How do you seal a two part mold?

I would recommend you use mold soap or SuperSeal to coat the mold. Spraying a coat of PVA in the mold before casting will also provide a solid seal. For casting parts out of your mold, silicone usually doesn’t need any release or sealant, but the particular resin I was using met some cure inhibition against the RTV.

Whats the difference between mold Star 15 and 30?

Oomoo 30 is a tin cure silicone which a tin cure silicone are great for non shrinkage and for detail captured. Mold Star 15 on the other hand is a platinum silicone. Platinum silicone has a better lifespan if taken care properly but can range higher price wise.

How do you smooth out silicone after it dries?

Put denatured alcohol in a plant mister type spray bottle. Use a caulking gun to apply a bead of 100% silicone caulk to the joint. Apply a fine mist of denatured alcohol to the caulking bead using the spray bottle. Use your finger to smooth the bead of caulking with your finger before the alcohol evaporates.

How do you smooth silicone edges?

A laser would be the best method followed by repetitive razor slicing in ever deeper cuts to avoid frictional deformation. Another method would be cold cuts by freezing the silicone and using a regular mechanical saw.

How long does mold Star 30 take to cure?

6 hours
Curing – Mold Star™ 30 must be allowed to cure for 6 hours at room temperature (73°F/23°C) before demolding. Heat Curing – Time to demold can be reduced by applying mild heat.

What is platinum grade silicone?

Platinum silicone is a type of silicone that uses only platinum (precious metal) as a catalyser, which increases its quality, apart from silicone’s other properties. This is the ideal material for manufacturing moulds or products that will come into contact with food.

How do you mold cosplay plastic?

Polly Plastics Moldable Plastic is perfect for making plastic parts without injection molds or 2-part epoxy systems. Just heat the pellets in hot water above 150 degrees F for 2-3 minutes until they turn from white to clear. Remove them from the water and you can mold them into any shape you desire.