Specifications

National distributor shipping direct throughout the United States
to place orders or for more information:
800 / 876 / 0660
 fax 888 / 440 / 4219
Wisconsin 800 / 962 / 7015
 Wisconsin fax 920 / 757 / 6452
headquarters 40 Washington Street, Westborough, Massachusetts 01581 • www.efi.org/wholesale
Air Sealing Supplies
31
Duct Sealing Tips
It has long been known that a well installed and sealed
duct system increases equipment efficiency, health,
safety and comfort for the homeowner. By properly
installing and then sealing ducts, the contractor can
diminish the possibility of moisture and mold problems,
the potential for back drafting appliances, and the
potential of introducing pollutants to the living environment.
Tips on Using Mastic
• Seal all seams and joints by brushing on
• Use mastic along with mesh tape to bridge the gap
and strengthen the seal
• Water based — easy to apply and clean up
• Remains flexible over time as ducts expand & contract
Other Air Sealing products that EFI carries include vapor
barriers that get installed with high adhesion tape and
acoustical sealant, air tight electrical
boxes, caulking, weathe
rstripping
and exterior
penetration flashing.
Call the Wholesale
Division for further
information and
guidance.
TU-TUF VAPOR BARRIER
• White cross-laminated virgin poly sheeting;
made from high-density resins
• Use on warm side of outside walls; under concrete flooring;
around outside perimeter of foundations
• 6.4x more puncture resistant than low-density 4-mil poly
Vapor Permeance: 0.00741
Water Resistance: 100 dry indicator/hour
Tensile Strength: 8,507 psi, 34 lbs per inch width
Puncture Resistance: 275.8 beach units
5520.211 9' x 100' #4 White
5520.23 12' x 100' #4 White
5520.210 9' x 100' XF Translucent
5520.230 12' x 100' XF Translucent
FIRE BREAK CAULK
White Translucent
VAPOR BARRIER SEALING PRODUCTS
6800.021 Venture Construction Tape 2" x 216'
3500.4 Tremco Seam Sealant (quart)
6500.03 Deluxe Caulk Gun (quart)
Fire Break Caulk is a non-combustible filler
compound used for fire stopping applications
around pipes, ducts, vents, electrical wiring,
masonry and other penetrations in the
building envelope.
3500.65 Fire Break ASTM E-136, Residential,
Non Expanding, 4 hour rating
3500.66 Fire Break ASTM E-814, Commercial,
Intumescent, 8 hour rating
Mastic
RCD #6 is a cream colored non-toxic adhesive sealant used to seal
joints and seams of low to high velocity air ducts.
• Water based, fiber reinforced
• Elastomeric
3520.02 RCD #6 Mastic
2 Gallon Bucket
3520.04 RCD #6 Mastic
1 Gallon Bucket
3520.03 RCD #6 Mastic 11 oz Tube
3520.05 RCD #7 Mastic — 1 Gallon Bucket Grey
6800.061 Mesh Tape 3" x 150'
Butyl Foil Tape
• UL 181 B-FX Listed
• Meets all SMACNA pressure
and sealing classes
• Backing: 2 mil soft alum,
Adhesive: 15 mil bu
tyl
6800.301 Duct Sealant Butyl-Foil Tape 3"x100'
DUCT SEALING SUPPLIES