H.B. Fuller Isomelt R

1 of 584 products in this brand
H.B. Fuller Isomelt R is a versatile sealant specifically designed for windows. It is available in both black and gray colors, providing options to suit different esthetic preferences. With its compatibility with glass substrates, Isomelt R is widely used in the building and construction industry, particularly in EIFS (Exterior Insulation and Finishing Systems) and insulation applications.

Compatible Substrates & Surfaces: Glass

Features: Excellent Gas Retention, Gas Barrier, Good Adhesion, Good Barrier Properties, Good Mechanical Properties, Intercept, Low Moisture Barrier Properties

    Enhanced TDS

    Identification & Functionality

    Features & Benefits

    Ready-to-Use Product Features
    Product Characteristics

    Isomelt R is a 100% solids, one-component, moisture-curable insulating glass sealant. Isomelt R brings the following to the IG industry:

    • Chemical bonding to glass, excellent adhesion to IG substrates
    • Industry-low moisture barrier properties
    • Meets and/or exceeds ASTM E2190 and CGSB 12.8

    Applications & Uses

    Markets
    Applications
    Application Area
    Compatible Substrates & Surfaces
    Cure Method
    Usage Information
    • Processing

    Surfaces should be dry, clean, and free from dust or grease. A cleaning agent such as Körasolv GL and/or the glass and spacer manufacturer’s recommended procedures are appropriate for surface preparation. It is important to ensure that sealant is applied to the correct dimensions required for your application. Ensure recommended application temperature is maintained at the application nozzle to prevent cold joints and poor adhesion.

    • Clean Up

    Körasolv GL or common solvents such as methyl ethyl ketone (MEK) or acetone will clean uncured material.

    Cure Profile

    This material cures in the presence of any moisture. A significant amount of strength is gained in the first 24 hours. >80% of the final strength is achieved in 7 days.

    Properties

    Color (Properties)
    Physical Form
    Typical Physical Properties
    ValueUnitsTest Method / Conditions
    Application Temperature120 - 150°C-
    Application Temperature91 - 110°C-
    Recommended Press Bond Temperaturemin. 140°FGED APN-0189
    Density9.8lb/gal-
    Tensile Strength154psi-
    Shear Strength93psi-
    Peel Strength90psi-
    Moisture Vapor Transmission Ratemax. 0.1g/m²dayASTM F-1249
    Argon Permeability70cc/m²dayInternal Test Method

    Regulatory & Compliance

    Quality Standards

    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. Use in a well-ventilated area and do not exceed 350°F.

    Packaging & Availability

    Regional Availability
    • Africa
    • Asia Pacific (Excluding Russia)
    • Europe (Excluding Russia)
    • India
    • Latin America
    • North America
    Packaging Information
    • 55 gal straight-sided drum, 474 lb (215 kg)
    • 5 gal pail, 40 lb (18.14 kg)

    Storage & Handling

    Shelf Life
    6 months
    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 6 months from date of manufacture.