3M 7000000907 Scotch-weld Metal Primer 3901 Red 1/2 Pint

Product Description

The 3M 7000000907 Scotch-Weld Metal Primer 3901 is a red-pigmented adhesion primer formulated to improve bond performance of Scotch-Weld film and liquid adhesives on metal and glass substrates. Supplied in a 1/2 pint container, this primer works with epoxy and urethane adhesive systems to increase resistance to environmental exposure, including moisture, temperature cycling, and chemical contact. It is applied to prepared surfaces prior to adhesive bonding and is used by fabricators, maintenance technicians, HVAC sheet metal workers, and industrial assembly professionals who require reliable, long-term adhesion on metal components.

Scotch-Weld Metal Primer 3901 is intended for use in applications where improved adhesion to metal and glass is required, particularly when bonding with 3M Scotch-Weld film adhesives or liquid epoxy and urethane adhesives. It is suited for both production assembly and maintenance repair environments where environmental durability of the bond is a priority. The 1/2 pint size is appropriate for small-batch or field use.

Key Features

• Formulated specifically for use with 3M Scotch-Weld film and liquid adhesive systems
• Improves resistance to environmental exposure when used with epoxy and urethane adhesives
• Promotes adhesion to metal and glass substrates
• Red pigmentation allows visual confirmation of primer coverage
• Compact 1/2 pint container suited for field repairs and small-batch assembly

Compatibility

Designed for use with 3M Scotch-Weld film and liquid adhesives, including epoxy and urethane adhesive systems, where improved metal and glass adhesion is required.

Installation Notes

Apply to clean, dry, degreased metal or glass surfaces before bonding. Allow the primer to fully dry before applying the adhesive, following the adhesive manufacturer's open time and cure guidelines. Use in a well-ventilated area and follow applicable safety data sheet requirements for solvent-based primers. Wear appropriate PPE including chemical-resistant gloves and eye protection during application.

Technical Specifications

• Color: Red
• Container Size: 1/2 Pint
• Weight: 0.54 pounds
• UPC: 00021200210877

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000907