CRAFT RESIN Mold Making Silicone 30A 8.8lb | Liquid Rubber For Molds
Craft Resin 8.8 lb 30A Casting Silicone is a firm, durable castable silicone rubber designed for large molds, repeat casting, and multiple mold-making projects. The Shore 30A hardness provides excellent shape retention and support, making it suitable for large trays, sculptures, decorative pieces, and molds with straighter walls. This two-part silicone rubber mixes at a simple 1:1 ratio, while the larger 8.8 lb size provides more material for bigger molds, multiple molds, workshops, and frequent mold-making projects.
- Easy 1:1 mix by weight - simple to measure, mix, and pour for smooth, consistent results with less mess and less guesswork.
- Low-viscosity formula - flows into details and helps reduce trapped bubbles for cleaner surfaces and more accurate molds.
- Firm 30A silicone for strong, shape-stable molds - ideal for projects that need more structure, better support, and dependable shape retention.
- High-detail reproduction - captures textures, edges, and fine features for clean, professional-looking results.
- Fast room-temperature cure - cures in around 4 hours, helping you move from mold making to casting faster.
- Low-odor formula - more comfortable to use indoors and versatile across a wide range of mold making applications.
- Ideal for resin, soap, candles, and DIY projects - a great choice for casting work where durability, detail, and repeated use matter.
The 4kg 2 part liquid silicone rubber is ideal for larger casting projects
No food-contact claim is made for this product, and we hold no food-contact test for it.
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Product specifications
Craft Resin Silicone is a platinum-cure RTV silicone designed for reliable mold making with smooth pouring, accurate detail capture, and easy demolding. The formula features a simple 1:1 mix by weight, cures in 3–5 hours at 77 °F, and is available in two hardness options to suit different mold types and casting needs.
Platinum-cure RTV silicone
1:1 by weight
Low-viscosity, low-bubble
Captures fine details, textures, and edges
Shore A 15 ± 2 (soft and flexible) / Shore A 30 ± 2 (firm and durable)
20–40 minutes
3–5 hours at 77 °F
≤ 0.1%
Easy release for detailed castings
Tear-resistant and reusable
Resin, soap, candles, plaster, concrete, and other casting projects
12 months
KEY BENEFITS OF CRAFT RESIN SILICONE RUBBER
Smooth, Bubble-Free Mold Surface
Low-viscosity liquid silicone rubber for mold making helps reduce trapped air and surface defects, creating smooth mold making silicone results without vacuum equipment.
Dry, Non-Tacky Finish After Cure
This 2 part liquid silicone cures into a clean, dry silicone mold surface that is ready for repeated casting and mold making projects.
Hard & Durable for Demolding
Shore 30A silicone for molds allows complex shapes to release smoothly, making it ideal silicone to make molds for resin, soap, wax and other detailed castings.
Accurate Detail Reproduction
Hard liquid silicone for mold making flows easily into fine textures and edges, delivering precise detail in silicone molds and resin casting molds.
Simple 1:1 Mixing Ratio
This mold making silicone kit features an easy 1:1 ratio by weight for simple measuring and consistent results.
Reusable Performance
Silicone rubber for mold making maintains flexibility and surface quality through multiple casting cycles, making it a reliable liquid silicone rubber for molds.
DESIGNED FOR VARIOUS MATERIALS
Craft with Confidence! Worry-Free.
If you’re not satisfied with our product, simply contact us and we’ll help. Damaged, defective or incorrect items are replaced free of charge; returns follow our Refund policy.
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