3M 7811 3340 2-1/2 in. x 50 yds. Silver 4.0 mil Foil Tape

The 3M Foil Tape 3340 is ideal for sealing rigid fiberglass duct boards and flexible air duct systems. Our tape meets requirements for UL 181 A-P and UL 181 B-FX Listings as a measure of reliability and quality standards. 2.0 mil aluminum foil backing is ideal as a vapor seal tape for duct closure.

• Listed for both UL181A-P and UL181B-FX
• Replaces mechanical fasteners for rigid duct board
• Thermally conductive backing helps heating and cooling efficiency
• Permanent acrylic adhesive combined with the durable 2.0 mil backing provides long service life

3M 3340 aluminum tape comes in a 2 1/2 in width, 50 yd length, uses an acrylic adhesive and is packaged 20 rolls per case. Can be used in the following temperature range: -30 F to +250 F. Provides a tensile strength of 20 lb/in. When purchasing this product, consider the thickness. The variances in thickness often make an important difference in proper performance. This aluminum tape has a 4 mil total thickness. In addition to the other properties this product is flame retardant. This aluminum tape meets the following standards: UL 181A-P, UL 181B-FX. Specifications
Specifications:

Conductive or Non-Conductive Adhesive: Non-Conductive

Application: Duct Work

Flame Retardant: Flame Retardant

3M Number: 3340

Standards Met:

• UL 181A-P
• UL 181B-FX