3M 7100039265 Instant Adhesive Primer AC79 1 Gallon

Product Description

The 3M 7100039265 is a California-compliant instant adhesive primer designed to prepare difficult-to-bond elastomeric surfaces for adhesive application. Sold as a colorless liquid in a 1-gallon container, AC79 primer is applied to elastomeric substrates before bonding with instant adhesives to improve adhesion where standard surface prep falls short. Adhesive technicians, industrial maintenance crews, and trade professionals use this primer when working with surfaces that resist direct bonding. It weighs 8.19 pounds per unit and is sold individually.

AC79 primer is intended for use on elastomeric substrates including silicone and EPDM rubber, as well as other elastomers that are inherently difficult to bond. Typical applications include gasket assembly, rubber component repair, and industrial maintenance scenarios where instant adhesive performance on low-surface-energy materials is required. The California-compliant formulation meets VOC regulations applicable in strict-compliance states, making it suitable for use in regulated work environments.

Key Features

• California-compliant VOC formulation for use in regulated environments
• Promotes adhesion on silicone, EPDM, and other difficult elastomeric surfaces
• Colorless formula leaves no visible residue on treated substrates
• Apply to each elastomeric surface prior to instant adhesive bonding
• 1-gallon container suitable for high-volume or shop use

Compatibility

Designed for use as a pre-treatment primer with instant adhesives on elastomeric substrates including silicone and EPDM rubber. Compatible with 3M Scotch-Weld instant adhesive product lines where elastomeric surface preparation is required.

Installation Notes

Apply primer to each elastomeric substrate surface and allow it to dry before applying the instant adhesive. Work in a well-ventilated area and follow all applicable safety data sheet guidance for solvent-based primers. Wear appropriate PPE including chemical-resistant gloves and eye protection during application. Store container tightly sealed when not in use to prevent evaporation and moisture contamination.

Technical Specifications

• Color: Colorless
• Container Size: 1 Gallon
• Weight: 8.19 pounds
• Compliance: California VOC Compliant
• UPC: 00051115313905

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100039265