Industrial-grade charcoal gray urethane foam tape with acrylic adhesive, 1/2 inch wide, 36 yards long, 125 mil thickness. Provides excellent sound dampening, vibration absorption, and moisture sealing for electronics and industrial applications. 18 rolls per case.
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 1/2 inch wide by 36 yards long with a thickness of 125 mil (3.2 mm). The soft, conformable foam design creates an effective air barrier and cushion when compressed, helping to seal out air, dust, light, and moisture from sensitive equipment and applications. The tape delivers excellent cushioning characteristics while maintaining high absorbency, making it ideal for sound dampening and vibration absorption in electronic equipment. Each case contains 18 rolls, providing substantial coverage for industrial applications.
The adhesive system uses 3M™ Adhesive 430, a modified acrylic formulation that provides high initial quick-stick to multiple substrates including metal, plastic, glass, and painted surfaces. This pressure-sensitive adhesive demonstrates excellent chemical resistance and superior shear holding strength, even at elevated temperatures. The tape performs reliably at temperatures up to 180°F (82°C) in short-term applications and maintains performance at 150°F (70°C) for long-term use. The adhesive is protected by a thick, silicone-treated paper liner that prevents premature sticking and ensures clean application.
The open-cell foam construction of 3M Urethane Foam Tape 4318 allows for controlled airflow while providing thermal insulation and vibration damping properties. This unique design makes it particularly suitable for applications where component cooling is necessary while maintaining separation and noise reduction. Recommended applications include cushioning and dampening sound in printers, keyboards, computers, aircraft lights, automotive dashboards, register covers, recessed lighting, and door, window, and cabinet seals. The tape achieves satisfactory adhesion within 20 minutes and continues to build strength over time.
Key Features
- Soft conformable low-density open-cell foam design seals out air, dust, light and moisture
- Excellent cushioning characteristics with high absorbency for sound dampening and vibration absorption
- 3M Adhesive 430 provides high initial quick-stick and excellent shear holding strength
- Performs reliably at temperatures up to 180°F short-term and 150°F long-term
- Silicone-treated paper liner protects adhesive and ensures clean application
- Single-sided acrylic adhesive with pressure-sensitive formulation
- Charcoal gray color with 125 mil thickness for industrial durability
- 24-month shelf life with consistent performance across multiple substrates
Technical Specifications
| Specification |
Value |
| Product Number | 4318 |
| Brand | 3M™ |
| Backing Material | Urethane |
| Adhesive Type | Acrylic (3M Adhesive 430) |
| Number of Adhesive Sides | Single-sided |
| Product Color | Charcoal Gray |
| Overall Width (Imperial) | 0.5 in |
| Overall Width (Metric) | 1.3 cm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.9 m |
| Total Tape Thickness (Imperial) | 125 mil |
| Total Tape 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 | Silicone Treated Paper |
| Primary Liner Thickness (Imperial) | 3 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Temperature Performance Short-term | 180°F (82°C) |
| Temperature Performance Long-term | 150°F (70°C) |
| Shelf Life | 24 months |
| Units per Case | 18 rolls |
| Smallest Saleable Unit | Roll |
| Application Type | Sealing, Window and Door Glazing |
| Indoor/Outdoor | Indoor/Outdoor |
| Foam Type | Open-cell |
| Industries | Appliance, Construction, General Industrial, Specialty Vehicles, Transportation |
| UPC | 00051131064478 |
| 3M ID | 7000048516 |
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