H.B. Fuller 7155-3

H.B. Fuller 7155-3 heat-expandable sealer is a die-cut, rubber-based sealer that expands with the application of heat to form a flexible, closed-cell foam. It has excellent adhesion to galvanized and primed steel and is recommended for use between metal components to create a watertight seal.

Product TypeFoam Sealer, Heat Expandable Sealant, Sealer, Tape

Application AreaMetal Parts

Compatible Substrates & SurfacesMetal, Steel

FeaturesDie Cuttable, Easy To Apply, Excellent Sealing Capability, Good Adhesion, Good Gap Filling Capabilities, Heat Expandable, Medium Strength, Sound Damping, Vibration Damping

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Backing Material Type

Features & Benefits

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Cure Method
Basic Use

Used to fill gaps between metal parts, to form a seal, and to dampen sound and vibration in a variety of transportation OEM applications.


Typical Properties
ValueUnitsTest Method / Conditions
Specific Gravity1.05ASTM D792
Non-Volatile Contentmin. 98%
Volume Increase (at 121°C, after 15 min)100.0%ASTM D792
Water Absorption (at 121°C, after 15 min)max. 3%LP-463NB-07-01
Typical Properties
Property Typical Value   Test Method
Shear Adhesion - (after 15min at 121°C (250°F))   MS-CD-466
Shear Adhesion Initial (24hr at RT) 965kPa (140psi)   -
Shear Adhesion Condensing Humidity (250hrs at 38°C (100°F) and 100%RH)

1030kPa (149psi)

Shear Adhesion Heat-Aging 250hrs at 79°C (175°F)

1040kPa (150psi)

Shear Adhesion Salt Spray 900kPa (130psi)   ASTM B117
Low Temperature Flexibility No cracking or adhesion loss at -29°C (-20°F)   MS-CD-466 1” mandrel

Packaging & Availability

Regional Availability
  • North America
Available Packaging

7155-3 is typically sold in roll form with a tacky coextrusion to aid in the assembly process.

Storage & Handling

Shelf Life
24 Months
Storage Conditions

Store material in original unopened packaging in a cool dry area. Shelf life is 24 months when stored as recommended.