H.B. Fuller

Identification

Chemical Family: Urethanes
GBU: BAS
RTU Product Type: 2K (2 component) Sealant,

2K (2 component) Adhesive
Blend: true
Single Ingredient: false

Categories: Markets → Industrial → Applications → Chemical & Industrial Manufacturing → Equipment & Parts

Technologies → Adhesives & Sealants → Product Families → Bonding & Sealing Chemistry → Thermosetting Adhesives & Sealants

Technologies → Adhesives & Sealants → Product Families → Bonding Technology → 2K Liquid Reactive Adhesives

Applications

Application Area: Joints
Application Method: Brush,

Trowel
Compatible Substrates & Surfaces: Metal,

Stainless Steel,

Foam,

Masonry,

Polyurethane (PU) Foam,

Phenolic Foam,

Cellular Glass

Applications & Uses

Preparation and Application Information

Material Preparation

Do Not Thin.
Stirring should not be necessary, but if Part A has remained undisturbed for any extended period, stir well.
Do not use sticks or paddles, which could splinter or otherwise contaminate the product.
Containers must be kept closed and in dry storage when not in use.
Blend only the amount of material, which can be applied in one hour.
Mixing should be continued for three minutes maximum with a suitable air or electric mixer operating at low speed, until the 81- 84NH is smooth and completely homogeneous.
Do not over mix. Do not heat Part A, Part B, or the mixed material.
Exposure to vapors of heated product may be harmful.
Heated vapors are potential respiratory and skin sensitizers, and possible eye irritants.
Provide adequate ventilation in enclosed areas.
The 3.4 gallon (12.8 liter) kit is packaged to allow for the full 48 oz (1.4 liter) jug of Part B to be mixed directly in the pail with 3 gallons (11.4 liters) of Part A.
If Part A and Part B are ordered in separate packaging one 0.5 gallon (1.9 liter) jug of Part B is to be mixed with one 4 gallon (15.1 liter) pail of Part A.
Alternately Part A and Part B may be portioned off and mixed in a separate container in quantities as needed for a one hour working period.
When portioning off maintain the proper mix ratio:
8 Parts A: 1 Part B (By Volume)
9 Parts A: 1 Part B (By Weight)
Replace the cap on unused Part B immediately after use to prevent moisture contamination.

Application

Apply only to clean dry surfaces.
Adhesive/Sealant 81-84NH may be applied to either or both surfaces at the recommended coverage rate.
Surfaces must be bonded within one hour after application of the adhesive.
On rough surfaces, a thicker application of 81-84NH is required as necessary to assure complete contact between the insulation and the substrate.
A notched trowel is suggested.

Suggested coverages:

Cellular glass block - 20 to 30 sq. ft./gallon (0.49 to 0.74 m2/l).
Polyurethane, polystyrene, and polyisocyanurate rigid board stock – 50-100 sq. ft/gallon (1.22 to 2.45 m2/liter).

Clean-up

Before adhesive cures, clean tools and equipment with chlorinated solvent (non-flammable) or mineral spirits (flammable). Dried 81- 84NH Adhesive/Sealant is extremely difficult to remove.

Features

Ready-to-Use Product Features: Flexible,

High Strength

Features & Benefits

Labeling Claims

Lead-free,

Solvent-free,

Flammable Solvents-free,

Halogen-free,

Asbestos-free,

Mercury-free

Product Highlights

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 2009 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.

Packaging & Availability

Regional Availability

Asia Pacific
Europe
North America
Latin America
India/MiddleEast/Africa (IMEA)

Physical Properties

Physical Form: Liquid

Properties

Pot Life:

1~2 hours

Shelf Life:

12 months

Application Properties


	Value	Units	Test Method / Conditions
Service Temperature Limits (PIR /polyurethane foam insulations, as a joint sealant/adhesive)	-190 to 93	°C	-
Service Temperature Limits (PIR/polyurethane foam insulations, pir/urethane foam to metal)	-165 to 93	°C	-
Service Temperature Limits (cellular glass insulation, as a joint sealant/adhesive)	-73 to 93	°C	-
Service Temperature Limits (cellular glass to stainless steel)	-105 to 93	°C	-

Typical Properties


	Value	Units	Test Method / Conditions
Average Non-Volatile Content (mixed)	97	Vol(%)	ASTM D2369
Average Non-Volatile Content (mixed)	98	Wt(%)	ASTM D2369
Coverage Range	20 - 100	sq. ft./gal.	-
Cure Time (at 25°C, cure through)	24	hours	-
Cure Time (at 25°C, maximum strength)	7	days	-
Cure Time (at 25°C, set)	8	hours	-
Density (mixed)	11.9	lbs/gal	ASTM D1475
Flash Point (wet flammability)	93	°C	-
Mix Ratio (by volume, part A:part B)	8:1	-	-
Mix Ratio (by weight, part A:part B)	9:1	-	-
Pot Life (at 25°C)	1 - 2	hours	FSTM 91A
Storage Temperature	4 - 38	°C	-

Component B


	Value	Units	Test Method / Conditions
Density	10.3	lbs/gal	ASTM D1475

Component A


	Value	Units	Test Method / Conditions
Density	12.1	lbs/gal	ASTM D1475

Regulatory & Compliance

Chemical Inventories: AICS (Australia),

DSL (Canada),

ENCS (Japan),

IECSC (China),

KECI (Korea),

PICCS (Phillipines),

TSCA (USA),

TCSI (Taiwan)

Storage & Handling

Handling Conditions

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.

Shelf Life