Wacker ELASTOSIL® RT 622 A/B is a high-performance addition-cure two-component room temperature vulcanizing (RTV-2) silicone rubber developed by Wacker Chemie AG. It is supplied as a two-part system (A component + B component with platinum catalyst) with a standard 1:1 mixing ratio by weight. After thorough mixing, it cures at room temperature into a flexible, low-hardness silicone elastomer without generating any volatile by-products during crosslinking. This material delivers outstanding mechanical properties including high tear strength, excellent elongation at break and ultra-low linear shrinkage. It also meets the strict requirements of EN 45545-2:2020 for railway industry fire protection, making it suitable for rolling stock applications. It is widely used as an all-round potting compound for electronic components, electrical coil slot exit potting, technical moldings and railway industry applications.

• Appearance: Reddish brown liquid

• Density (23°C): 1.13 g/cm³

• Viscosity (23°C): Up to 60000 mPa·s

• Working Life (23°C): 90 minutes

• Full Cure: 24 hours @23°C

• Shore A Hardness (Cured): 27

• Tensile Strength: 6.5 N/mm² (MPa)

• Tear Strength: 30 N/mm

• Elongation at Break: 550%

• Linear Shrinkage: < 0.1%

• Operating Temperature Range: -40 ℃ ~ +180 ℃

• Fire Resistance: Compliant with EN 45545-2:2020 (Hazard Level HL1 R22, HL1/HL2 R23/R24)

• Excellent mechanical properties with high tear strength and superior elongation at break

• Low hardness cured silicone provides outstanding flexibility and elastic recovery

• Ultra-low linear shrinkage (<0.1%) ensures="" high="" dimensional="" accuracy="" of="" cured="" parts="">

• Addition cure system produces no by-products during curing, no shrinkage or deformation

• Good flowability for easy pouring and potting of complex shapes and narrow gaps

• Compliant with EN 45545-2 fire protection standards for railway industry applications

• Wide operating temperature range with reliable heat resistance and cold resistance

• Low toxicity and stable chemical properties for long-term service life

• Suitable for room temperature curing, no need for high-temperature ovens

• All-round potting compound for electronic components and electrical assemblies

• Slot exit potting for electrical coils and transformers

• Technical moldings and custom silicone parts manufacturing

• Railway industry applications compliant with EN 45545-2 fire safety standards

• Hydroelectric power plant electrical component encapsulation

• Automotive and transportation electronic system protection

• Lighting industry electrical component sealing and encapsulation