| Application Type | Bond |
|---|---|
| 1 Part or 2 Part | 1 Part |
| Material Form | Liquid, Buttery mastic |
| Substrate | FRP, Plastic, Steel, HardWoods, Concrete, Polystyrene, PlyWood |
| Manufacturer | 3M |
| Chemistry | Isohexanes, Synthetic Rubber |
| Cure Method | Solvent |
| Viscosity (cPs) | 200,000 to 300,000 |
| Color | Gray |
| Chemical Resistance | Water |
| Other Resistance | Dead load creep |
For optimum bond strength, the substrates should be cleaned of loose dirt and debris.
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.
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.
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| Viscosity | Test Method | Temperature |
|---|---|---|
| 200,000 to 300,000 cPs | Brookfield #7 @ 10 RPM’s @ 80°F 27°C | 27°C |
| Shear Strength | Type | Cure Time | Test Temperature | Test Humidity | Test Method |
|---|---|---|---|---|---|
| 66 psi | Overlap shear strength | 60 min | 25°C | 50 % | Rate of strength buildup testing: Rate of strength buildup test results were run on fir to fir, 1/4 in. exterior grade plywood, overlap shear bonds at 77°F (25°C) at 50% relative humidity. Bonds were tested on a tensile tester using a jaw separation speed of 2 inches per minute., Cohesive failure |
| 124 psi | Overlap shear strength | 120 min | 25°C | 50 % | Rate of strength buildup testing: Rate of strength buildup test results were run on fir to fir, 1/4 in. exterior grade plywood, overlap shear bonds at 77°F (25°C) at 50% relative humidity. Bonds were tested on a tensile tester using a jaw separation speed of 2 inches per minute., Cohesive failure |
| 183 psi | Overlap shear strength | 240 min | 25°C | 50 % | Rate of strength buildup testing: Rate of strength buildup test results were run on fir to fir, 1/4 in. exterior grade plywood, overlap shear bonds at 77°F (25°C) at 50% relative humidity. Bonds were tested on a tensile tester using a jaw separation speed of 2 inches per minute., Cohesive failure |
| 178 psi | Overlap shear strength | 360 min | 25°C | 50 % | Rate of strength buildup testing: Rate of strength buildup test results were run on fir to fir, 1/4 in. exterior grade plywood, overlap shear bonds at 77°F (25°C) at 50% relative humidity. Bonds were tested on a tensile tester using a jaw separation speed of 2 inches per minute., Cohesive failure |
| 291 psi | Overlap shear strength | 1,440 min | 25°C | 50 % | Rate of strength buildup testing: Rate of strength buildup test results were run on fir to fir, 1/4 in. exterior grade plywood, overlap shear bonds at 77°F (25°C) at 50% relative humidity. Bonds were tested on a tensile tester using a jaw separation speed of 2 inches per minute., Wood failure, Bond strength of the mastic beyond the limits of the substrate strength. |
| 290 psi | Overlap shear strength | 2,880 min | 25°C | 50 % | Rate of strength buildup testing: Rate of strength buildup test results were run on fir to fir, 1/4 in. exterior grade plywood, overlap shear bonds at 77°F (25°C) at 50% relative humidity. Bonds were tested on a tensile tester using a jaw separation speed of 2 inches per minute., Wood failure, Bond strength of the mastic beyond the limits of the substrate strength. |
| 290 psi | Overlap shear strength | 10,080 min | 25°C | 50 % | Rate of strength buildup testing: Rate of strength buildup test results were run on fir to fir, 1/4 in. exterior grade plywood, overlap shear bonds at 77°F (25°C) at 50% relative humidity. Bonds were tested on a tensile tester using a jaw separation speed of 2 inches per minute., Wood failure, Bond strength of the mastic beyond the limits of the substrate strength. |
| Flash Point | Test Method |
|---|---|
| 1.4°F | Setaflash |
| % Solids | Test Method |
|---|---|
| 66 % | By weight |
| 64 to 68 % | By weight |
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