| Application Type | Sealer |
|---|---|
| 1 Part or 2 Part | 1 Part |
| Material Form | Liquid, Medium Paste |
| Substrate | Fiber, Aluminium, Elastomer, Rubber, Cold rolled Steel, Synthetic Rubber, Galvanized Steel, Painted Steel |
| Manufacturer | 3M |
| Chemistry | Isohexanes, Oil Soluble Elastomer, Synthetic Rubber |
| Cure Method | Solvent |
| Cure Time (min) | Fast |
| Viscosity (cPs) | 200,000 to 300,000 |
| Color | Gray |
For optimum adhesion, surfaces to be sealed must be clean, dry and free from oil, grease or other foreign material.
3M™Scotch-Seal™Duct Sealer 900 can be applied by hand or pressure caulking equipment, trowel, or spatula. Sealed surfaces should be mated as soon after application of the sealer as possible, preferably before the sealant has “skinned” over. If the sealant develops a “surface skin” prior to joining the sealed surfaces, care must be taken when mating the surfaces to ensure that the sealant surface is broken or ruptured in order to form a good, serviceable seal.
At 75°F (24°C), 40 mil wet films of Scotch-Seal 900 skin over or are tack free to the touch in approximately 15 minutes. The time required for thorough drying will vary with environmental conditions and sealant thickness. At 75°F (24°C), 40 mil wet films require about 48 hours to set to a firm rubber.
Equipment and tools can be cleaned with 3M™ Citrus Base Industrial Cleaner, 3M™ Scotch-Grip™ Solvent No. 2 or aliphatic type solvents.* This can best be accomplished by cleaning before the sealant has dried.
*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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| Set Time | Set Temperature |
|---|---|
| 2,880 min | 24°C |
| Tack Free Time | Tack Free Temperature |
|---|---|
| 15 min | 24°C |
| Viscosity | Test Method | Temperature |
|---|---|---|
| 200,000 to 300,000 cPs | Brookfield RVF, No. 7 sp. @ 10 rpm @ 80°F | 27°C |
| % Solids | Test Method |
|---|---|
| 66 % | By weight |
| 64 to 68 % | By weight |
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