3M 7100084538 Scotch-weld Epoxy Adhesive 125 Gray Part B

Product Description

The 3M 7100084538 is the Base (Part B) component of the Scotch-Weld Epoxy Adhesive 125 two-part epoxy system, supplied in a 5-gallon container. This fast-setting, medium-viscosity adhesive uses a 1:1 mix ratio with a 25-minute work life and reaches handling strength in approximately 2.5 hours. The cured adhesive is gray in color and notably flexible, making it well suited for assemblies that experience vibration, thermal cycling, or minor structural movement. It is installed by industrial maintenance technicians, fabricators, and trade professionals working with bonded assemblies across a range of substrates.

Scotch-Weld Epoxy Adhesive 125 Part B is used in industrial, commercial, and light manufacturing applications where a reliable, flexible epoxy bond is required. The medium viscosity allows for easy pouring and metering, which suits bulk mixing operations and production-line bonding scenarios. Compatible substrates include metals, glass, ceramics, wood, and many plastics, broadening its use across fabrication, repair, and maintenance workflows. This container supplies the Base component only and must be paired with the corresponding Part A to form the complete adhesive system.

Key Features

• 1:1 mix ratio simplifies metering and reduces waste during application
• 25-minute work life allows time for part positioning and fixturing
• Handling strength reached in approximately 2.5 hours after mixing
• Medium viscosity supports easy pouring and bulk dispensing
• Flexible cured bond resists vibration and movement in assembled joints
• Bonds to metals, glass, ceramics, wood, and many plastics

Compatibility

This is the Base (Part B) component of the Scotch-Weld Epoxy Adhesive 125 B/A system. It must be used with the corresponding Part A at a 1:1 mix ratio. Suitable for bonding metals, glass, ceramics, wood, and many plastics in industrial and commercial maintenance or fabrication applications.

Installation Notes

Mixing and application should be performed by personnel familiar with two-part epoxy systems and applicable workplace safety requirements. Ensure both Part A and Part B are at the recommended application temperature before mixing, and consult the product technical data sheet for surface preparation requirements. Mix only the quantity that can be applied within the 25-minute work life. Wear appropriate personal protective equipment, including chemical-resistant gloves and eye protection, when handling uncured epoxy components.

Technical Specifications

• Mix Ratio: 1:1 (B/A)
• Work Life: 25 minutes
• Handling Strength: Approximately 2.5 hours
• Color (Cured): Gray
• Viscosity: Medium
• Container Size: 5 gallon
• Component: Part B (Base)
• Weight: 11.6 pounds
• UPC: 00021200872174

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100084538