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Frequently Asked Questions
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Frequently Asked Questions

Suggested knowledgebase articles:

Ordering & Purchasing

Mixing and Curing

Sticking, Releasing and Finishing

General Material Questions

Planning, Safety and Storage

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

Category: Mixing and Curing

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...

Which product should I use for my project?

Category: General Material Questions

Start with these three questions. This is the fastest route when you don't yet know what type of product you need: A mold or a casting? They are opposites. A mold is the negative: the cavity that cap...

Do I need a mold release, and which one?

Category: Sticking, Releasing and Finishing

It depends on the materials in contact. Here are some basic rules. Casting urethane/resin INTO a silicone mold: usually no release needed, silicone is naturally non-stick. (Exception: some resins be...

Who should I contact for help?

Category: Ordering & Purchasing

For the fastest assistance, please contact the appropriate team: Product recommendations or troubleshooting → Smooth‑On Technical Support Order questions, shipping, or returns → The distributor or s...

Can I become a Smooth‑On distributor?

Category: Ordering & Purchasing

Smooth‑On works with a network of authorized distributors worldwide. Distributor partnerships are carefully evaluated based on regional needs, market coverage, and business capabilities. In many areas...

Should I buy from Amazon or a distributor?

Category: Ordering & Purchasing

Both options are available. Authorized distributors often provide: Faster and more consistent local supply Lower shipping costs Direct access to technical support Amazon may offer convenience, but ...