3M 7100039252 Rubber Toughened Instant Adhesive RT3500B

Product Description

The 3M 7100039252 is a rubber toughened, high-viscosity, gap-filling instant adhesive sold under the Scotch-Weld RT3500B formulation in black, with a net weight of 1 pound per unit. It is engineered to maximize impact resistance, peel strength, and thermal cycling resistance while delivering tough, flexible bonds. The high viscosity allows it to fill gaps between mating surfaces rather than requiring tight, flush fits. Technicians and assembly professionals working with flexible or dissimilar substrates use this adhesive where a rigid cyanoacrylate would crack or fail under stress.

RT3500B is ideally suited for bonding flexible substrates and dissimilar materials, including rubber-to-metal, rubber-to-plastic, and similar mixed-material assemblies. It sees use in HVAC, refrigeration, and industrial maintenance applications where components are subject to vibration, thermal expansion, and repeated mechanical cycling. The flexible bond line accommodates movement that would delaminate a standard rigid adhesive, making it a practical choice for field repairs and production bonding alike.

Key Features

• Rubber-toughened formula provides flexible bonds that resist impact and peel forces
• High viscosity enables gap-filling on surfaces that are not perfectly flush
• Resists thermal cycling, making it suitable for environments with repeated heat and cold exposure
• Bonds dissimilar and flexible substrates where standard cyanoacrylates are not appropriate
• Black color for low-visibility bond lines on dark substrates

Compatibility

Designed for bonding flexible substrates and dissimilar materials such as rubber, plastics, and metals in maintenance, repair, and assembly applications.

Installation Notes

Surface preparation is critical for adhesive performance — clean and degrease both bonding surfaces before application. Apply with adequate ventilation; cyanoacrylate-based instant adhesives release vapors that can irritate eyes and respiratory passages. Use only the amount needed to cover the bond area, as excess adhesive does not improve strength. Store the container tightly sealed and away from heat sources when not in use.

Technical Specifications

• Formulation: Rubber Toughened Instant Adhesive
• Color: Black
• Viscosity Type: High Viscosity, Gap Filling
• Net Weight: 1 pound
• Package Weight: 1.22 pounds
• Unit of Measure: Each
• UPC: 00051115252006

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100039252