These two-part (Part A & Part B), room temperature curing rubbers offer great flexibility, tear strength, chemical resistance, and release properties. Silicone molds can be used to cast a variety of materials.
Typical Casting Materials
- Resin (polyurethane, polyester, epoxy)
- Low melting metals
If cast resin parts need to be painted, silicone mold rubbers are often preferred as release agent is not necessary. Release agent, which is needed when casting resin in polyurethane rubber molds, must be washed off prior to painting and can be difficult to remove.
Silicone mold rubbers are more expensive than polyurethane rubbers, but well worth the expense when high-volume resin casting is required.
- Platinum Silicone Rubber (PlatSil 71 Series) used for Polyurethane Resin and Polyurethane Foam Casting including Moulds for Cold Cast Bronze Arts with EasyFlo Binders
- Mid-Range Hardness High Performance Silicone (PlatSil 73 Series) used for Moulds for Resin and Foam Casting, Plaster Casting, Art Foundry Wax Casting, Sculpture & Deocr Reproduction etc.
- TinSil Tin Silicone Rubber with Shore Hardness A10 to A60 (TinSil 70 & TinSil 80 Series) used as Moulds for Casting Resins like Polyester, Polyurethane, Epoxy as well as Polyurethane Foam and Low Melting Metals
Platinum Silicone Rubbers
|PlatSil® 71-Series||8 individual product options. Shore A10 to A40 hardness range. Includes one translucent rubber option. 1A:1B, 1A:10B, and 1A:5B mixes available. Demold times ranging from 30 minutes to 24 hours. SiliGlass (a rubber that shatters like glass – for spfx) & SiliFoam (a soft, silicone foam) are included in this series.|
|PlatSil® 73-Series||7 individual product options. Shore A15 to A60 hardness range. Includes two translucent rubber options. 1A:1B and 1A:10B mixes available. Demold times ranging from 1 hour to 16 hours.|
Tin Silicone Rubbers
|TinSil® 70-Series||6 individual product options. Shore A10 to A60 hardness range. Includes two translucent rubber options. 1A:10B, 2A:100B, and 5A:100B mixes available. Demold times ranging from 16 hours to 24 hours. TinSil Brush/Spray 25 (a self-thickening rubber) and TinSil 70-60 (suitable for casting low-melt metals) are included in this series.|
|TinSil® 80-Series||3 individual product options. Shore A15, A30 & A40 hardness options. Only 1A:10B mixes available. 24 hour demold times. 80-Series rubbers have a longer library life than 70-Series rubbers.|