Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Product Highlights
- Fire Resistive Adhesive is the preferred adhesive for use with rigid polyurethane insulations.
- It can be used as a fabricating adhesive in making fittings with polyurethane insulation, and as an adhesive to attach insulation to equipment surfaces.
- Bonds of polyurethane to itself made with 81-33 are stronger than the base insulation.
- Fire Resistive Adhesive withstands continuous surface temperatures up to 300°F (149°C), but it has been subjected to higher temperatures for short intervals with good results.
- Its excellent resistance to water and high humidity makes it a good sealing compound for joints and seams of insulation on cold water piping and equipment.
- Fire Resistive Adhesive meets the requirements of Military Specification MIL-A-3316C, Class 3, Grade A.
- Fire Resistive Adhesive contains no asbestos, lead, mercury, or mercury compounds.
Applications & Uses
- Markets
- Application Area
- Application Method
- Compatible Substrates & Surfaces
- Preparation and Application Information
Material Preparation
- Remove paper disk and any skin on surface of adhesive in container.
- Stir well.
- Do Not Thin.
- Apply only to clean, dry surfaces.
- Keep container closed when not in use to prevent solvent evaporation.
Application
- Galvanized metal must first be treated with Foster Primer 40-26 and allowed to dry.
- Attachment Adhesive - Apply with notched trowel at 40 sq. ft./gal. (1.0 m2 /l).
- Joint Sealant / Adhesive - Apply with smooth trowel at 25 sq. ft./gal. (0.6 m2 /l). Installllllll insulation applying pressure to assure complete and uniform contact to the surface, twisting the insulation section slightly to break any skin that may have formed on the adhesive surface.
- Square Notched Trowel Use a steel trowel with square teeth 1/8 inch wide, 1/8 inch deep and 1/8 inch apart. Trowel with firm pressure leaving ridges of adhesive. Press insulation firmly into place to obtain complete contact. On rough or porous surfaces a thicker application of adhesive will be required in order to assure contact between the insulation and the substrate.
Clean Up Use a solvent such as chlorinated solvent (non-flammable) or xylene (flammable).
- Coverage Range
Wet coverages shown below are for smooth non-porous surfaces. Porous or rough surfaces may require high gallonage to attain required dry thickness. 1.33 to 1.25 gal./100 sq. ft per coat. 0.021 to 0.020 in. wet film thickness (Subject to nature of material being coated.)
Properties
- Color
- Physical Form
- Typical Properties
- Application Properties
- Flame Characteristics
- Note
¹ - Tested at coverage rate of 40 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 | |
| Weight/U.S. Gallon | 13.2 | lbs. | ASTM D1475 |
| Coverage Range | 25 - 40 | sq.ft./gal. | - |
| Bonding Time Range | 2 - 10 | Minutes | FSTM 66 |
| Wet Flammability | 43.0 | °C | ASTM D3278 |
| Value | Units | Test Method / Conditions | |
| Application Non-volatile (by Volume) | 66.0 | % | ASTM D1644 |
| Application Non-volatile (by Weight) | 80.0 | % | ASTM D1644 |
| Service Temperature Range | -59 to 149 | °C | - |
| Value | Units | Test Method / Conditions | |
| Flame Spread ¹ | 10 | ASTM E84 | |
| Smoke Developed ¹ | 5 | ASTM E84 |
Regulatory & Compliance
- Chemical Inventories
Storage & Handling
- Shelf Life
- 6 months
- Handling Conditions
- Store and apply between 40°F (4°C) and 100°F (38°C).
- Always test plastic materials for compatibility when using a solvent base product.
- Make certain this product is completely dry, and the area is free from solvent odor if food is involved.
- Galvanized metal must be primed with Foster 40-26.
- If used between impermeable surfaces, drying time will be extended.