Recommended
Silicone casting rubber 1:1 Shore 15 (translucent)
At a glance
- Flexible silicone rubber
- Type: platinum cure
- Food-safe
Fast delivery throughout Europe
Secure payment with PayPal, Mastercard, Visa and more
4.7 out of 5 stars on Trusted Shops
Silicone Casting Rubber 1:1 Shore 15 (translucent) is a high-quality, semi-transparent silicone rubber for producing flexible moulds. Thanks to its simple 1:1 mixing ratio, the material is easy to measure, mix and process. The silicone rubber is strong, flexible and food-safe (independently tested by TÜV SÜD). Shore 15 Silicone Casting Rubber is ideal for producing semi-transparent moulds for use with epoxy.
Features of semi-transparent silicone casting rubber (Shore 15)
Unlike the blue version, this silicone casting rubber is translucent, giving the finished mould a semi-transparent appearance. Apart from its colour, this translucent silicone rubber has the same properties as the other RESION silicone casting rubbers. The material offers high tensile strength and excellent flexibility, making it highly tear-resistant and ensuring Shore A15 moulds have a long service life.
Once cured, the silicone rubber is resistant to epoxy resin, polyester and polyurethane casting resins, plaster, concrete and many other casting materials. It is also heat-resistant and exhibits virtually no shrinkage, resulting in durable, dimensionally stable moulds.
RESION Silicone Casting Rubber Shore A15 has been independently tested by TÜV SÜD for food safety and complies with European and German regulations for materials intended to come into contact with food (EC 1935/2004, EU 2025/40, Resolution AP(2004)5, LFGB and the BfR recommendations).
Benefits of Shore 15 silicone casting rubber
- Translucent colour (semi-transparent).
- High tensile strength.
- Flexible (Shore A15).
- Easy 1:1 mixing ratio.
Translucent silicone casting rubber is also available in a stiff Shore 40.
Processing silicone casting rubber
Silicone casting rubber is easy to use thanks to its simple 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.
- Mix both components thoroughly for approximately 3 minutes using a mixing spatula, taking care not to mix too vigorously. Be sure to scrape the sides and bottom of the mixing cup. Then pour the mixture into a clean mixing cup and mix thoroughly once more.
- The silicone casting rubber is now ready for use. The working time is approximately 45 minutes at the recommended processing temperature of 20°C (68°F). Higher temperatures accelerate curing and reduce the time for air bubbles to escape, while lower temperatures slow down the curing process.
- After approximately 8 hours, the silicone rubber is tack-free.
This silicone casting rubber can easily be converted into a brushable or spreadable silicone by adding silicone thickener.
Tip: want to make a coloured mould? Add approximately 0.2% silicone pigment to the silicone rubber!
Specifications
| Packaging | Base (SR1-15A-TL) | Curing agent (SR1-15B-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) |
Specific gravity: 1.02 kg/dm³
Hardness: Shore A15 (flexible)
Colour: Translucent (semi-transparent)
Food safe: Yes
Test certificate: TÜV SÜD Report No. 7216017173, dated 15 July 2026
Heat resistance: 200°C continuous, 300°C short-term
Working time: 45 minutes
Recommended processing temperature: 20°C (68°F)
Curing time: 8 hours (tack-free)
Shelf life: 2 years (unopened packaging)
Weight: 1 litre of silicone rubber weighs approximately 1 kg
Product properties
The key technical properties clearly listed in one place.
- Article number
- SIL001767
-
The technical product category, such as primer, resin, hardener or cleaner. It explains the product's purpose and helps you find other products with a similar function.
- Silicone casting rubber
-
Mixing ratio indicates how much of each component is needed, for example resin (A) and hardener (B). A ratio of 100:50 by weight means 100 grams of A to 50 grams of B; by volume you might use millilitres. Weight and volume ratios are not necessarily the same because the components may have different densities. Accurate measuring is important for proper curing.
- 1:1
-
The tasks a product is intended for, such as laminating, casting, bonding, sealing or protecting. Products intended for the same application can differ considerably in processing, curing time and final properties.
- Making molds (resin art)
- Colour
- Translucent
-
Hardness describes a material's resistance to indentation. For silicone rubber and other elastomers, the Shore A scale is commonly used: Shore A 15, for example, is softer than Shore A 40. Harder plastics may be rated on the Shore D scale. The number belongs to its Shore scale and is not a unit like MPa; values on different scales cannot be directly compared.
- Shore 15
-
Working time is the period during which a product remains workable after mixing or activation, usually given in minutes at a specified temperature, often 20 °C. With reactive resins, the chemical reaction also continues in the mixing container, and larger quantities or higher temperatures can shorten this time. Working time is different from gel time and full curing time.
- Approximately 45 minutes
-
The recommended application temperature range indicates the conditions under which the product can generally be applied and cured properly. Three temperatures matter:
- Air: the temperature in the workshop or outdoors.
- Substrate: the temperature of the surface being treated.
- Product: the temperature of the resin, adhesive or coating itself.
A cold substrate can cause condensation and affect adhesion. At higher temperatures, two-component products may react faster, reducing their working time. Check the dew point and follow the product instructions.
- 20 °C
-
Density describes the mass of a material per unit volume. Values may be given in g/cm³, kg/L or kg/m³; 1 g/cm³ equals 1 kg/L. For example, one litre of a liquid with a density of 1.2 kg/L weighs approximately 1.2 kg. Density helps convert between weight and volume, but it can vary with temperature.
- 1.02 kg/dm³
-
The period for which an unopened product remains usable under the specified storage conditions. Check whether the period starts from the manufacturing date or another date. Shelf life may be shorter after opening, especially for products sensitive to air or moisture.
- 24 months
-
A standard may specify how a product is tested or which requirements it must meet. Mentioning a standard does not automatically mean that the product has been officially certified.
- Tested to a standard: a particular test method was used.
- Complies with a standard: the available evidence indicates that the applicable requirements are met.
- Certified: a certificate or assessment document is available under a specific certification scheme.
Check which product version and application are covered, who carried out the assessment and whether the evidence is still valid. This is particularly important for protective equipment and other regulated applications.
- TÜV SÜD report no. 7216017173 dated 15 July 2026
- Net contents
- 20 kg, 2 kg, 6 kg
-
Food contact suitability means that a material may come into contact with food under specific, defined conditions. This suitability does not automatically extend to every application.
- Food type: for example water-based, acidic or fatty foods.
- Contact time and temperature: brief contact may have different requirements from long-term storage or contact with hot food.
- Processing: correct mixing ratio, full curing and any required post-curing may be conditions of approval.
A fully cured or odourless product is not automatically food-safe. Check the manufacturer's declaration or technical documentation for the permitted use.
- Yes
-
Heat resistance describes the temperature a material can withstand after correct processing and curing, usually expressed in degrees Celsius (°C). Continuous exposure is different from a brief temperature peak, and mechanical loading may also affect the limit. Heat resistance is not the same as the temperature at which the product can be applied.
- Up to 200 °C (short-term up to 300 °C)
Reviews
Frequently bought together
Useful additions for your project.
Popular
Popular
