RTV159 - Red (90gm Tube)
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Momentive SNAPSIL™ RTV159 (Red) – High-Strength, High-Temperature Paste Silicone Adhesive Sealant
SNAPSIL™ RTV159 is a red, one-component, ready-to-use, high-strength silicone adhesive sealant that cures at room temperature upon exposure to atmospheric moisture, forming a tough, resilient silicone rubber. Engineered for the most demanding industrial applications, RTV159 delivers exceptional tensile strength (1,025 psi), high tear resistance (95 pli), and outstanding performance at elevated temperatures, making it ideal for structural bonding, high-stress gasketing, and thermal environments where reliability is critical.
RTV159 features a paste consistency, allowing it to be applied cleanly to horizontal, vertical, and overhead surfaces without slumping. During curing, it releases acetic acid vapours, so it should not be used in contact with acid-sensitive metals such as copper or brass.
Due to its moisture-cure chemistry, RTV159 must not be applied in thicknesses greater than 6 mm (¼ inch). For deeper sections, Momentive Performance Materials recommends one-component addition-cure or two-component silicone rubber compounds with similar performance characteristics.
Key Features
- Ultra-high mechanical strength:
- Tensile strength: 1,025 psi
- Tear strength: 95 pli
- Elongation: 825% for flexibility under thermal cycling and vibration
- High-temperature performance:
- Continuous use up to 260°C (500°F)
- Intermittent exposure up to 315°C (600°F)
- Paste consistency – Stays in place on vertical and overhead surfaces (up to 6 mm / ¼ in. thick)
- Room-temperature moisture cure – No mixing or heat required
- Excellent adhesion to metals, glass, ceramics, and many plastics without primer
- Superior electrical insulation, weatherability, and ozone/chemical resistance
- Shore A hardness: 28 – balances durability with flexibility
Typical Applications
- Structural bonding in aerospace, transportation, and heavy industrial equipment
- High-stress formed-in-place gaskets for engines, pumps, and gear housings
- Electrical potting and encapsulation require high mechanical and thermal performance
- Applications exposed to extreme thermal cycling, vibration, or mechanical load
Certifications & Compliance
- UL Recognised (File No. E-36952)
- FDA Compliant: Meets 21 CFR 177.2600 for repeated food contact
- USDA Approved for use in meat and poultry processing equipment
- NSF/ANSI Standard 51 Certified for food equipment applications
Technical Notes
- Maximum recommended cure thickness: 6 mm (¼ inch)
- Releases acetic acid during cure—avoid use with copper, brass, or other acid-sensitive metals
- Tack-free time: ~45 minutes at 25°C (77°F) and 50% RH
- Full cure (3 mm thickness): ~24 hours; full bond strength develops in 7 days
- Dielectric strength: 500 V/mil
Packaging Options
- Available in tube
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Momentive SNAPSIL™ RTV159 (Red) – High-Strength, High-Temperature Paste Silicone Adhesive Sealant
SNAPSIL™ RTV159 is a red, one-component, ready-to-use, high-strength silicone adhesive sealant that cures at room temperature upon exposure to atmospheric moisture, forming a tough, resilient silicone rubber. Engineered for the most demanding industrial applications, RTV159 delivers exceptional tensile strength (1,025 psi), high tear resistance (95 pli), and outstanding performance at elevated temperatures, making it ideal for structural bonding, high-stress gasketing, and thermal environments where reliability is critical.
RTV159 features a paste consistency, allowing it to be applied cleanly to horizontal, vertical, and overhead surfaces without slumping. During curing, it releases acetic acid vapours, so it should not be used in contact with acid-sensitive metals such as copper or brass.
Due to its moisture-cure chemistry, RTV159 must not be applied in thicknesses greater than 6 mm (¼ inch). For deeper sections, Momentive Performance Materials recommends one-component addition-cure or two-component silicone rubber compounds with similar performance characteristics.