Premium industrial-grade urethane foam tape with high-density open-cell design, pressure-sensitive acrylic adhesive, and superior sound dampening and moisture sealing capabilities for electronics, automotive, and construction applications.
3M™ Urethane Foam Tape 4108 is a premium single-sided foam tape featuring a firm, high-density open-cell urethane foam backing with pressure-sensitive acrylic adhesive. This industrial-grade tape measures 3/4 inch wide by 36 yards long with a 125 mil thickness, making it ideal for professional applications requiring superior cushioning and sound dampening. The natural-colored foam is specifically engineered to trap moisture, dust, and contaminants while allowing air and gas vapors to pass through, creating a breathable seal perfect for sensitive electronic components.
Designed for demanding industrial and occupational use, this tape delivers excellent cushioning characteristics combined with high absorbency and exceptional shear holding strength. The 3M™ Adhesive 350 formulation provides high initial quick-stick to multiple substrates and maintains performance across a wide temperature range, from short-term exposure up to 200°F (93°C) and long-term performance up to 350°F (176°C). The silicone-treated paper liner protects the adhesive during storage and handling, with a shelf life of 24 months.
This versatile foam tape is commonly used in electronics manufacturing, automotive applications, HVAC systems, and construction projects where vibration dampening, sound absorption, and moisture sealing are critical. Each case contains 12 rolls, making it economical for high-volume industrial operations. The open-cell foam structure allows thermal insulation while preventing vibration transmission between component panels.
Key Features
- Firm high-density open-cell urethane foam design traps moisture, dust and contaminants
- Breathable seal allows air and gas vapors to pass through for sensitive electronics
- Excellent sound dampening and vibration absorption in electronic applications
- 3M™ Adhesive 350 provides high initial quick-stick and exceptional shear strength
- Performs reliably at temperatures from 200°F short-term to 350°F long-term
- Single-sided pressure-sensitive acrylic adhesive on silicone-treated paper liner
- Superior cushioning characteristics with high absorbency for multiple substrates
- 24-month shelf life with clean, attractive appearance after application
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Urethane Foam Tape 4108 |
| Part Number | 4108 |
| UPC Code | 00021200034077 |
| Overall Width (Imperial) | 0.75 in |
| Overall Width (Metric) | 19.05 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Backing Material | Urethane |
| Foam Type | Firm, High-Density Open-Cell |
| Backing Thickness (Imperial) | 125 mil |
| Backing Thickness (Metric) | 3.2 mm |
| Product Color | Natural |
| Adhesive Type | Acrylic (3M™ Adhesive 350) |
| Number of Adhesive Sides | Single-sided |
| Primary Liner Material | Silicone Treated Paper |
| Primary Liner Color | White |
| Primary Liner Thickness (Imperial) | 3 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Density (Imperial) | 16 lb/ft³ |
| Density (Metric) | 256 kg/m³ |
| Tensile Strength (Imperial) | 130 lb/in |
| Tensile Strength (Metric) | 895 kPa |
| Application | Sealing, Window and Door Glazing, Electronics, Automotive |
| Temperature Performance (Short-term) | Up to 200°F (93°C) |
| Temperature Performance (Long-term) | Up to 350°F (176°C) |
| Indoor/Outdoor Use | Indoor/Outdoor |
| Industries | Appliance, Construction, General Industrial, Specialty Vehicles, Transportation |
| Smallest Saleable Unit | Roll |
| Units per Case | 12 rolls |
| Shelf Life | 24 months |
| Brand | 3M™ |
| Use Type | Industrial/Occupational Use Only |
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