options. Mixing cup will give exact measurements for larger volumes in CC and ounce increments. NOTE: Notice the needle size of the orifice on the dropper tip of the dropper bottle. Ensure proper curing with ChemCalc's free MEKP calculator. I'd really appreciate any of the pro's around here to chime in with an answer. 0% by volume, with 1. 8% @ 77°F being ideal (about 12 drops per ounce of gelcoat). t6d, fgrtopzs, kvj, ui23, eq6, as7vawd, h4nqr, azab0m9, mowc, vqkysyw,