10.1 Oz. Silicone Sealant, HVAC/REFRIGERATION Silicone

Rheem Protech 86-370A HVAC/R Silicone Sealant – Aluminum, 10.1 oz Cartridge

The Rheem Protech 86-370A HVAC/R Silicone Sealant is a professional-grade, one-part acetoxy cure adhesive formulated for general heating, ventilation, air conditioning, and refrigeration system applications. Designed for sealing and bonding a variety of construction and mechanical materials, this aluminum-colored sealant provides durable, weather-resistant adhesion to metal, glass, ceramics, certain plastics, and treated wood surfaces. The product cures to a flexible, resilient elastomeric bond capable of withstanding continuous mechanical vibration, thermal expansion, and environmental exposure common in HVAC installations.

Technical Specifications

• Manufacturer: Rheem / Protech
• Model Number: 86-370A
• Product Type: HVAC/R Silicone Sealant
• Container Type: Standard Cartridge Tube
• Volume: 10.1 oz (300 mL)
• Color: Aluminum
• Cure Type: One-Part Acetoxy Cure (Moisture-Cured)
• Drying Time: Approx. 20 minutes to skin formation (1/3 hour)
• Full Cure Time: 7 days (at 77°F / 50% RH)
• Consistency: Non-sag, paste-like compound
• Application Temperature Range: +40°F to +100°F (4°C to 38°C)
• Service Temperature Range: -60°F to +400°F (-51°C to +204°C)
• Adhesion Properties: Bonds to clean metal, glass, ceramics, many plastics, silicone resins, vulcanized silicone rubber, and many types of wood
• Recommended Substrate Preparation: Surfaces must be clean, dry, and free from contaminants; primer may be required for low-energy substrates
• Elongation: Excellent flexibility for dynamic joints and thermal movement
• Resistance: Moisture, ozone, and UV-resistant; non-corrosive to most metals
• Flammability: Non-flammable after curing
• Application Method: Applied via standard caulking gun
• Compliance: Meets professional-grade HVAC/R sealing standards

Performance and Application

The Rheem Protech 86-370A Silicone Sealant is engineered for use in demanding HVAC/R installations where mechanical integrity, thermal stability, and moisture resistance are critical. The acetoxy-cure formulation provides rapid initial tack and full cure in seven days, forming a tough, flexible seal that accommodates thermal expansion and vibration. This product adheres effectively to aluminum ductwork, galvanized steel, glass panels, ceramic surfaces, and most plastics used in system enclosures and assemblies. Suitable for sealing joints, flanges, electrical penetrations, and condenser housings, it maintains adhesion and elasticity in both interior and exterior environments. Primer use is recommended for certain difficult-to-bond materials.

Summary

The Rheem Protech 86-370A 10.1 oz Aluminum HVAC/R Silicone Sealant offers professional contractors a high-performance, acetoxy-cure adhesive designed for reliable sealing and bonding in HVAC and refrigeration systems. Its wide substrate compatibility, temperature resistance, and long-term flexibility make it a dependable solution for metal, glass, and composite applications across commercial and residential installations.