Sculpture Release Agents: what Claude and GPT would buy

Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.

They disagree: Claude chooses Smooth-On and GPT chooses Mann

In Arts, Crafts & Sewing, Claude and GPT choose the same brand in 46 of 83 categories.

Claude Opus 5.5 · October 27, 2026

Smooth-On Ease Release 200

This general-purpose aerosol release works for silicone-on-silicone, resin into silicone and many other combinations, which covers most hobby molding situations.

Not for: Anyone sealing porous plaster or wood masters, which need a sealer first, and anyone who plans to paint parts without washing off the release.

GPT 6.1 Sol · November 10, 2026

Mann Ease Release 200

Versatile aerosol mold release for silicone and urethane mold-making, helping preserve detail and simplify demolding.

Not for: Food-contact molds or projects requiring a silicone-free release agent.

Claude also lists Mann among the brands that matter.

Which one fits you

resin into silicone molds

Smooth-On Universal Mold Release (line)

A light aerosol release that extends silicone mold life when casting urethanes and epoxies.

Not for: Silicone-to-silicone pours, where a dedicated release is safer.

porous or sealed masters

Smooth-On Sonite Wax (line)

A paste wax release for sealed porous surfaces such as plaster, wood and stone.

Not for: Fine-detail masters, where buffed wax can soften crisp texture.

Check before you buy

Material pairing. Choose a release for the specific pair (for example silicone on silicone or urethane in silicone) Like materials bond to each other without the right barrier.
Porous masters need sealing first. Seal plaster, wood and unfired clay before applying release Release soaks into porous surfaces and stops protecting the mold.
Paintability. Wash parts or use a paintable release if they will be painted Silicone-based release residue causes paint to bead.
Application. Apply light, even coats and let the carrier evaporate before pouring Pooled release ruins surface detail.

Specifications · 2 items

Weight: 12 oz
Format: Spray

Taken from the pages of Dick Blick on November 11, 2026, not checked.

Where to find Smooth-On Ease Release 200

Dick Blick
Utrecht Art Supplies
Jerry's Artarama

Also seen on Amazon.

Shops seen in search results on November 11, 2026. A shop missing here may sell it too. Nothing was checked by a person.

Brands that matter

Smooth-On: Matched releases for its silicones and resins.
Mann Release Technologies: The maker behind the Ease Release line.
Stoner: Industrial aerosol mold releases.

What to avoid

Cooking spray or household oils in resin molds, which leave residue and spoil the surface
Heavy wet coats that pool in the detail

Questions

Do silicone molds need release for resin?

Not strictly, but release extends mold life, especially with urethane and epoxy resins.

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