Foster® SPARK-FAS® WB Adhesive 85-70™

1 of 92 products in this brand
Foster® SPARK-FAS® WB Adhesive 85-70™ is a high-tack, quick-setting, water-based adhesive primarily designed for adhering fibrous glass or mineral wool insulations to both painted and unpainted steel, galvanized, or aluminum air conditioning or hot air ducts. This adhesive is composed of a synthetic elastomer emulsion, and it is non-flammable when in its wet state.

Product Type: Waterborne Adhesive

Application Area: Brush

Compatible Substrates & Surfaces: Aluminum, Concrete, Fiberglass, Metal, Steel, Wood

Application Method: Roller, Spray

Features: Anti Dripping, Excellent Surface Tack, Fast Setting, Fire-Resistant, Spatter Resistant

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Identification & Functionality

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Product Highlights
  • SPARK-FAS® WB ADHESIVE is ideal for bonding fibrous glass and rigid plastic foam insulations to wood, concrete or other materials of construction.
  • SPARK-FAS® WB ADHESIVE meets ASTM C916, Type 1 (ASC-A-7001, Type 1) requirements.
  • SPARK-FAS® WB ADHESIVE meets MIL-DTL-3316D, Class 2, Grade A requirements, and is listed on the QPD.
  • SPARK-FAS® WB ADHESIVE contains no asbestos, lead, mercury, or mercury compounds.
  • SPARK-FAS® WB ADHESIVE 85-70 meets the requirements of California Dept. of Public Health Standard Method v1.2
  • VOC Emissions and Content requirements to contribute to LEED v4 EQ Credit: Low Emitting Materials - Paints and Coatings
  • Collaborative for High Performance Schools EQ 7.1
  • Meets NFPA Standard 90A and 90B 25/50 requirements as a closure mastic

Applications & Uses

Application Area
Application Method
Compatible Substrates & Surfaces
Preparation and Application Information

Material Preparation

  • Stir well, Do Not Thin.
  • Apply only to clean, dry, oil-free surfaces.
  • Keep container closed when not in use.

Application 

  • Apply the SPARK-FAS® WB Adhesive to the surface uniformly at 250 – 400 sq. ft. per gal. (6.1 – 9.8 m2/l).
  • While still wet, press the insulation into place, making sure that complete contact is made with applied adhesive.

Brush/Roller

  • Use clean equipment suitable for water-based paints. Apply SPARK-FAS® WB Adhesive to metal surface uniformly. Press insulation into place, making sure that complete contact is made with applied adhesive.

Spray

  •  SPARK-FAS® WB Adhesive can be easily applied, with a paint-like spray pattern, using a variety of conventional air atomizing and airless spray equipment. The following equipment combinations are suggested:
  Spray Gun Model Fluid Nozzle Air Cap Fluid Pressure

Atomization Pressure

Binks 62 63 66SD 25-25 psi 60-70 psi
DeVilbiss JGA FX 770 20-25 psi 60-70 psi
  • For spray equipment information, please contact your spray equipment supplier. Average viscosity range: 5000 - 8000 cps. Corrosion resistant pumps and fittings are suggested.

Clean Up

  • To clean up, use warm soapy water if still wet. When dry, use mineral spirits (flammable) or chlorinated solvent (non-flammable).

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Average Weight / U.S. Gallon8.8lbs.ASTM D1475
Average Non-Volatile (by Volume)50.0% ASTM D2369
Average Non-Volatile (by Weight)56.0% ASTM D2369
Coverage Range (Spray)250 - 400sq. ft./gal.-
Coverage Range (Brush/roller)150 - 200sq. ft./gal.-
Bonding Time Range ¹0 - 20minutes
Flammability93.0°C-
Application Properties
ValueUnitsTest Method / Conditions
Service Temperature Range-29 to 93°C-
Flame Characteristics
ValueUnitsTest Method / Conditions
Flame Spread ²0ASTM E84
Smoke Developed ²0ASTM E84
Note

¹ - Depends on temperature, humidity and application rate.

² - Tested at coverage rate of 200 sq. ft. per gal.. Applied to 1/4 inch inorganic reinforced cement board. The flame spread may vary at different product thicknesses and/or when applied over other surfaces.

Regulatory & Compliance

Storage & Handling

Shelf Life
12 months
Handling Conditions
  • Store and apply between 40°F (4°C) and 100°F (38°C), protect from freezing until dry.
  • Always test plastic foam insulation for warpage when using a water-based adhesive.
  • Overhead applications may require mechanical fasteners.
  • Not suggested for use between two impermeable surfaces.