ELASTOSIL® RT 625 A/B 1kg

ELASTOSIL® RT 625 A/B is a high-grade, two-component RTV-2 silicone designed for professional applications where high flexibility, excellent flowability, and precise detail reproduction are essential. Thanks to its low viscosity, the material easily fills even very complex geometries, making it an ideal choice for mold making, technical castings, prototyping, as well as electronic potting and encapsulation.

After curing, it forms a soft, highly elastic elastomer with a Shore A hardness of 25, retaining its full performance across a wide range of applications. It is distinguished by high tear resistance (27 N/mm), excellent mechanical strength, and minimal shrinkage, ensuring precise, stable reproduction of delicate details and long-term protection of technical components.

Thanks to its addition-curing chemistry, the silicone cures evenly and without significant internal stresses, making it particularly suitable for demanding molds, castings, and applications where precision and repeatability are critical. The material also exhibits very good resistance to environmental conditions, aging, and mechanical loads, significantly enhancing its durability in long-term use.

Key properties

• very good flowability — ideal for complex molds and castings

• soft elastomer after curing (Shore A 25)

• high tear resistance: 27 N/mm

• minimal shrinkage and excellent detail reproduction

• stable mechanical and environmental properties

• resistance to aging and dynamic loads

• addition-curing chemistry – fast and uniform curing

Applications
ELASTOSIL® RT 625 A/B is particularly recommended for:

• technical, prototype, and repeat-production molds

• fine-detail castings, decorative and technical components

• electronic potting and encapsulation, including mechanically sensitive electronics

• components exposed to frequent bending and movement

• applications requiring very soft and flexible elastomers

• production of components with complex geometries where consistent shape reproduction is essential

User benefits

• perfect detail reproduction due to softness and low viscosity

• durable protection of delicate components and electronics

• high mechanical resistance and low susceptibility to tearing

• fast, controlled curing in production processes

• long service life and stable properties over time

• an ideal balance between flexibility and mechanical strength