Silicone casting rubber 1:1 Shore 40 (translucent)
- Hard silicone rubber
- Type: platinum cure
- For concrete moulds
Silicone casting rubber Shore A40 is the stiffest semi-transparent silicone casting rubber in our range. This hard silicone rubber is translucent (semi-transparent) and is ideal for producing large moulds that require excellent structural strength. As a result, it is the preferred choice for moulds used to cast concrete, tin or copper.
RESION silicone casting rubber features a simple 1:1 mixing ratio, making measuring and mixing quick and easy.
Features of translucent silicone casting rubber Shore 40
Unlike the black version, this silicone casting rubber is translucent, giving the finished mould a semi-transparent appearance. Apart from its colour, this translucent silicone casting rubber offers the same properties as the other RESION silicone casting rubbers. The material combines high tensile strength with limited flexibility and moderate elasticity. As a result, moulds made from Shore A40 silicone casting rubber have a long service life and reproduce fine details with outstanding accuracy.
Once cured, the silicone rubber offers excellent resistance to polyester casting resins, polyurethane casting resins, plaster, concrete and many other casting materials. In addition, it is highly heat-resistant and exhibits minimal shrinkage.
Benefits of translucent silicone casting rubber Shore 40
- Translucent in colour (semi-transparent).
- High tensile strength.
- Rigid (Shore 40).
- Easy 1:1 mixing ratio.
Directions for use
Silicone casting rubber is easy to use thanks to its 1:1 mixing ratio. Follow the steps below for the best results.
- Accurately weigh the base (Component A) and curing agent (Component B) using a scale in a 1:1 mixing ratio.
- Thoroughly mix both components for approximately 3 minutes using a mixing spatula. Avoid mixing too vigorously. Be sure to scrape the sides and bottom of the mixing cup thoroughly. Then pour the mixture into a clean mixing cup and mix again until fully homogeneous.
- The silicone casting rubber is now ready for use. The working time is approximately 45 minutes and the recommended processing temperature is 20 °C. At higher temperatures, curing will occur more quickly, giving trapped air bubbles less time to escape. At lower temperatures, the curing process will be slower.
- After approximately 8 hours, the silicone casting rubber will be tack-free.
This silicone casting rubber can easily be converted into a brushable or spreadable silicone by adding a few percent of silicone thickening agent.
Specifications
| Set | Base (SR1-40A-TL) | Curing agent (SR1-40B-TL) |
| 2 kg | 1 kg | 1 kg |
| 6 kg | 3 kg | 3 kg |
| 20 kg | 10 kg | 10 kg |
| 200 kg | 100 kg (10 x 10 kg) | 100 kg (10 x 10 kg) |
| 400 kg | 200 kg (drum) | 200 kg (drum) |
Type: Platinum-cure RTV-2
Hardness: Shore A40 (hard)
Mixing ratio: 1:1
Colour: Translucent (semi-transparent)
Specific gravity: 1.02 kg/dm³ (1 kg ≈ 1 litre)
Working time: Approx. 45 minutes at 20 °C
Curing time: Approx. 8 hours (tack-free)
Temperature resistance: 200 °C continuous / 300 °C short-term
Food-safe: Yes
Shelf life: 2 years (unopened packaging)
We have a number of recommendations for working safely with polymers. At Polyestershoppen you will not only find the polymers themselves, but you can also purchase all the protective equipment you need from us. If you have any doubts or questions, please contact our customer service. We can give you advice on how to work safely with polymers.
