Foster® Safetee™ Duct Sealant 32-17
1 of 48 products in this brandFoster® Safetee™ Duct Sealant 32-17 is a fire-resistive, fibrated, water-based sealant suitable for both indoor and outdoor use as a vapor barrier for low, medium, and high-velocity heating and air conditioning ducts. This versatile sealant serves as a strong and flexible adhesive and sealant, creating a robust barrier against air leakage. It can be applied with or without reinforcing tape or membrane, and for duct system rigidity, mechanical fasteners of the standard type and quantity are necessary.
RTU Product Type: Sealant, Waterborne Sealant
Application Area: Brush
Application Method: Extrusion, Trowel
Features: Excellent Flexibility, Fire-Resistant, Good Toughness, Good UV Resistance, Good Weather Stability, Vapor Barrier, Water-based, Water Resistant
Enhanced TDS
Identification
- GBU
- RTU Product Type
- Categories
Applications
- Application Area
- Application Method
Applications & Uses
- Limitations
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- 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.
- Preparation and Application Information
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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).
- Stoarage Information
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- Store and apply between 40°F (4°C) and 100°F (38°C).
Features
- Ready-to-Use Product Features
Features & Benefits
- Product Highlights
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- 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.
Packaging & Availability
- Regional Availability
Physical Properties
- Physical Form
Properties
- Note
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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.
- Application Properties
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Value Units Test Method / Conditions Application Temperature 4 - 38 °C - Average Viscosity 130000 - 160000 cPs - Service Temperature Range -7 to 93 °C - - Flame Characteristics
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Value Units Test Method / Conditions Smoke Developed¹ 0 - ASTM E84 Surface Flame Spread¹ 5 - ASTM E84 - Typical Properties
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Value Units Test Method / Conditions Average Non-Volatile Content 55 Vol(%) ASTM D2369 Coverage (caulking gun, linear, 1/4 inch bead) 30 ft./10.5 fluid oz. tube - Coverage Range (brush, 0.064 in. - 0.032 in., wet film thickness) 25 - 50 sq. ft./gal. - Coverage Range (caulking gun, linear, 1/8 inch bead) 125 ft./10.5 fluid oz. tube - Density 11.6 lbs/gal ASTM D1475 Drying Time (above 40ºF, with a relative humidity of 50%, to resist rain washoff) 12 - 15 hours - Drying Time (at 23ºC, 50% RH, dry through) 24 hours - Drying Time (at 23ºC, 50% RH, set to touch) 1 hour - Flash Point (wet flammability) 99 °C - Hardness 80 Shore A ASTM D2240 Non-Volatile Content 69 Wt(%) ASTM D2369 Storage Temperature 4 - 38 °C - Water Vapor Permeance 0.45 perms ASTM E96, Procedure A
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories