Foster® 81-84NH Adhesive/Sealant

FOSTER NON-HALOGENATED ADHESIVE/SEALANT

FOSTER 81-84NH Adhesive/Sealant is a two-component, high strength thermosetting urethane adhesive containing no flammable solvents or halide-containing materials. It is designed to bond various types of low-temperature insulation to themselves, as well as to to metal and masonry substrates including stainless steel. After curing, it forms a strong, yet flexible bond capable of withstanding thermal shock and mechanical impact.

81-84NH Adhesive/Sealant can be used as both an attachment adhesive and joint sealant in low temperature installations using cellular glass, polystyrene, phenolic or PUR and PIR foam insulations. It contains no asphalt and can be top-coated with solvent based products without bleed-through.

81-84NH Adhesive/Sealant meets requirements for LEED IEQ 4.1 Low-Emitting Materials, Adhesives and Sealants. VOC 81-84NH Part A: 20 g/l, less water and exempt solvent. VOC 81-84 Part B: 0 g/l, less water and exempt solvents.

81-84NH Adhesive/Sealant contains no asbestos, lead, mercury, or mercury compounds.

LIMITATIONS
Store and apply between 40°F (4°C) and 100°F (38°C). Allow 48 hours curing time at 73° F (23° C) minimum before placing in service. Pot life will be longer at lower temperatures, shorter at higher temperatures. Part B is sensitive to moisture and humidity. Keep container tightly sealed when not in use. Do not heat Part A, Part B, or the mixed material. ^TM TradeMark of H.B. Fuller Construction Products Inc.

Manufactured at an ISO 9001 Quality System Certified Facility


COLOR:
Part A- Cream Part B- Brown

APPLICATION CONSISTENCY:
Trowel or Brush

AVERAGE WEIGHT/U.S. GALLON (ASTM D 1475):
Part A ­ 11.4 Lbs. (1.37 Kg/l) Part B - 10.3 Lbs. (1.23 Kg/l) Mixed (A&B) 11.3 Lbs. (1.35 Kg/l)

AVERAGE NON-VOLATILE (ASTM D 1644):
97% By Volume (Mixed) 98% By Weight (Mixed)

COVERAGE RANGE (FSTM 72):
(Varies with type of insulation) 0.080 in. (2.0 mm) to 0.016 in. (0.41 mm) 20 sq. ft. to 100 sq. ft. per gallon (0.49 to 2.45 m² /liter)

MIXING RATIO:
8 Parts A: 1 Part B (By Volume) 9 Parts A: 1 Part B (By Weight)

POT LIFE (FSTM 91A):
1-2 hours @ 77° F (25°C)

DRYING/CURING TIME (ASTM D 1640):
Set to Touch: 8 hours @ 77° F(25° C)
Dry Through: 24 hours @ 77° F (25° C) Maximum Strength: 7 Days @ 77° F (25° C)

SERVICE TEMPERATURE LIMITS:
As a joint sealant/adhesive with Urethane Foam -310°F to 200°F (-190°C to 93°C) Urethane Foam to Metal -260°F to 200°F (-162°C to 93°C) Cellular Glass Insulation -100°F to 200°F (-73°C to 93°C)

WET FLAMMABILITY (ASTM D 3278):
(Part A, B or Blended) Flash Point: over 200° F (93° C)

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