Our Fast-20 silicone rubber is amazing for most moulding and casting applications, it’s shore hardness of 20A means it is relatively soft whilst still being firm enough to hold good structure in all applications.
The quick setting time can also be incredibly useful when quick remoulding is required or when working times are not required.
- Very easy to use with 1:1 mixing ratio.
- Reproduce very fine details with ease.
- Incredibly quick cure time of 30 minutes
Mixing
Mixing Ratio: 1:1 by weight
Cures at room temperature (23 degrees C)
Working/Mixing time of 5-7 mins (be quick!)
Sets/cures in 30 minutes
Specifications
Platinum Addition Cure Silicone
Colour – Translucent
High tear strength
Temperature Resistant (-60 to 200 degrees C)
Skin Safe/Food grade (odourless and non-toxic)
Nil Shrinkage Rate (0.1%)
Shore Hardness – 20A
This is a coloured version of our Fast-20 Silicone Rubber, one part is white and one part is purple. This makes mixing simple and easy!
Fast Purple is amazing for most moulding and casting applications, including candle moulds and epoxy moulds. it is relatively soft whilst still being firm enough to hold good structure in all applications.
- Very easy to use with 1:1 mixing ratio.
- Reproduce very fine details with ease.
- Incredibly quick cure time of 30 minutes
Mixing
Mixing Ratio: 1:1 by weight
Cures at room temperature (23 degrees C)
Working/Mixing time of 5-7 mins (be quick!)
Sets/cures in 30 minutes
Specifications
Platinum Addition Cure Silicone
Colour – Purple!
High tear strength
Temperature Resistant (-60 to 200 degrees C)
Skin Safe/Food Grade (odourless and non-toxic)
Nil Shrinkage Rate (0.1%)
Shore Hardness – 20A
Faster set. Easier handling. Solid results.
Our reformulated TC20 is a reliable, cost-effective tin/condensation cure silicone rubber designed for everyday moulding and casting needs. With a balanced shore hardness of 20A, it's ideal for flexible, medium-firm moulds used in art, crafts, and prototyping.
Less sensitive to cure inhibition, TC20 works well with a wide range of materials—making it especially user-friendly for beginners and hobbyists.
Now with faster setting and smoother mixing. Catalyst included.
Key Features
Mix Ratio: 100:3 by weight (Base: Catalyst)
Working Time: 30 minutes at 23°C
Cure Time: 3–5 hours at room temperature
Minimal Shrinkage: ~0.3%
High Tear Strength
Temperature Range: -30°C to +120°C
Shore Hardness: 20A
Colour: White
Catalyst included
Tin Cure vs Platinum Cure
Tin cure silicones are more economical and faster to cure, with less sensitivity to contaminants that can inhibit curing—making them great for general use. However, platinum cure silicones offer greater mould life, higher precision, and options for food-safe applications. If you're after premium performance, especially for professional or high-detail projects, our platinum range is the better choice.
Use TC20 for fast, forgiving moulds where precision and longevity aren’t critical.
For professional, food-safe, or high-detail applications, our platinum cure silicones are the gold standard.