How to make a Urethane Mold
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@malveytj Polyester can be cast in a urethane mold. TAP carries a paintable mold release called Stoner Rocket Release. Most other releases do not wash off.
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can I pour polyester resin into a urethane mold? I want to cast a acrylic paint tinted resin cherry shape from a urethane mold I was given. Also, in the video, you say it needs mold release. and that it does not easily accept painting. can I was it off? Thanks.
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@seminalvesical1 Changing the hardness of a manufactured material is something we haven’t tried, if you come across some way let us know.
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how can you make the hardness (durometer) change from high to low like in skateboard/longboard wheels?
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Can I use regular silicon ?
jordon907 2 months ago
@jordon907 Our Silicone RTV and our Platinum Silicone are also great mold making materials.
tapplastics 2 months ago
Can I use this to make molds of something metal? Without it damaging my metal original?
SuperWomanNeli 9 months ago
@SuperWomanNeli The answer is a qualified yes. If the original is clean metal, and a proper mold release is used, there should be no problem. However, patina, paint, or other coatings could be affected by the mold material. Therefore, it is always appropriate to test a small area first.
tapplastics 2 months ago
I don't understand why I wouldn't be able to paint the object I cast. Let's say I cast a resin model from a urethane mold. I understand that I'd have to put mold release in the mold before pouring in the resin so that it can be removed later, but why can't i just wipe it off after i pull it out of the mold?
maikeru01 10 months ago
@maikeru01 Silicone mold release does not wipe off clean enough. There will still be a thin film left. Since silicone is not water soluble, it does not wash off easily either. Therefore, it is best to use a paintable mold release such as Rocket Release, available at our website.
tapplastics 2 months ago