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DURO-GRIP CR-20 INSULATION ADHESIVE
®
DETERMINING BEAD SPACING: 8. Do not use on any roof deck that shows signs of
deterioration or loss of integrity.
1. Apply CR-20 per the “Directions for Use” section.
9. Do not use on excessively dirty or grease laden
2. For any project located in an area with the design surfaces.
wind speed greater than 120 mph or a roof deck
height greater than 100 feet, the Duro-Last 10. Do not use after expiration date.
Engineering Services Department must determine
the bead spacing pattern to be used. Otherwise, STORAGE AND HANDLING:
use the guidelines below.
1. The “A” and “B” tanks should be stored between
3. The spacing between beads of CR-20 is less in 45 and 95° F (7 – 35° C). The shelf life at these
the perimeter area of the roof than in the main temperatures is 18 months from the date of
field area to compensate for higher wind uplift production.
pressures.
2. Follow instructions on the “A” and “B” boxes for
4. The width of the perimeter area is defined as the overnight and longer term storage.
lesser of either 40% of the building eave height or
10% of the lesser roof plan dimension, but in no TABLE 1. TYPICAL PHYSICAL PROPERTIES
1
1
case less than 6 feet. The remainder of the roof is Product A – Component B – Component
the field area. Polymeric
Base Isocyanurate Polyol Amines
a. Perimeter area: apply beads 6 inches on
center. Blowing Agent 134a 134a
Physical Form Liquid Liquid
b. Field area: apply beads 12 inches on center.
5. Use the bead spacing above for all layers to be Net Weight (tank) 40.0 lbs. 35.0 lbs.
applied with CR-20. Specific Gravity 1.23 1.1
(77° F/25° C)
6. Refer to Table 2 for the estimated coverage per Color Light Brown Amber to Brown
each A/B Tank Kit based on bead spacing.
Volatile Organic 0 g/L 135.6 g/L
Compounds (VOC)
LIMITATIONS: VOC when used as
1. Maximum size of insulation board to be attached intended with both 67.5 g/L
with CR-20 is 4 x 4 foot (1.2 x 1.2 m). parts
Flash Point (TCC) >200° F (>93° C) >200° F (>93° C)
2. Maximum size of cover board to be attached with Auto Ignition
CR-20 is 4 x 8 foot (1.2 x 2.4 m) Temperature >600° F (>315° C) Not Determined
3. The adhesive temperature must be between 70° Viscosity (77° F/25° C) 130 cps 150 cps
F and 90° F (21 – 32° C) when applied. This Mix Ratio 1.14 1
ensures that the proper mixing ratio is maintained 1 Technical information and data should be considered representative
during installation and will give the best yield per or typical only and should not be used for specification purposes.
tank kit. When the adhesive temperature falls
outside of this range the tanks may take several TABLE 2. TYPICAL PROPERTIES – MIXED COMPONENTS
hours to adjust to an acceptable temperature.
Therefore, keeping the tanks in a warm Properties Mixed Components
environment overnight during cold weather Open Time (2.5-inch bead) 1.5 – 5 minutes*
months and keeping the tanks from getting to hot Work Life in Mixing Nozzle 1 minute*
in the summer will avoid delays during Time to Tack Free 5 – 12 minutes*
installation. Time to Handling Strength 4 – 8 minutes after bonding*
4. The substrate temperature that the adhesive is Time to Full Cure 24 hours
applied to must be at least 40° F (5° C) and rising. Coverage
5. Do not use during inclement weather. 2.5-inch beads, 12 inches o.c. 2,000 sq-ft per A/B Tank Kit
(field area)
6. Concrete and gypsum decks must be cured 2.5-inch beads, 6 inches o.c.
before applying CR-20. (perimeter area) 1,000 sq-ft per A/B Tank Kit

7. Do not use on wet surfaces. Do not install * Times may be affected by temperature and weather conditions.
CR-20 on a wet surface. Take whatever
precautions are necessary to ensure that the
surface is dry during the application and curing of
the CR-20.

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Duro-Last, Duro-Grip, Duro-Guard and “World’s Best Roof” are registered trademarks owned by Duro-Last, Inc.
Created: 01/01/2009 Revised: 05/20/2010, 12/30/2015, 03/20/2017