Silconic Stensil ECO 50 Yellow – Kneadable Platinum Silicone for Mould Making & Dental Technology

Premium Medium-Hard Kneadable Silicone for Professional Mould Making and Dental Technology Applications

Stensil ECO 50 Yellow is a two-component, platinum-cure (addition-cure) kneadable silicone (Shore A 50) that cures at room temperature. The bright yellow putty is simply mixed by hand in a 1:1 ratio by weight and, with a pot life of 1.5 minutes and a demoulding time of 5 minutes, offers a good balance between working time and production speed. Its Shore A 50 hardness makes this grade ideally suited to mould making, dental technology, model making and industrial reproduction, where both fine detail and durability matter.

Key Benefits

• Shore A 50 – medium hardness offering an excellent balance between flexibility for undercuts and firmness for repeated use.
• Demoulding time 5 minutes – fast cure at 20°C for efficient production cycles.
• Shrinkage <0.1% – dimensionally accurate reproductions without distortion in precision applications.
• Density 1.63 g/cm³ – stable putty that does not slump on vertical or overhanging surfaces.
• 1:1 mix ratio by weight – easy hand mixing without mixing equipment.
• Chemical resistance – reasonably resistant to acidic and more aggressive substances.

Typical Applications

• Mould making – reusable production moulds for medium-hard, highly detailed reproductions.
• Dental technology – check bites, silicone keys and study models.
• Model making & prototyping – moulds for technical parts with good dimensional accuracy.
• Jewellery & goldsmithing – sturdy moulds for repeated production of metal or resin models.
• Restoration & reproduction – copies of ornaments and historical details.
• Industrial production – small-batch production of dimensionally stable impressions.

Processing Instructions:

1. Take equal parts by weight of components A and B (1:1).
2. Knead both components together thoroughly with clean hands until a uniform yellow colour is obtained.
3. Use the mixed putty within the pot life of 1.5 minutes.
4. Press the silicone over or around the model and wait 5 minutes at 20°C.
5. Demould once the silicone has fully cured and no longer feels tacky.
6. Full strength is reached after 24 hours.

Addition-cure silicone warning: Stensil ECO is a platinum-cure silicone whose catalyst can be poisoned by sulphur, nitrogen, amine compounds and metal salts (cure inhibition). These substances are found in, among other things, many latex gloves, some plasticines, varnishes, adhesives, condensation-cure silicones, one-component silicone sealants, natural rubbers and 3D printing materials (especially stereolithography/SLA). If in doubt, test on a small area first or apply a protective layer of polyvinyl alcohol.

Silconic GmbH & Co. KG is a German manufacturer of high-quality silicone elastomers with production in Lonsee. Since 2004, the company has been developing dental silicones under its own brands and is one of Europe's leading producers of RTV-2 silicones.

Professional Support

Unsure whether Shore A 50 is the right choice for your mould application? Our technical team will gladly help you compare it with the softer Stensil ECO 30 or the harder Stensil ECO 70. Get in touch via our website.