H.B. Fuller Isomelt M

Identification

Chemical Family

Butyl Rubber

GBU

BAS

RTU Product Type

Hot Melt Sealant,

1K (1 component) Sealant,

Solvent free (100% Solids) Sealant

Categories

Markets → Building & Construction → Applications → Building Envelope & Roofing → EIFS & Insulation

Markets → Building & Construction → Applications → Building Envelope & Roofing → Glazing & Window Elements

Markets → Industrial → Applications → Chemical & Industrial Manufacturing → Industrial Adhesives & Sealants

Technologies → Adhesives & Sealants → Product Families → Sealing Technology → 1K (1 Component) Sealants

Technologies → Adhesives & Sealants → Product Families → Sealing Technology → Hot Melt Sealants

Technologies → Adhesives & Sealants → Product Families → Sealing Technology → Solvent-free Sealants

Applications

Application Area

Windows,

Insulating Glass,

Spacer

Compatible Substrates & Surfaces

Glass,

Plastics,

Galvanized Steel,

Aluminum Alloys,

Alloy Steel

Applications & Uses

Application Guidelines

Due to the huge variety of available substrates preliminary testing regarding adhesion and compatibility is strongly recommended.

Clean tools immediately after use.

Usage Information

• Processing

Surfaces should be dry, clean, and free from dust or grease. A cleaning agent such as Körasolv GL is appropriate for surface preparation. Product will fill the sealant channel and bond to glass using bulk hot melt application equipment set to the recommended application temperatures in the technical data table. It is important to ensure that sealant evenly fills the channel to a minimum depth of no less than 3/16” (~5mm) around the entire perimeter of the IGU. Ensure application temperature is maintained at the application nozzle to prevent cold joints and poor adhesion.

• Clean Up

Körasolv GL or common solvents such as mineral spirits or acetone.

Features

Ready-to-Use Product Features

Heat Resistance,

Low Gas Permeability,

Excellent Gas Retention,

Excellent Moisture Vapor Resistance,

Low Stringing,

Low Vapor Permeance,

Intercept

Features & Benefits

Product Characteristics

Isomelt M is a 100% solids, one-component sealant engineered for exceptional processing when used with automated insulating glass assembly lines. Isomelt M brings the following to the insulating glass manufacturing industry:

• Best-in-class application hygiene with respect to stringing and tack
• Very low water vapor and gas permeation rates
• Meets and/or exceeds the requirements of ASTM E2190

Packaging & Availability

Regional Availability

• North America

Packaging Information

• 55 gal straight-sided drum, 463 lb (210kg)
• 5 gal pail, 40 lb (18.14kg)

Physical Properties

Color (Properties)

Black

Physical Form

Solid

Properties

Application Temperature:

170.0~200.0 °C

Density:

1174.334 kg/m³

Shear Strength:

0.25493 MPa

Shelf Life:

24.0 months

Specific Gravity:

1.17502

Tensile Strength:

0.2553 MPa

Typical Physical Properties

	Value	Units	Test Method / Conditions
Application Temperature	170 - 200	°C	-
Density	9.8	lb/gal	-
Moisture Vapor Transmission Rate	0.92	g/m²day	ASTM F-1249
Peel Strength	13	N/mm	-
Permeability (argon gas)	40	cm³/m²day	Internal Test Method
Safety Temperature (use in a well-ventilated area)	max. 450	°F	-
Shear Strength	60	psi	-
Solids Content	100	%	-
Tensile Strength	37	psi	-

Processing Parameters

	Value	Units	Test Method / Conditions
Density (70°F)	9.8	lb/gal	DIN EN ISO 2811-1
Melt Volume-Flow Rate (4.8 lbs, 360°F)	90	cm³/ 10 min	DIN EN ISO 1133
Processing Temperature (hot melt extruder / tank melting system)	340 - 360	°F	-
Processing Temperature (insulating glass line)	340 - 390	°F	-
Storage Temperature	50 - 90	°F	-

Cured Properties

	Value	Units	Test Method / Conditions
Adhesion (float glass, crossover stress, σC)	0.23	mPa	EN 1279-4 annex A
Gas Permeation Rate (Argon)	max. 0.060	g/(m² d)	EN 1279-4 annex D
Gas Permeation Rate (Argon)	max. 0.003	g/(m²-h)	EN 1279-4 annex D
Water Vapor Transmission Rate	max. 0.5	g/(m² d)	EN 1279-4 annex D

Typical Properties

	Value	Units	Test Method / Conditions
Volatile Content	0.11	%	EN 1279-4 annex H

Regulatory & Compliance

Quality Standards

ASTM E2190

Safety & Health

Safety Conditions

Extreme care should be exercised when working with hot or warm melts in their fluid state. Use eye protection and thermally protective clothing. To minimize the risk of flammable vapors, do not exceed a melt temperature of 450°F. Use in a well-ventilated area.

Storage & Handling

Storage Conditions

H.B. Fuller Isomelt M should be used within the shelf life specified on the packaging. The storage stability applies to material stored under appropriate conditions only (original unopened containers, recommended storage temperature).

Storage and Shelf Life Conditions

Store in a cool, dry, clean place. Packaging must be kept sealed and protected from moisture. Product may be stored in this manner for 24 months from date of manufacture.

Shelf Life

24 months