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POLITUFF BODY FILLER EXTRA HARDENER ONLY BIG 120(gms)/SMALL(30gms) POLITUFF BODY FILLER WITH HARDENER 1 LITRE In some mixtures a hardener is used simply to increase the resilience of the mixture once it sets. In other mixtures a hardener is used as a curing component. A hardener can be either a reactant or a catalyst in the chemical reaction that occurs during the mixing process. A hardener may also be known as an accelerator. Do not get any of the hardener in your eyes; it could cause permanent eye damage (i.e. severe irritation or burns). Do not breathe the hardener, it could cause respiratory irritation. Can I use resin without hardener? It is only when mixed with an epoxy hardener that they can cure properly. If applied onto a floor without the hardener, the resin would remain a near liquid indefinitely and could not transform into a durable flooring system. Is Catalyst the same as hardener? Hardener and catalyst are basically the same product. In general a catalyst hardener causes a chemical reaction which results in “setting” of the epoxy resin. How much hardener do I add to paint? Regardless of size, the chosen measurement must remain the same throughout the mixing process. A mixing ratio given as 4:2:1 normally means 4 parts of base product, 2 parts thinner/reducer, and 1 part hardener. However, some paint manufactures add hardener second, and thinner/reducer last.