Duro-Grip CR-20
DURO-LAST® DURO-GRIP INSULATION ADHESIVE
Description:
Duro-Grip™ Insulation Adhesive is a two component
elastomeric polyurethane froth adhesive designed to adhere
both insulation and cover boards to various substrates. It can
also be used to adhere insulation boards together where
multiple layers are required.
Duro-Grip is applied in bead form directly to an approved
substrate. The “A” and “B” components are dispensed from two
pre-pressurized disposable cylinders using the hose and nozzle
kit. The insulation or cover board is placed onto the adhesive
and a chemical cure takes place several minutes after
application depending on temperature and weather conditions.
DATA SHEET
Duro-Grip contains less than 250 g/L of Volatile Organic
Compounds (VOC) and meets all VOC restrictions and
regulations in the United States. See Table 1 for VOC
information.
Duro-Grip is ideal for use when mechanical fastener penetration
into the roof deck is undesirable. Duro-Grip is approved for use
with many roof deck substrates, insulation and cover boards.
Structural concrete (poured-in-place)
Structural concrete (precast)
Lightweight structural concrete (pull test required)
Insulating concrete (pull test required)
Cementitious wood fiber planks
Gypsum decks (pull test required)
Steel - 22 gauge or thicker ("B" deck profile)
Plywood and OSB
Polyisocyanurate (flat or tapered)
Expanded polystyrene (EPS, flat or tapered)
Extruded polystyrene (XPS, flat or tapered)
DensDeck Roof Board
SECUROCK Gyp sum -Fiber Board
Various aged built-up roofs (pull test required)
Vapor retarders (contact Duro-Last for approved
product list)
A/B Tank Kit, Ho se/Gun Kit, Wrench and Nozzles
Duro-Grip is applied to substrate in 2.5 inch beads
Material Safety Data Sheet:
1. Review MSDS sheets for both "A" and "B" components
before working with the product.
2. MSDS available at www.duro-last.com.
Duro-Last: The Proven Performer®
www.duro-last.com
"Duro-Last " an d " The World's Best Roof" are registered marks owned by Duro-Las t , Inc.
1 of 4
800-248-0280
May 20, 2010
DURO-GRIP INSULATION ADHESIVE
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.
Do not use on wet surfaces. Do not install
7.
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.
TABLE 1. TYPICAL PROPERTIES - BY COMPONENT
Product
Base
Blowing Agent
Physical For m Liquid Liquid
Net Weight
(cylinder)
Specific Gravity
(77°F/25°C)
Color
Volatile Organic
Compounds (VOC)
VOC when used as
intended with both parts
Flash Point (TCC) >200 °F (> 93°C) >200 °F (> 93°C)
Auto Igniti o n
Temperature
Viscosity (77°F / 25 °C)
Mix Ratio 1.14 1
¹ Technical i n f o rmation and data should be conside re d represent ative
or typical only and should not be used for specification purposes.
TABLE 2. TYPICAL PROPERTIES - MIXED COMP O N ENTS
Proper ties Mixe d Component s
Open Time (2.5 inch bead)
Work L i fe in Mixing Nozzle
Time to Tack Free 5 - 12 minutes*
Time to Hand l ing Strength 4 - 8 minutes af ter bonding*
Time to Full Cure 24 hours
2.5 inch beads, 12 inches o.c.
(field area)
2.5 inch beads, 6 inches o.c.
(perimeter area)
* Times may be affected by temperature and weather conditions
A - Co mponent
Polymeric
Isocyanurate
134a 134a
40.0 lbs. 35.0 lbs.
1.23 1.1
Light Brown
0 g/L 135.6 g/L
>600 °F (> 315°C)
130 cps 150 cps
Coverage
¹ B - Co mponent¹
Polyol Amines
Amber To Brown
67.5 g/L
Not Determine d
1.5 - 5 minute s*
1 minute*
2,000 sq-ft per A/B T a nk Kit
1,000 sq-ft per A/B T a nk Kit
Duro-Last: The Proven Performer®
www.duro-last.com
"Duro-Last " an d " The World's Best Roof" are registered marks owned by Duro-Las t , Inc.
2 of 4
800-248-0280
May 20, 2010
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