3M Vent Tape 394 is a specialized white industrial tape with non-woven porous backing for foam-in-place insulation venting. Features high air/gas permeability, pressure-sensitive acrylic adhesive, and comes in 24-roll cases of 2-inch wide by 36-yard rolls with 4 mil thickness.
3M™ Vent Tape 394 is a specialized industrial adhesive tape featuring a unique non-woven porous backing designed for high air and gas permeability applications. This white tape measures 2 inches wide by 36 yards long with a 4 mil thickness, and comes in cases of 24 rolls. The tape is specifically engineered for foam-in-place insulation processes in appliance manufacturing, where it must allow air and gases to escape while keeping foam solids in place. The non-woven synthetic backing provides excellent conformability and good burst strength, minimizing voids and reducing cleanup requirements during manufacturing operations.
The pressure-sensitive acrylic adhesive formulation holds strong to a wide variety of surfaces, making it suitable for multiple substrate types including foam, plastic, and metal. 3M™ Vent Tape 394 meets most typical outgassing requirements for refrigerator and freezer manufacturing, where precise venting during the foam-in-place process is critical for product quality. The tape's unique air-permeable backing ensures that foam-in-place insulation stays properly positioned inside door and appliance cavities while eliminating voids that could compromise insulation effectiveness. With an 18-month shelf life and maximum operating temperature of 120°F (49°C), this tape is ideal for industrial manufacturing environments requiring reliable performance and consistent results.
This product is formulated for industrial and occupational use only and is not intended for consumer sale or home use. Each roll provides 36 yards of continuous tape coverage, and the 24-roll case packaging makes it economical for high-volume manufacturing operations. The tape's proven performance in appliance manufacturing has made it an industry standard for foam-in-place insulation venting applications.
Key Features
- Unique non-woven porous backing with high air and gas permeability
- Pressure-sensitive acrylic adhesive for strong bonding to multiple surfaces
- Meets most outgassing requirements for foam-in-place insulation processes
- Excellent conformability with good burst strength for minimal voids
- Ideal for appliance manufacturing including refrigerator and freezer production
Technical Specifications
| Specification |
Value |
| Product Name | 3M™ Vent Tape 394 |
| Part Number | 394 |
| UPC Code | 00021200137921 |
| Product Color | White |
| Overall Width (Imperial) | 2 inches |
| Overall Width (Metric) | 50.8 mm |
| Overall Length (Imperial) | 36 yards |
| Overall Length (Metric) | 32.91 meters |
| Total Tape Thickness (Imperial) | 4 mil |
| Total Tape Thickness (Metric) | 0.1 mm |
| Backing Material | Non-woven synthetic |
| Adhesive Type | Acrylic, Pressure-Sensitive |
| Number of Adhesive Sides | Single-sided |
| Adhesion Strength (Imperial) | 12 oz/inch |
| Adhesion Strength (Metric) | 13 N/100mm |
| Tensile Strength (Imperial) | 6 lb/inch |
| Tensile Strength (Metric) | 10.5 N/100mm |
| Elongation at Break | 18% |
| Maximum Operating Temperature (Fahrenheit) | 120°F |
| Maximum Operating Temperature (Celsius) | 49°C |
| Shelf Life | 18 months from date of manufacture |
| Product Form | Roll |
| Units per Case | 24 rolls |
| Smallest Saleable Unit | Roll |
| Performance Level | Specialty |
| Brand | 3M™ |
| Product Type | Tape |
| Application | Outgas venting in appliances |
| Industry | Appliance Manufacturing |
| Intended Use | Industrial and occupational use only |
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