3M

3M 4108 Urethane Foam Tape

3M™ 4108 is a natural-white, 1/8” thick, firm, high-density, open-cell urethane foam tape coated with an acrylic adhesive, offering excellent cushioning, airflow, and moisture sealing. It delivers high initial tack to a wide range of surfaces and excellent shear holding strength, even at elevated temperatures.

Natural, 0.125” firm, high-density open-cell foam design helps trap moisture, dust and contaminants
Allows air or gas vapors to pass through for a breathable seal
Dampens sounds and absorbs vibration when used in electronic applications

Adhesive Type: 3M™ 350 (High Performance Acrylic)

Color: Natural-White

Liner Material: White, Silicone Treated Paper

Backing/Carrier Material: Open-Cell Polyurethane Foam

Overview
Customize
Features
Specifications
Compliance
Resources

Overview

Consult

Specify a finalized design or create a new one from scratch with our experienced converting experts.

Design

Pair our material sampling library with our precision converting capabilities to optimize and validate a prototype.

Produce

Rely on our top-tier suppliers, strict quality controls, and hands-on help to ensure your product's effectiveness throughout its lifecycle.

Customize

Customize This Material

Our wide range of converting capabilities allow us to take this material and transform it into the right width, length, shape or fabricated part to not only achieve ideal integration into your end use, but also optimize how you apply the material in your application. Our converting equipment paired with our expert engineering team will help you create the exact custom solution for your unique requirements.

To learn more about the most common converting services we offer, or to contact our team to start discussing your solution, please utilize the below links:

Tape Slitting

Die-Cutting

Custom Part Fabrication

Prototyping

Custom Length Rolls

Features

Natural, 0.125” firm, high-density open-cell foam design helps trap moisture, dust and contaminants
Allows air or gas vapors to pass through for a breathable seal
Dampens sounds and absorbs vibration when used in electronic applications
Excellent cushioning characteristics and high absorbency
Offers high initial quick-stick to multiple substrates
Provides excellent shear strength and high temperature performance

Specifications

Color	Natural-White
Backing/Carrier Material	Open-Cell Polyurethane Foam
Adhesive Type	3M™ 350 (High Performance Acrylic)
Backing/Carrier Thickness	125 mil
Density	16 lb/ft³
Liner Material	White, Silicone Treated Paper
Liner Thickness	3 mil
Tensile Strength	130 lb/in²
Elongation	80%
Maximum Temperature Performance	350°F
Additional Notes	3M™ Urethane Foam Tape 4108 may turn yellow when exposed to light, only affecting its appearance and not physical performance.

Compliance

We value the importance of up to date an accurate regulatory information on the products we work with. For the most current Compliance and Regulatory information on your product of interest, please contact our experts for assistance.

Resources

Technical Data Sheet

3M™ Urethane Foam Tape 4108 is a natural-white, 1/8” (125 mil) thick, firm, high-density, open-cell foam tape coated on one side with 3M™ Adhesive 350 and protected by a silicone-treated paper liner. The open-cell foam structure provides excellent cushioning and vibration damping while allowing the passage of air and gas vapors. It also offers high absorbency to help seal out moisture, dust, and drafts, making it suitable for a wide range of environmental conditions and operating temperatures. 3M™ 4108 features 3M™ Adhesive 350, a modified acrylic adhesive that provides high initial tack to a variety of substrates, along with excellent chemical resistance and strong shear-holding performance. The adhesive system maintains reliable performance at elevated temperatures, with long-term resistance up to 200°F (93°C) and short-term resistance up to 350°F (177°C).

Its open-cell foam construction is commonly used between component panels where a degree of separation is required to dampen or prevent vibration. The foam is also commonly used as a thermal insulation barrier and as a protective seal against dust and other contaminants in applications where airflow remains necessary, such as electronic assemblies that rely on air circulation for cooling.

3M™ Single Coated Urethane Foam Tape Series 4100 is available in 3 thicknesses: 62 mil, 125 mil, and 250 mil.

Cushion and dampen sound in electronics such as printers, keyboards, computers, aircraft lights and automotive dashboards
Register covers
Recessed lighting
Door, window and cabinet seals

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