Foster 81-84NH two-component thermosetting urethane adhesive/sealant — bonds and seals cellular glass (FOAMGLAS), polystyrene, phenolic and PUR/PIR insulation to themselves and to metal or masonry in low-temperature installations.
Attachment adhesive and joint sealant in one product
No flammable solvents or halide-containing materials
Strong yet flexible bond withstands thermal shock and impact
No asphalt — can be top-coated with solvent-based products without bleed-through
Low-VOC (20 g/L Part A) — meets LEED 2009 IEQ 4.1
PACKAGING & PAIRS WITH
Packaging3.4-gal kit (Part A + Part B); mix 8:1 by volume
Handling & storageBlend only what can be applied in 1 hr; bond within 1 hr of application; do not thin or heat; coverage 20–30 ft²/gal on cellular glass, 50–100 ft²/gal on board stock