How much catalyst to polyester resin

This will prevent the catalyst from splashing out when the plunger is depressed. All resins whether for casting or laminating, require the addition of catalyst hardener and accelerator if the resin is not pre-accelerated, to initiate the curing process. Use a safety dispenser bottle to add 20ml of catalyst per 1kg of resin.

Stir thoroughly - 30 mixes to the left and 30 mixes to right. The hardening process begins immediately, so only catalyze a working quantity, or your mixing containers will soon be full of solidified resin, work quickly once the catalyst has been added. When Pigments are being used they should be stirred into the resin before adding the catalyst. Please check colour charts for suggested percentage per colour to be used. The curing process generates heat known as "exotherm" within the resin. Too much catalyst or large volumes of resin increase this heat, so a thick laminate or a large casting should preferably be built up in stages.

Overheating of the resin in the mould can warp and damage the mould. Liquid Catalyst Add 2ml of catalyst per gm of resin, and stir thoroughly. Use as a guide as the temperature will vary on the catalyst ratio. With general purpose resin but NOT gelcoat the rate of cure can be slowed down by using 1g liquid catalyst per gm resin - ie. Half the quantities shown above. This can be useful in very hot weather, when the resin might otherwise cure too quickly. Add 2ml of catalyst per g of resin, and stir thoroughly.

Nivitex have various guides available for the DIY person that will help you with your next project from costings on projects to using various fibreglass products for mould making etc. We have technical information available on various fibreglass products. These guides will help you with faults, how to apply products, grades of fibreglass and much more.

Fibreglass Materials. Carbon Fibre Fabrics. Fibreglass Pool Materials. Mould Making. Vacuum Bagging. Fillers Bonding Pastes and Adhesives. Roof Sheeting. Pigment Pastes. Catalyst Requirements All resins, including Gelcoat, Poolcoat and Flowcoats must be catalyzed with catalyst MEKP or hardener before use, un-catalyzed resin simply will not harden. Download Catalyst Requirements 1. For 50 g gel coat add 1 g catalyst approximately 20 drops For g gel coat add 2 g catalyst approximately 40 drops For g gel coat add 5 g catalyst For g gel coat add 10 g catalyst For 1 kg gel coat add 20 g catalyst Catalyst is sold in bottles of 10 g, 20 g, g etc.

Catalyst and Silicone Rubber Moulding It is essential that the mixing proportions are correct otherwise very slow curing or no curing at all may result. Re: Polyester Resin tacky You need to add wax yes wax to the last layer of laminate resin as the agent to cause it to dry completely. Grind it lightly and get the wax addative or a finish waxed resin and lightly coat the area and it will be fine. How much catalyst do I need for resin?

Thorough mixing of catalyst into resins and gelcoat is very important. The addition of the correct amount ensures the best results. The table below gives the correct ratios of catalyst to resin and gelcoat by weight. Does gelcoat need wax? The recommended ratio is 1 oz wax to 1 quart of gelcoat. The first coat of gelcoat does not need the wax since you will apply a second coat. What is a nail surgery? How much does it cost to finish a Shell House?

Co-authors The agent is packaged in a small bottle or vial that is marked to show how much of the agent has been dispensed from the package in drops or fractional teaspoons. The correct ratio of hardener to resin should be calculated before the mixing process is begun to make it easier to monitor how much catalyst to dispense. The ratio range for catalyst to resin is 1 to 2 percent hardener to the total volume of resin to be used. For example, four drops of hardener will be 1 percent of 1 ounce of resin.

Adding more of less of the catalyst agent will speed up or slow down the curing time for the resin. However, adding less than 1 percent or more than 2 percent will cause the resin to cure improperly and the repair to fail.