Duro-Last Duro-Fleece CR-20 Membrane Adhesive - Manual (Page 2)

“Duro-Last”, “Duro-Fleece”, Duro-Guard and “World’s Best Roof” are registered marks owned by Duro-Last, Inc. 3/22/2013
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DURO-FLEECE ® CR-20 MEMBRANE ADHESIVE
Ordering:
Each A/B Tank Kit will adhere 2,000 square-feet of
Duro-Fleece membrane.
Component Item # Contains
A/B Tank Kit 1109
“A” & “B” Tanks, 8 Nozzles, Wrench,
Instruction Sheet
Hose/Gun Kit 1109-001
Hose and Gun. Order one Hose and
Gun Kit per four A/B Tank Kits.
Extra Nozzles 1109-002 Bag of 10 Nozzles.
Installation:
1. Limitations
a. The minimum product temperature before
application is 70 F (21-32C).
b. The minimum ambient and surface
temperature should be 40 F (4C and
rising).
c. Do not use during wet weather.
d. Do not use on wet substrates.
e. Do not use on dirty or greasy substrates.
f. Do not use on substrates that show signs of
deterioration or loss of structural integrity.
g. Do not use product after expiration date.
h. The factory selvage edge and the edge of the
membrane where hot-air welding will occur
must be protected from overspray of the Duro-
Fleece CR-20 Membrane Adhesive.
2. Retrofit-recover projects
a. Only adhere Duro-Fleece to an acceptable
substrate as listed on page 1.
b. The existing roof system must be investigated
to ensure that it is adequately attached.
c. Broken, delaminated, wet, or damaged
insulation or cover boards must be removed
and replaced prior to installation.
d. Existing Phenolic insulation must be removed.
3. Position Membrane
a. Position adjacent sections of Duro-Fleece
membrane so that they lay flat and overlap
correctly.
b. Fold the membrane sections to provide an
opening to the substrate to which adhesive will
be applied. See Figure 2 for an example.
c. Ensure that the edges of the membrane are
protected from contamination by the adhesive.
Such contamination will adversely affect the
seaming of the membrane.
4. Adhesive Application
a. Prepare tank set and applicator gun for use as
described on the "Directions for use" sheet.
b. Hold the gun 2 - 3 feet above the roof deck and
pointing downward. Pull the trigger and begin to
sweep the gun from side to side in order to
distribute the adhesive evenly on the substrate.
Apply the adhesive to match the pattern shown
in Figure 3 and at a coverage rate of 2,000
square-feet per A/B Tank Kit.
c. Replace nozzle tips after spraying has stopped
for 1 minute. Failure to do so will result in
improper mixing of adhesives.
5. Apply Membrane to Adhesive
a. The bonding time range of Duro-Fleece CR-20
Membrane Adhesive is 1-10 minutes from the
start of spraying, and will vary according to
ambient as well as the substrate temperature.
Use the table below to determine when to roll the
membrane into the adhesive.
Ambient / Deck
Temperature
Time Before Rolling
Membrane In
40 – 60 °F 6 – 10 Minutes
60 – 80 °F 3 – 6 Minutes
80 – 100 °F 1 – 3 Minutes
b. Roll the membrane into adhesive taking care not
to induce wrinkles into the sheet and not to
contaminate the edges with adhesive.
c. First, broom the membrane into the adhesive,
and then roll the membrane into the adhesive
using a 150 lb. roller. Care should be taken not to
damage the membrane or contaminate the edges
with adhesive.
d. Complete the seam between membrane sections
with a hot-air weld, minimum 1½ inch wide.
TABLE 1. TYPICAL PROPERTIES - BY COMPONENT
Product A
- Component¹ B - Component¹
Base
Polymeric
Isocyanurate
Polyol Amines
Blowing Agent 134a 134a
Physical Form Liquid Liquid
Net Weight
(cylinder)
40.0 lbs. 35.0 lbs.
Specific Gravity
(77°F/25°C)
1.23 1.1
Color Light Brown Amber to Brown
Volatile Organic
Compounds (VOC)
0 g/L 135.6 g/L
VOC when used as
intended with both parts
67.5 g/L
Flash Point (TCC) >200 °F (> 93°C) >200 °F (> 93°C)
Auto Ignition Temperature >600 °F (> 315°C) Not Determined
Viscosity
(77°F / 25°C)
130 cps 150 cps
Mix Ratio 1.14 1
¹ Technical information and data should be considered representative
or typical only and should not be used for specification purposes.