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WB II ADHESIVE
PRECAUTIONS: For porous substrates, such as concrete
block, apply an initial light coating of
1. Read Safety Data Sheets (SDS) prior to using. adhesive as a seal coat. Allow the seal
2. Wear proper personal protective equipment, such coat to dry thoroughly prior to adhesive
as gloves and eye protection, per the SDS. application as described above.
3. Combustible. Do not expose to heat, flame or Do not allow adhesive to dry. Place
sparks. Do not smoke while applying. membrane into wet adhesive.
4. Use only in well ventilated areas and avoid Apply pressure to complete the bond.
breathing vapors.
5. Keep container closed when not in use. Use appropriate fastening or termination to
secure the membrane while the adhesive
6. When transferring adhesive between containers, dries.
ensure that both containers are grounded. g. Refer to the Duro-Last Adhered Duro-Fleece
7. Treat empty containers with caution since they Roofing System specification for guidelines
may contain flammable vapors. regarding Duro-Fleece membrane installation.
3. Duro-Last, Duro-Tuff and Duro-Last EV
INSTALLATION:
Membranes
1. General a. Using a 3/8-inch (medium) nap solvent
a. Do not exceed Open Time of 3 hours. resistant roller, apply evenly at a coverage
b. Apply to surfaces which are clean, smooth, rate of 140 – 180 square feet per gallon to the
dry and free of oil and grease. SUBSTRATE ONLY. The coverage rate will
vary depending upon the porosity of the
c. Only apply adhesive when the ambient substrate. Do not apply to non-porous
temperature is at least 50º F (10° C) and substrates.
rising. Adhesive must be stored between
60º F (15° C) and 80º F (26° C) for 24 hours b. Do not apply adhesive where hot-air welding
prior to installation. will be performed.
d. Stir adhesive vigorously by hand to achieve c. Adhesive should be wet or partially dried to a
homogeneous mixture prior to application. "wet" surface tack prior to bonding membrane.
e. Thinning the adhesive is not allowed. Dry time will vary according to weather
conditions.
2. Duro-Fleece Membrane d. Roll membrane onto the adhesive coated
a. Using a 3/8-inch (medium) nap solvent substrate slowly and evenly to avoid trapping
resistant roller, apply evenly at a coverage air and to minimize wrinkles.
rate of 100 – 120 square feet per gallon to the e. Apply pressure by means of a heavy roller or
SUBSTRATE ONLY. The coverage rate will push broom to ensure proper bonding.
vary depending upon the porosity of the
substrate. Do not apply to non-porous f. For vertical applications, apply adhesive to
substrates. BOTH the membrane and the substrate at a
rate of 180 square feet per gallon (for a net
b. Do not apply adhesive where hot-air welding coverage rate of 90 square feet per gallon).
will be performed. The coverage rate will vary depending upon
c. Roll the membrane into the adhesive the porosity of the substrate.
IMMEDIATELY after it is applied. Do not wait For porous substrates, such as concrete
for the adhesive to dry. Duro-Fleece block, apply an initial light coating of
membrane must be rolled into wet adhesive. adhesive as a seal coat. Allow the seal
d. Roll membrane onto the adhesive coated coat to dry thoroughly prior to adhesive
substrate slowly and evenly to avoid trapping application as described above.
air and to minimize wrinkles. Allow adhesive to dry to "finger tack" and
e. Apply pressure by means of a heavy roller then place membrane onto the substrate.
with a minimum weight of 150 pounds to
ensure proper bonding. Apply pressure to complete the bond.
f. For vertical applications, apply adhesive to the g. Refer to the Duro-Last Adhered Systems
substrate at a rate of 100 to 120 square feet specification for guidelines regarding
membrane installation.
per gallon. The coverage rate will vary
depending upon the porosity of the substrate.
www.duro-last.com 2 of 2 800-248-0280
Duro-Last, Duro-Fleece, Duro-Tuff, Duro-Guard and “World’s Best Roof” are registered marks owned by Duro-Last, Inc.
DensDeck is a registered mark owned by Georgia Pacific Gypsum LLC. Securock is a registered mark owned by USG Corporation.
Created: 01/01/2009 Revised: 01/22/2011, 07/11/2011, 10/08/2014
