Requires M.E.K.P. catalyst for curing FT-140 is an unwaxed orthophthalic general purpose polyester laminating resin which exhibits a moderate exotherm temperature and cure to allow for thicker laminate applications. An unwaxed resin is generally referred to as a laminating resin. When fully cured, the surface will remain slightly tacky. This type of material is generally used in multiple lamination's such as laying up a mold. Requires M.E.K.P catalyst for curing The table below contains the catalyst chart when using MEKP to catalyze Polyester Resins & Gelcoats. The MEKP Catalyst must be used or the resin or gelcoat will not cure. CATALYST CHART Catalyst Volume 25°C 20°C 15°C 10°C 10 ml per litre or 10 drops per oz. 30 min. 2 hr. 4 hr. --- 15 ml per litre or 15 drops per oz. --- 30 min.