Foster® Spark-Fas® Adhesive 85-20™
1 of 73 products in this brandFoster® Spark-Fas® Adhesive 85-20™ is a rapid-setting, non-flammable, fire-resistant synthetic elastomer adhesive. It is specifically utilized for bonding duct wrap, fibrous glass, or mineral wool insulations with densities of up to 6 lbs. to galvanized steel and aluminum air conditioning or hot air ducts. This adhesive is chosen when a fire-resistive dry film is necessary. It contains non-flammable chlorinated solvents, eliminating the risk of explosions and fires during the application process.
RTU Product Type: Elastomeric Adhesive
Application Area: Brush, Duct Wrap, Insulating Glass
Compatible Substrates & Surfaces: Aluminum, Concrete, Galvanized Steel, Metal, Wood
Features: Fast Setting, Fire-Resistant
Enhanced TDS
Identification
- GBU
- RTU Product Type
- Categories
Applications
- Application Area
- Compatible Substrates & Surfaces
Applications & Uses
- Limitations
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- Store and apply between 40°F and 100°F.
- Always test plastic and painted materials for compatibility when using a solvent-based product. Do not use with flexible PVC.
- 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
- Stir well, Do not thin. No need to prime aluminum or galvanized metal. Apply only to clean, dry, dust-free surfaces.Keep container closed when not in use to prevent solvent evaporation. Do not use pumps or equipment that have aluminum parts in contact with the adhesive.
Application
- Insulation attachment:
- The metal surface shall be coated by brush with SPARK-FAS® ADHESIVE at a coverage of 200 sq. ft./gal. (4.9 m2/l). Allow an open time of 0 to 15 minutes to develop full tack. Install insulation and apply pressure to assure complete and uniform contact to the metal surface. The application suggestions do not preclude the use of additional mechanical fastening as recommended by insulation manufacturer or required by design engineer.
- Lap, butt strip and pin patch sealing:
- All longitudinal and butt joint laps of facing shall overlap a minimum of two inches (5 cm). Apply a brush coat of SPARK- FAS® ADHESIVE at the rate of 75 sq. ft./gal. (1.8 m2/l). Allow an open time of 2 to 10 minutes to develop full tack. Bond laps by applying uniform pressure, smoothing out to avoid wrinkles and gaps.
- Alternate - Apply a brush coat of SPARK-FAS® ADHESIVE at the rate of 150 sq. ft./gal. (3.7 m2/l) to each surface. Allow an open time of 2 to 10 minutes to become tacky. Bond laps by applying uniform pressure, smoothing out to avoid wrinkles and gaps.
- Brush:
- Use a good brush (suitable for chlorinated solvents), making strokes as long as possible. Do not overwork.
Clean Up
- Use a chlorinated solvent (non-flammable) or xylol (flammable) to clean brushes and equipment.
Features
- Ready-to-Use Product Features
Features & Benefits
- Labeling Claims
- Product Highlights
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- Spark-Fas® Adhesive will adhere insulation to wood and concrete. In this application, the coverage may not be as great as shown at left.
- Spark-Fas® Adhesive gives superior service when it is used as a contact adhesive to cement the laps of aluminum foil, FSK, ASJ and FRK facings.
Packaging & Availability
- Regional Availability
Physical Properties
- Physical Form
Properties
- Note
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¹ - Tested at coverage rate of 200 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.
- Typical Properties
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Value Units Test Method / Conditions Average Non-Volatile Content 44 Wt(%) ASTM D2369 Bonding Time Range (for insulation attachment) 0 - 15 minutes - Bonding Time Range (for lap sealing) 2 - 10 minutes - Coverage (wet surface with 0.2 mm coat thickness, for insulation attachment) 4.9 m²/L - Coverage (wet surface with 0.5 mm coat thickness, for lap sealing) 1.8 m²/L - Density 10.8 lbs/gal ASTM D1475 Flash Point (wet flammability) 37 °C - Service Temperature Range -29 to 82 °C - Storage Temperature 4 - 38 °C - Volatile Organic Compound Content (less water) 162 g/L - - Flame Characteristics
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Value Units Test Method / Conditions Flame Spread¹ 15 - ASTM E84 Smoke Developed¹ 0 - ASTM E84 - Application Properties
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Value Units Test Method / Conditions Application Temperature 4 - 38 °C -
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Quality Standards
- Compliance
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- Spark-Fas® Adhesive meets ASTM C916, Type I (ASC-A- 7001, Type I) requirements.
- Spark-Fas® Adhesive meets MIL-A-3316C, Class 2, Grade A test requirements.
Storage & Handling
- Shelf Life
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12 months