Polyurethane casting resin is a two component casting resin which exhibits good impact resistance and strength.it has low viscosity making it extremely easy to mix and works excellent in rtv silicone molds.product uses include:making models,protoypes,fugurines,prrofing molds,making reproductions etc.this is ideal resin for professional model makers,hobbitsts,crafters and taxidermists.
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How to make molds
Mould preparation Ensure that the mould is clean and dry and if the mould is made from metal,wood or rein,please use a release agent.For flexible moulds,Please use RTV silicone rubber.If the mould is wooden,ensure the wood is well sealed with varnish and/or wax based release agents.
Resinpreparation Open the part B container and examine for any signs of crystallization.If any crystals are observed place in an oven at 45-60℃ for several minutes and then allow to cool before use. For best results,ensure that the two components are at 20-25℃ before mixing. To pigment the resin a wide range of colors we suggest acrylic pigment.If using pigment,add about 1-3% paste to the part A or part B.
Mixing instructions Mix the two components in the correct ratio.mixing carefully to avoid air inclusion and making sure that the material at the sides and at the bottom of the mix vessel is well stirred in to the middle.then degassing by vacuum chamber about 1minute before pouring,and please pour gently down the side of the mould and keep pouring in the sample place.
Curing The casting can generally be demoulded within 20 minutes at room temperature.The precise demould time will vary with casting thickness,as thin section units will cure slower than thicker section units.When casting thin wall sections,ensure that the mould and resins are at least 20-25℃ to facilitate a good cure and reduce the risk of brittleness.to reduce the cure time,the mould can be pre-warmed to 40-60℃.It is not recommended to heat the liquid components.