Industrial-grade 3M™ Urethane Foam Tape 4318 with charcoal gray color, 3/4 inch width, 36 yards length, and 125 mil thickness. Features low-density open-cell foam with acrylic adhesive for excellent cushioning, sound dampening, and vibration absorption. Ideal for sealing, mounting, and protecting sensitive components in electronics and industrial applications.
3M™ Urethane Foam Tape 4318 is a premium conformable, low-density, open-cell foam tape engineered with a pressure-sensitive acrylic adhesive on one side. This industrial-grade tape features a charcoal gray color and measures 3/4 inch wide by 36 yards long with a 125 mil thickness. The soft, conformable foam design helps seal out air, dust, and light when compressed, making it ideal for numerous mounting and sealing applications. The tape is backed with silicone-treated paper liner to protect the adhesive during storage and handling.
This versatile tape offers excellent cushioning characteristics and high absorbency, making it particularly effective for dampening sounds and absorbing vibration in electronic applications. The open-cell construction provides an effective air barrier and cushion when compressed by 50%, while maintaining breathability where airflow is necessary. The 3M™ Adhesive 430 delivers high initial quick-stick to multiple substrates with excellent chemical resistance and shear holding strength, performing reliably at temperatures up to 180°F (82°C) short term and 150°F (70°C) long term.
With a 24-month shelf life and sold as 12 rolls per case, this tape is suitable for indoor and outdoor use across appliance, construction, general industrial, specialty vehicle, and transportation industries. Recommended applications include cushioning and dampening sound in electronics such as printers, keyboards, computers, aircraft lights, automotive dashboards, register covers, recessed lighting, and door, window, and cabinet seals. For industrial and occupational use only.
Key Features
- Soft conformable low-density open-cell foam design seals out air, dust and light when compressed
- Excellent cushioning characteristics with high absorbency for sound dampening and vibration absorption
- High initial quick-stick acrylic adhesive provides excellent adhesion to multiple substrates
- Superior shear strength and high temperature performance up to 180°F short term and 150°F long term
- Single-sided adhesive with silicone-treated paper liner for clean application and easy handling
- Breathable open-cell construction maintains airflow for electronic component cooling
- 24-month shelf life with reliable performance across indoor and outdoor applications
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Urethane Foam Tape 4318 |
| Part Number | 4318 |
| UPC Code | 00051131064485 |
| Product Color | Charcoal Gray |
| Backing Material | Urethane |
| Adhesive Type | Acrylic (3M™ Adhesive 430) |
| Number of Adhesive Sides | Single-sided |
| Overall Width (Imperial) | 0.75 inches |
| Overall Width (Metric) | 19.05 mm |
| Overall Length (Imperial) | 36 yards |
| Overall Length (Metric) | 32.91 meters |
| Backing Thickness (Imperial) | 125 mil |
| Backing Thickness (Metric) | 3.2 mm |
| Density (Imperial) | 2 lb/ft³ |
| Density (Metric) | 32 kg/m³ |
| Tensile Strength (Imperial) | 25 lb/in |
| Tensile Strength (Metric) | 170 kPa |
| Primary Liner Material | Silicone Treated Paper |
| Primary Liner Thickness (Imperial) | 3 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Temperature Range Short Term | Up to 180°F (82°C) |
| Temperature Range Long Term | Up to 150°F (70°C) |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Units per Case | 12 Rolls |
| Application Type | Sealing, Window and Door Glazing, Sound Dampening, Vibration Absorption |
| Indoor/Outdoor Use | Indoor/Outdoor |
| Recommended Industries | Appliance, Construction, General Industrial, Specialty Vehicles, Transportation |
| Foam Type | Low-density Open-cell Urethane Foam |
| Primary Adhesive Feature | High initial quick-stick with excellent chemical resistance and shear holding strength |
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