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Moldmaking Questions

How much mold rubber do I need?

I am making a brush on rubber mold and want to know how many square feet (meters) a unit of mold rubber will cover.

What do the terms "heat curing" and "post-curing" mean?

How can I make my Mold Max® silicone rubber cure faster?

How do I build a hot box oven for heat curing materials?

Why are there bubbles on the surface of my rubber mold?

What is the best method for mixing mold rubber?

How do I release silicone from silicone?

How do I release urethane from urethane?

I am making a mold for the first time. Do I need a release agent? If yes, which release agent should I use?

I made a mold using silicone rubber and experienced sticking. I know that silicone rubber is not supposed to stick to anything. What happened?

What is "cure inhibition"?

I attempted to add new rubber to an already cured urethane rubber mold and the new layer delaminated. What happened and how can I get the rubber to stick?

Why does my Brush-On rubber run off of my model when I apply it?

How do I make a mold box?

I have a vacuum pump and chamber, but mostly use urethane rubber that I do not vacuum. Is there any advantage to vacuuming my urethane rubber before pouring?

I measured and mixed my silicone rubber as directed, but did not vacuum the material prior to pouring. My cured rubber mold had many bubbles. Is vacuuming the rubber that important?

I recently obtained a vacuum chamber and pump to get the air out of my silicone rubber. When I vacuum the material (after mixing Parts A + B), my silicone takes forever to de-air and I still end up with some bubbles in my silicone rubber. Is this normal?

Is there a way around investing in a vacuum pump and vacuum chamber?

What variables will help determine which mold rubber is right for my candle making project?

What does 'Shore Hardness' mean?

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