3M 7000000853 Scotch-weld Epoxy Adhesive 420NS Black Base B 5 Gal

Product Description

The 3M 7000000853 is the Base (Part B) component of the Scotch-Weld Epoxy Adhesive 420NS two-part, non-sag epoxy system, supplied in a 5-gallon container. This toughened epoxy is designed for structural bonding applications where a black, non-sagging adhesive is required on vertical or overhead surfaces. It operates on a 2:1 mix ratio with its corresponding Part A hardener and delivers a 20-minute work life after mixing. Handling strength is reached in approximately 2 hours. Licensed trade professionals and industrial adhesive technicians typically use this product in fabrication, assembly, and repair operations requiring high-performance bonding.

This adhesive is suited for applications in metal fabrication, woodworking, ceramics bonding, and select plastic assemblies where strong shear and peel resistance is required. The non-sag formulation makes it appropriate for gap-filling on non-horizontal surfaces. It is commonly used in both light industrial and commercial settings where a durable, impact-resistant bond is needed across dissimilar materials. The 5-gallon container size is intended for production-volume or repeated service applications rather than single-use jobs.

Key Features

• Two-part epoxy system — Part B (Base) requiring 2:1 mix ratio with Part A hardener
• Non-sag formulation supports use on vertical and overhead surfaces
• 20-minute work life after mixing allows time for part positioning and adjustment
• Handling strength achieved in approximately 2 hours
• Bonds to metals, ceramics, wood, and select plastics
• Good shear strength, peel strength, and impact resistance

Compatibility

Designed for use as the Base (Part B) component in the 3M Scotch-Weld Epoxy Adhesive 420NS B/A two-part system. Must be paired with the corresponding Part A hardener at a 2:1 mix ratio to achieve rated bond performance.

Installation Notes

Mixing and application of two-part structural epoxy adhesives should be performed by personnel familiar with epoxy handling procedures and applicable safety data sheet requirements. Surfaces must be clean, dry, and free of oils or contaminants before adhesive application. Follow the manufacturer's mixing ratio precisely — incorrect ratios will impair cure and bond strength. Ensure adequate ventilation during mixing and application as required by local safety regulations.

Technical Specifications

• Mix Ratio: 2:1 (B to A)
• Work Life: 20 minutes
• Handling Strength: 2 hours
• Color: Black
• Component: Part B (Base)
• Container Size: 5 Gallon
• Weight: 9.1 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 5
• UPC: 00021200565878

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000853