Duro-Last Duro-Grip CR-20 - Manual (Page 2)

Determining Bead Spacing:
1. Apply Duro-Grip per the "Directions for Use" section.
2. For any project located in an area with the design
wind speed greater than 120 mph or a roof deck
height greater than 100 feet, the Duro-Last
Engineering Services Department must determine
the bead spacing pattern to be used. Otherwise, use
the guidelines below.
3. The spacing between beads of Duro-Grip is less in
the perimeter area of the roof than in the main field
area to compensate for higher wind uplift pressures.
4. The width of the perimeter area is defined as the
lesser of either 40% of the building eave height or
10% of the lesser roof plan dimension, but in no case
less than 6 feet. The remainder of the roof is the field
area.
a. Perimeter area: apply beads 6 inches on center.
b. Field area: apply beads 12 inches on center.
5. Use the bead spacing above for all layers to be
applied with Duro-Grip.
6. Refer to Table 2 for the estimated coverage per each
A/B Tank Kit based on bead spacing.
Limitations:
1. Maximum size of insulation board to be attached with
Duro-Grip is 4 x 4 foot (1.2 x 1.2 m).
2. Maximum size of cover board to be attached with
Duro-Grip is 4 x 8 foot (1.2 x 2.4 m)
3. The product temperature must be between 70 °F and
90 °F (21 - 32 °C) when applied. This ensures that
the proper mixing ratio is maintained during
installation and will give the best yield per tank kit.
When the product temperature falls outside of this
range the tanks may take several hours to adjust to
an acceptable temperature. Therefore, keeping the
tanks in a warm environment overnight during cold
weather months and keeping the tanks from getting
to hot in the summer will avoid delays during
installation.
4. The substrate temperature that the product is applied
to must be at least 40 °F (5 °C) and rising.
5. Do not use during inclement weather.
6. Concrete and gypsum decks must be cured before
applying Duro-Grip.
7. Do not use on wet surfaces. Do not install
Duro-Grip on a wet surface. Take whatever
precautions are necessary to ensure that the surface
is dry during the application and curing of the
Duro-Grip.
8. Do not use on any roof deck that shows signs of
deterioration or loss of integrity.
9. Do not use on excessively dirty or grease laden
surfaces.
10. Do not use after expiration date.
Storage and Handling:
1. The "A" and "B" containers should be stored between
45 and 95 °F (7 - 35 °C). The shelf life at these
temperatures is 18 months from the date of
production.
2. Follow instructions on the "A" and "B" boxes for
overnight and longer term storage.
Duro-Last: The Proven Performer®
"Duro-Last" and "The World's Best Roof" are registered marks owned by Duro-Last , Inc.
www.duro-last.com 800-248-0280
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TABLE 1. TYPICAL PROPERTIES - BY COMPONENT
Product A - Component ¹ B - Component ¹
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.
TABLE 2. TYPICAL PROPERTIES - MIXED COMPONENTS
Properties Mixed Components
Open Time (2.5 inch bead) 1.5 - 5 minutes*
Work Life in Mixing Nozzle 1 minute*
Time to Tack Free 5 - 12 minutes*
Time to Handling Strength 4 - 8 minutes after bonding*
Time to Full Cure 24 hours
Coverage
2.5 inch beads, 12 inches o.c.
(field area)
2,000 sq-ft per A/B Tank Kit
2.5 inch beads, 6 inches o.c.
(perimeter area)
1,000 sq-ft per A/B Tank Kit
* Times may be affected by temperature and weather conditions
May 20, 2010
DURO-GRIP

INSULATION ADHESIVE