Craft Resin Silicone Mould Making Kit 3.79 L — Fast-Curing Shore 30A, Translucent Low-Odour

Craft Resin Fast-Curing Firm Silicone Mould Making Kit is a 1-gallon, translucent, platinum-cure silicone formulated at Shore 30A for firm, stable moulds that capture fine detail and maintain straight edges for coasters, trays, and deep pours.

This one-gallon kit is designed for makers who need a balance of strength and detail — firmer than soft silicones yet still capable of reproducing intricate textures. The translucent, low-odour platinum formulation cures at room temperature in about four hours and mixes easily 1:1 by weight. Because it’s low-bubble and self-releasing, you can often skip vacuum degassing; once cured it peels cleanly away from objects and is food safe when fully set.

How long does it take to mix and cure before you can demold?

Mixing is quick: weigh equal parts of Part A and Part B, blend thoroughly, and pour. The formula cures at room temperature to handling strength in approximately four hours, with full cure depending on ambient conditions and pour thickness.

• Mix ratio 1:1 by weight for accurate cures
• Ready to demold in about 4 hours at standard room temperature
• Cure time may extend with thicker pours or lower temperatures
• No heat or special curing equipment required

Will this silicone hold sharp edges and tall walls for trays and coasters?

Yes — at Shore 30A this silicone is firm enough to keep walls upright and flat surfaces true during demolding. That firmer durometer prevents deformation common with softer rubbers, making it a reliable choice for items that must retain precise shapes.

• Firm Shore 30A maintains straight, vertical walls and flat bottoms
• Suitable for tall moulds, multi-part moulds, and stacked casts
• Minimal shrinkage helps retain dimensional accuracy
• Translucent mix helps you monitor flow and bubble formation

What materials and projects are compatible with this mould silicone?

The platinum-cure formula bonds to many textures without inhibition once cured, making it usable for resin, wax, soap, plaster and many casting media. Its low-odour, non-toxic characteristics make it comfortable to work with indoors for longer sessions, and when fully cured the rubber is food safe for items like biscuit cutter and serving trays.

• Works with epoxy and polyester resins, candle wax, soap bases, and plaster
• Good for miniatures, layered candles, detailed soaps, and decorative trays
• Translucent working state shows trapped air so you can address bubbles
• Peels back from textured masters without tearing or sticking

Do I need vacuum or pressure equipment to get bubble-free moulds?

The kit is formulated to minimize trapped air and often releases bubbles on its own, reducing the need for a vacuum chamber. For highly detailed pieces with extreme undercuts, vacuum or pressure degassing can still improve results, but many common projects come out clean without extra tools.

• Low-bubble formula reduces reliance on vacuums for most pours
• Translucency helps you see and address bubbles while pouring
• Optional vacuum or pressure recommended for ultra-fine detail work
• Suitable for room-temperature pours — no complex processing required

Who is this for: This 1-gallon Craft Resin Shore 30A silicone kit is ideal for hobbyists, independent makers, and small studios that need a dependable, firmer mould rubber for trays, coasters, and taller or deeper castings. Choose it if you want fast cures, clear working viscosity to spot bubbles, and a durable mould that still captures fine surface detail. If you routinely cast ultra-fine jewellery or require the softest reproduction for flexible forms, a softer Shore may be preferable; otherwise this kit offers a strong, multi-use solution for a wide range of DIY and small-scale production projects.