3M Urethane Foam Tape 4108 is a firm, high-density open-cell foam tape with acrylic adhesive for sealing, cushioning, and sound dampening in industrial applications. Features breathable design, excellent moisture and dust protection, and superior temperature performance.
3M™ Urethane Foam Tape 4108 is a premium firm, high-density, open-cell foam tape engineered with a pressure-sensitive acrylic adhesive on one side. This industrial-grade tape features a natural color and measures 3 inches in width by 36 yards in length with a 125 mil thickness. The tape is specifically designed to seal out moisture, dust, and drafts while allowing air or gas vapors to pass through for a breathable seal. The open-cell foam construction helps trap contaminants while maintaining airflow, making it ideal for applications requiring both protection and ventilation.
The 4108 foam tape excels in cushioning and dampening sound in various electronic applications including printers, keyboards, computers, aircraft lights, and automotive dashboards. It is also suitable for recessed lighting installations and door, window, and cabinet seals. The tape features 3M™ Adhesive 350, a pressure-sensitive modified acrylic adhesive that provides high initial quick-stick to multiple substrates with excellent chemical resistance and shear holding strength. The adhesive maintains performance at temperatures up to 200°F (93°C) in short-term applications and up to 350°F (176°C) for long-term use.
Each case contains 3 rolls of tape, with the adhesive protected by a thick silicone-treated paper liner that offers an attractive and clean appearance after application. The tape achieves satisfactory adhesion within 20 minutes and continues to build strength over time. This product is intended for industrial and occupational use only and is not suitable for consumer applications. The natural foam color may develop a yellow appearance when exposed to light, which does not affect the tape's physical performance or functionality.
Key Features
- Firm, high-density open-cell foam design traps moisture, dust, and contaminants effectively
- Breathable seal allows air and gas vapors to pass through for optimal ventilation
- Excellent sound dampening and vibration absorption for electronic applications
- High initial quick-stick with superior shear strength and temperature performance up to 350°F
- Single-sided acrylic adhesive with silicone-treated paper liner for clean appearance
Technical Specifications
| Specification |
Value |
| Product Name | 3M Urethane Foam Tape 4108 |
| Part Number | 4108 |
| UPC Code | 00021200710186 |
| Width (Imperial) | 3 inches |
| Width (Metric) | 76.2 mm |
| Length (Imperial) | 36 yards |
| Length (Metric) | 32.91 meters |
| Thickness (Imperial) | 125 mil |
| Thickness (Metric) | 3.2 mm |
| Foam Type | Firm, high-density open-cell |
| Backing Material | Urethane |
| Adhesive Type | Pressure-sensitive acrylic (3M Adhesive 350) |
| Number of Adhesive Sides | Single-sided |
| Liner Material | Silicone-treated paper |
| Liner Color | White |
| Liner Thickness (Imperial) | 3 mil |
| Liner Thickness (Metric) | 0.08 mm |
| Product Color | Natural |
| Density (Imperial) | 16 lb/ft³ |
| Density (Metric) | 256 kg/m³ |
| Tensile Strength (Imperial) | 130 lb/in |
| Tensile Strength (Metric) | 895 kPa |
| Temperature Performance (Short-term) | Up to 200°F (93°C) |
| Temperature Performance (Long-term) | Up to 350°F (176°C) |
| Shelf Life | 24 months |
| Units per Case | 3 rolls |
| Smallest Saleable Unit | Roll |
| Applications | Sealing, window and door glazing, sound dampening, vibration absorption |
| Industries | Appliance, Construction, General Industrial, Specialty Vehicles, Transportation |
| Indoor/Outdoor Use | Indoor/Outdoor |
| Adhesion Time | Satisfactory within 20 minutes, continues to build with time |
| Brand | 3M |
| Use Type | Industrial/Occupational use only - Not for consumer sale |
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