Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Product Highlights
- Foster® Safetee™ Duct Sealant 32-17 is a fire-resistive, fibrated, water-based, indoor/outdoor vapor barrier sealant for low, medium and high velocity heating and air conditioning ducts.
- It performs as a tough and flexible adhesive and sealant, forming a durable seal against air leakage when used with or without reinforcing tape or membrane.
- Mechanical fasteners of the type and number normally used for duct assemblies are required to provide rigidity to the duct system.
- Foster® Safetee™ Duct Sealant 32-17 has excellent weather resistance, low water vapor permeance and good water resistance, allowing it to be used outdoors and in high humidity environments.
- It is U.V. resistant. When dry, it may be painted with good quality, water-based paint.
- Foster® Safetee™ Duct Sealant 32-17 may be pressure tested within 16 hours dry time above 70ºF (21ºC) and below 60% RH.
- It quickly forms a strong bond to galvanized, aluminum or mild steel metal ducts. It has a mild odor when wet.
Applications & Uses
- Application Area
- Application Method
- Preparation and Application Information
Material preparation
- Do not thin.
- Apply only to clean, dry, oil-free surfaces.
- Keep container closed when not in use.
Application
- UL 181B MASTIC CLOSURE OF UL 181 FLEXIBLE AIR DUCTS:
- Apply to clean, dry, oil-free surfaces by brush, trowel or power extrusion.
- Uniformly brush out a 2” wide coat over the joint, at the nominal rate of 2 gal./100 sq. ft. (0.8 l/m2 ).
- Total coverage rate to be 45 – 55 sq. ft./gal. (1.1 – 1.4 m2 /l).
- Allow the completed joint to dry at least 24 hours above 70ºF (21ºC) before pressure testing. High humidities (over 70%) and/or cooler temperatures may retard drying.
- Total wet film thickness to be 32 mils +/- 3 mils.
- Other sealing applications – NOT UL 181:
- Apply a continuous film of Foster® Safetee™ Duct Sealant 32-17 over all areas of the indoor or outdoor duct system where air leakage may occur.
- A brush may be used to work the sealant into joints and remove excess.
- On spiral ducts, apply a coat to the male end of the coupling prior to fitting the straight run of spiral duct over it.
- Brush excess Foster® Safetee™ Duct Sealant 32-17 over the joint to complete the seal.
- Screw holes and flanges should also be sealed with a coat of Foster® Safetee™ Duct Sealant 32-17.
- It may be applied to the inside or the outside of the duct.
- Power extrusion:
- Foster® Safetee™ Duct Sealant 32-17 may be applied using a wide variety of power (pressure) extrusion equipment suitable for use with water-based sealants.
- It is a soft buttery gel with a typical viscosity range of 130,000 – 160,000 cps.
- Corrosion resistant pumps and fittings are suggested.
- Top coating
- After it is completely dry, Foster® Safetee™ Duct Sealant 32-17 may be top coated with good quality water-based paint.
Clean up
- Use fresh water to clean brushes and equipment before product dries.
- Dry product may be removed with hot soapy water or strong solvent such as chlorinated solvent (non-flammable) or xylol (flammable).
- Limitations
- Always test plastic materials for compatibility when using a solvent-based product.
- Systems may be pressure-tested 36 hours after application, above 60°F (16°C).
- Make certain this product is completely dry and the area free from solvent odor if food is involved.
- Stoarage Information
- Store and apply between 40°F (4°C) and 100°F (38°C).
Properties
- Physical Form
- Typical Properties
- Application Properties
- Flame Characteristics
- Note
¹ - Tested as applied in two 2” wide strips spaced 8 in. on center at a coverage of 26.7 sq. ft./gal. Applied to 1/4 inch (6.4 mm) inorganic reinforced cement board. The flame spread may vary at different product thicknesses and/or when applied over other surfaces.
| Value | Units | Test Method / Conditions | |
| Average Weight / U.S. Gallon | 11.6 | lb/gal | ASTM D1475 |
| Average Non-Volatile (by Volume) | 55.0 | % | ASTM D2369 |
| Shore Hardness (Type A) | 80.0 | - | ASTM D2240 |
| Water Vapor Permeance | 0.45 | Perms | ASTM E96, PROCEDURE A |
| Wet Flammability | 99.0 | °C | - |
| Coverage Range (Brush, 0.064 in. – 0.032 in., wet film thickness) | 25 - 50 | sq. ft./gal. | |
| Coverage Range (Caulking Gun, Linear, 1/8 in. bead ) | 125.0 | ft./10.5 fluid oz. tube | |
| Drying Time (Dry Through, at 23ºC, 50% RH) | 24.0 | Hours | |
| Drying Time (Set to Touch, 23ºC, 50% RH) | 1.0 | Hour |
| Value | Units | Test Method / Conditions | |
| Service Temperature Range | -7 to 93 | °C | - |
| Value | Units | Test Method / Conditions | |
| Surface Flame Spread¹ | 5.0 | ASTM E84 | |
| Smoke Developed¹ | 0.0 | ASTM E84 |
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories