11 Oz. Heat Absorbing Paste

Nu-Calgon® Thermo-Trap® Heat Absorbing Paste – Technical Product Information

Nu-Calgon® Thermo-Trap® Heat Absorbing Paste (Part No. 4371-36) is a high-performance thermal control compound formulated to protect adjacent components and materials during soldering, brazing, or welding operations. Acting as a heat sink, Thermo-Trap® absorbs and dissipates heat to prevent unwanted temperature rise in sensitive components, fittings, or assemblies located near the work zone. The paste remains stable under high temperatures and can be applied directly to copper, steel, or other ferrous and nonferrous metals to isolate heat during thermal joining processes.

Technical Specifications

• Product Code: 4371-36
• Manufacturer: Nu-Calgon
• Product Name: Thermo-Trap® Heat Absorbing Paste
• Packaging Size: 11 oz Tube
• Physical Form: Viscous Paste
• Color: Gray to White
• Odor: Odorless
• Specific Gravity: 1.02
• Flammability Rating: 0 (Non-Flammable)
• Maximum Temperature Resistance: 1600°F (871°C)
• Thermal Function: Heat Sink – absorbs and redistributes localized heat
• Applicable Materials: Copper, Steel, and other common metal substrates
• Chemical Composition: Proprietary inorganic compounds in aqueous suspension
• Application Method: Apply directly with a spatula, brush, or gloved hand to areas requiring heat protection
• Cleanup: Remove with water after cooling
• Storage Temperature: Store in tightly sealed container at 40°F to 100°F (4°C to 38°C)
• Shelf Life: 24 months (unopened container)
• Compliance: Non-toxic; OSHA and EPA compliant for standard industrial use

Operational Characteristics

• Functions as a thermal barrier by absorbing and isolating localized heat sources
• Prevents heat migration to valves, gaskets, and temperature-sensitive assemblies
• Non-flammable and residue-free after removal
• Maintains physical integrity during heating up to 1600°F
• Ideal for plumbing, HVAC, refrigeration, and general metal fabrication applications

Professional Summary

Nu-Calgon® Thermo-Trap® Heat Absorbing Paste provides contractors and technicians with a reliable thermal management compound designed for high-temperature metal joining operations. Its high heat absorption capacity minimizes thermal transfer beyond the immediate work area, protecting adjacent fittings and heat-sensitive components during soldering or brazing. Thermo-Trap® maintains its consistency under extreme conditions, ensuring accurate application and dependable protection throughout the process. Engineered for field and shop use, it supports efficient, damage-free assembly in HVAC, plumbing, and industrial maintenance applications.