3M Construction Mastic 4323

Surface Preparation

For optimum bond strength, the substrates should be cleaned of loose dirt and debris.

Application

3MTM Scotch-GripTM Construction Mastic 4323 is ready for use as received with no mixing or dilution required. The adhesive can be applied from cartridges using hand caulking guns or pneumatic caulk or pump equipment. The mastic is also available in bulk where simple spatulas or notched trowels can be used to apply product. A 1/4 inch diameter bead when applied to one surface will have a bonding range of approximately 15 minutes at 72°F (22°C) / 50% R.H. The mastic is usually applied to one of the bonding surfaces, although it may be applied to both surfaces in some applications. Green strength and the rate of strength buildup develops more rapidly in a dry, hot environment and more slowly as the humidity increases and/or the temperature drops.

Clean-Up

Cleanup can be accomplished by removing the excess mastic with a spatula or similar tool. The remainder of the mastic can be wiped off using 3M™ Citrus Base Industrial Cleaner, 3M™ Scotch-Grip™ Solvent No. 2, mineral spirits or acetone soaked rag.* This should be done before the mastic dries. Dried mastic can be cut off with a sharp tool such as a razor blade or utility knife.

*Note: When using solvents, extinguish all ignition sources, including pilot lights, and follow the manufacturer’s precautions and directions for use.