3M Duct Sealer 900

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Description for 3M Duct Sealer 900

Firm, rubbery with gap filling properties • Economical for HVAC ducts

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

Best Practices for 3M Duct Sealer 900

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Technical Data for 3M Duct Sealer 900

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Overview

Application Type
- Sealant - Sealer
1 Part or 2 Part
- 1-Part
Material Form
- Elastomer - Oil Soluble Elastomer
- Liquid
- Paste - Medium Paste
Substrate
- Glass - Fiber
- Metal - Aluminium
- Steel - Cold rolled Steel, Painted Steel
- Galvanized - Galvanized Steel
- Plastic - Elastomer
- Rubber - Synthetic Rubber
- Galvanized Steel
Industry
- Electronics
- Industrial - Air Conditioning Ducts
- Construction - Ducts, Heating Ducts
Chemistry
- Synthetic Rubber
- Other - Isohexanes, Oil Soluble Elastomer
Application Method
- Dispenser - Application equipment
- Flow - Flow equipment
- Spatula/Trowel - Spatula, Trowel
Cure Method
- Solvent
Color
- Gray

Specifications

Cure Specs

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

Hardness

Flexibility	Firm

Other Properties

Flash Point (°F)	1.4
% Solids (%)	66, 64 to 68	Test Method

Business Information

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

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1. Surface Preparation
  
  For optimum adhesion, surfaces to be sealed must be clean, dry and free from oil, grease or other foreign material.
2. Application
  
  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.
3. Curing
  
  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.
4. Clean-Up
  
  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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