Duro-Last Duro-Fleece CR-20 User Manual

URO-FLEECE® CR-20 MEMBRANE ADHESIVE

DATA SHEET

Description:

Duro-Fleece component adhesive used for adhering Duro-Fleece

CR-20 Membrane Adhesive is a two

membrane to a variety of substrates in both new and re-roof applications. It is spray applied in a “splatter pattern” (Figure 2) onto an approved substrate. The splatter pattern should be evenly distributed and coarse textured with a thickness between ¼ and ½ inch (Figure 3).

Duro-Fleece CR-20 Membrane Adhesive contains less than 250 g/L of Volatile Organic Compounds (VOC) and meets all VOC restrictions and regulations in the United States.

Note: Only standard formulation may be used to adhere Duro-Fleece membrane. Do not use cold weather formulation for this application.

Acceptable Substrates:

The substrate onto which Duro-Fleece membrane is to be adhered must be properly prepared as described in the Duro-Fleece Adhered Roofing System Specification. The substrate must be smooth and level without significant surface irregularities or depressions. It must be clean, dry and free of grease, dust and loose debris. Do not apply to wet or damp surfaces. Concrete and gypsum decks must be cured prior to installation. The installing contractor is responsible for following applicable building, plumbing and electrical codes.

Duro-Fleece CR-20 Membrane Adhesive may be used to adhere Duro-Fleece membrane to the following substrates:

 Structural Concrete (poured in place or precast)  Gypsum (poured in place or precast)  Lightweight Concrete (insulating or cellular)  Wood (Plywood, OSB or Lumber)  Smooth Built-Up Roofs  Duro-Guard  DensDeck  DensDeck  SECUROCK  SECUROCK

Polyisocyanurate Insulation

Prime Roof Board

Roof Board

Gypsum-Fiber Roof Board

Glass Mat Roof Board

(BUR)

Figure 1. A/B Tank Kit, Hose/Gun Kit, Wrench and Nozzles

Figure 2. Applying adhesive in splatter pattern

Figure 3. Splatter Pattern

Adhesion Test:

When adhering to an existing roof, an adhesion pull test must be performed to determine the uplift value of the existing roofing system and the adhesion value of the new roof to the existing roof.

Precautions:

1. Read MSDS for Part “A” and Part “B” prior to using.

2. Wear proper personal protective equipment, such as gloves and eye protection, per the MSDS.

3. Each A/B Tank kit comes with a “Directions for Use” sheet which must be read prior to using the product. The sheet includes detailed instructions on how to set up the tanks, hose and gun in order to get the most efficient use of the adhesive. It also includes details on proper storage and disposal of the adhesive.

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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

Hose/Gun Kit 1109-001

Extra Nozzles 1109-002 Bag of 10 Nozzles.

“A” & “B” Tanks, 8 Nozzles, Wrench, Instruction Sheet

Hose and Gun. Order one Hose and Gun Kit per four A/B Tank Kits.

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.

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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

40 – 60 °F 6 – 10 Minutes

60 – 80 °F 3 – 6 Minutes

80 – 100 °F 1 – 3 Minutes

Time Before Rolling

Membrane In

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

Blowing Agent Physical Form 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) Auto Ignition Temperature

Viscosity (77°F / 25°C)

Mix Ratio ¹ Technical information and data should be considered representative

or typical only and should not be used for specification purposes.

Polymeric

Isocyanurate

134a 134a

Liquid Liquid

40.0 lbs. 35.0 lbs.

1.23 1.1

Light Brown Amber to Brown

0 g/L 135.6 g/L

>200 °F (> 93°C) >200 °F (> 93°C)

>600 °F (> 315°C) Not Determined

130 cps 150 cps

1.14 1

Polyol Amines

67.5 g/L

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