Vent Closures

Em-Seal is a self-adhering tape seal made from resilient, open-cell polyurethane foam impregnated with a water-based acrylic-modified asphalt emulsion and then compressed to a sealing density level appropriate to the application. Typically, higher compression levels are required for watertightness in water run-off applications; lower compression can be used, for example, for snow seals at roof ridges.

Em-Seal replaces and outperforms liquid and butyl-tape sealants as well as closed-cell and unimpregnated open-cell foam closures.

Em-Seal sealant tape is used to seal out dust, air, wind-driven snow, and moisture through joint details in metal buildings and roofs. Em-Seal is ideal as a filler in expansion/compression joints subject to movement from thermal expansion and contraction, and as a gasket in mechanically fastened, non-moving applications such as lap seams. Em-Seal is suitable for use against metal, plastic, wood, concrete, and other materials common in
metal building structures.

• Watertight at 80% Compressed
• Stops Flowing Water at 75% Compressed
• Blocks Air and Acoustic at 68%
• Restricts Hot, Cold, Dust at 18%
• Will not dry out and become brittle
• UV-stable
• Highly resistant to bugs and vermin
• Will not extrude from between joints like caulk or butyl tapes
• Conforms to contours and fills gaps
• Maintains a seal during thermal expansion and contraction of building panels
• Excellent compressibility and recovery (minimal compression set)
• Good thermal and sound insulator
• No shrinkage or blow-out due to closedcell breakage
• Supplied with self-adhesive on one side. After removal of packaging, material begins gradual expansion – more slowly in cold weather than in hot.
• Sold by the piece.