Professional 3/8 in x 36 yd urethane foam tape with acrylic adhesive for sealing, cushioning, and sound dampening in industrial applications. Charcoal gray, 125 mil thickness, 24 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 professional-grade industrial tape measures 3/8 inch wide by 36 yards long with a 125 mil thickness and comes in a case of 24 rolls. The charcoal gray foam design is specifically formulated to seal out air, dust, and light when compressed, making it ideal for critical sealing and cushioning applications across multiple industries.
The tape features excellent cushioning characteristics combined with high absorbency properties, making it perfect for dampening sounds and absorbing vibration in electronic applications such as printers, keyboards, computers, aircraft lights, and automotive dashboards. The open-cell foam construction, when compressed 50%, provides an effective air barrier and cushion in electronic equipment while maintaining the ability for necessary airflow to keep components cool. The silicone-treated paper liner protects the pressure-sensitive acrylic adhesive (3M™ Adhesive 430) until application.
This versatile industrial tape performs under a wide range of temperatures, with short-term performance up to 180°F (82°C) and long-term performance at 150°F (70°C). It offers high initial quick-stick to multiple substrates with excellent chemical resistance and superior shear holding strength. The tape is suitable for indoor/outdoor applications and is commonly used for register covers, recessed lighting, door and window seals, and cabinet seals. For industrial and occupational use only, this product meets stringent industry standards and is designed for trained professionals in manufacturing, construction, transportation, and specialty vehicle applications.
Key Features
- 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
- Pressure-sensitive acrylic adhesive (3M™ Adhesive 430) provides high initial quick-stick and excellent shear strength
- Temperature performance range from short-term 180°F (82°C) to long-term 150°F (70°C)
- Single-sided adhesive with silicone-treated paper liner for easy application and protection
Technical Specifications
| Specification |
Value |
| Brand | 3M™ |
| Product Number | 4318 |
| UPC Code | 00021200674761 |
| Overall Width (Imperial) | 0.37 in (3/8 in) |
| Overall Width (Metric) | 9.52 mm |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 32.91 m |
| Backing Material | Urethane |
| Thickness (Imperial) | 125 mil |
| Thickness (Metric) | 3.2 mm |
| Product Color | Charcoal Gray |
| Adhesive Type | Acrylic (3M™ Adhesive 430) |
| Number of Adhesive Sides | Single-sided |
| Density (Imperial) | 2 lb/ft³ |
| Density (Metric) | 32 kg/m³ |
| Primary Liner | Silicone Treated Paper |
| Primary Liner Thickness (Imperial) | 3 mil |
| Primary Liner Thickness (Metric) | 0.08 mm |
| Tensile Strength (Imperial) | 25 lb/in |
| Tensile Strength (Metric) | 170 kPa |
| Temperature Performance (Short-term) | 180°F (82°C) |
| Temperature Performance (Long-term) | 150°F (70°C) |
| Shelf Life | 24 Months |
| Smallest Saleable Unit | Roll |
| Units per Case | 24 Rolls |
| Application | Sealing, Window and Door Glazing |
| Indoor/Outdoor Use | Indoor/Outdoor |
| Industries | Appliance, Construction, General Industrial, Specialty Vehicles, Transportation |
| Foam Type | Open-cell foam |
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