Application Type Sealer 1 Part or 2 Part 1 Part Material Form Liquid, Medium Paste, Oil Soluble Elastomer Substrate Fiber, Aluminium, Elastomer, Rubber, Cold rolled Steel, Galvanized Steel, Galvanized Steel, Synthetic Rubber, Painted Steel Industry Electronics Manufacturer 3M Chemistry Isohexanes, Synthetic Rubber, Oil Soluble Elastomer Application Method Spatula, Trowel Cure Method Solvent Cure Time (min) Fast Viscosity (cPs) 200,000 to 300,000 Color Gray
Technical Data for 3M Duct Sealer 900
- Sealant - Sealer
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- Elastomer - Oil Soluble Elastomer
- Paste - Medium Paste
- Synthetic Rubber
- Other - Isohexanes, Oil Soluble Elastomer
- Dispenser - Application equipment
- Flow - Flow equipment
- Spatula/Trowel - Spatula, Trowel
Cure Time (min) Fast Viscosity (cPs) 200,000 to 300,000 Test Method Set Time (min) 2,880 Test Method Tack Free Time (min) 15 Test Method
Flash Point (°F) 1.4 % Solids (%) 66, 64 to 68 Test Method
Shelf Life Details Store product at 60-80°F (16-27°C) for maximum storage life. Higher temperatures reduce normal storage life. Lower temperatures cause increased viscosity of a temporary nature. Rotate stock on a “first in-first out” basis. When stored at recommended temperatures in original unopened container, this product has a shelf life of 15 months from the date 3M ships the product to a customer or distributor. Shelf Life Temperature (°F) 61 to 81 Shelf Life Type from the date 3M ships Shelf Life (mon) 15
Best Practices for 3M Duct Sealer 900
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 Test Methods
|Set Time||Set Temperature|
Tack Free Time Test Methods
|Tack Free Time||Tack Free Temperature|
Viscosity Test Methods
|200,000 to 300,000 cPs||Brookfield RVF, No. 7 sp. @ 10 rpm @ 80°F||27°C|
% Solids Test Methods
|% Solids||Test Method|
|66 %||By weight|
|64 to 68 %||By weight|