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Mixing and Curing
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Mixing and Curing

Suggested knowledgebase articles:

What's the mix ratio, and do I measure by weight or by volume?

The ratio is printed on the product's TDS and on the container. The most important thing to know: by-weight and by-volume ratios are often different numbers for the same product because Part A and Par...

What's the difference between pot life and cure time, and can I make it cure faster or slower?

Pot life (a.k.a. work time) is how long you have to mix and pour before the material starts to set. Cure / demold time is how long until it's firm enough to remove. Cure time does not include pot life...

Does temperature or humidity affect my results?

Yes, a lot. Most failed pours that aren't a mix-ratio problem trace back to the room or the material being too cold, too hot, or too humid. Cold slows cure and can stall it entirely; material poured ...

My platinum silicone came out tacky / gooey / won't fully cure. What happened?

This is almost always cure inhibition: platinum (addition-cure) silicones are poisoned by contact with certain materials, leaving a sticky, uncured surface against that material. Tin-cure silicones ar...

My casting has bubbles. Do I need a vacuum chamber or a pressure pot?

They do different jobs, pick by what you're pouring: Vacuum chamber, degasses the mixed material before pouring, pulling trapped air out. Best for silicone molds, where you want a bubble-free mold su...