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GW-14-A <br /> Page 3 <br /> C. Primer: GacoFlex E-5320 two-component Epoxy Concrete Primer. <br /> CCD. Flashing and Joint Reinforcing Fabric: Gaco Western 66B and 66S Polyester Reinforcing Tape. GacoFlex NF-621 <br /> Neoprene Sheet Flashing and related materials as required for flashing drains, base angles, etc. <br /> E. Other Materials Required: Thinner and cleaner, reinforcing materials and sealant supplied. <br /> PART 3-EXECUTION <br /> 3.1 EXAMINATION <br /> A. Verify that substrate is ready to receive work;surface is clean, dry and free of substances that could affect bond. <br /> B. Verify that the plywood shall conform to U.S. DOC PS 1 or CSA 0325 and shall carry the grade trademark of the <br /> Engineered Wood Association -APA AB EXT or APA AC EXT are acceptable. Underlayment grade plywood (APA <br /> AC EXT Underlayment)with solid, plugged cross bands under the face veneer is recommended for commercial <br /> installations. Refer to Gaco Western's General Instruction GW-2-3 for complete information on the installation and <br /> fastening of plywood. <br /> Unacceptable Grades: APA C-D EXT,APA C-C EXT, Exposure 1 markings, oriented strand board (OSB), <br /> waferboard and Lauan or Mahogany plywood are NOT suitable substrates for liquid-applied coating systems.This is <br /> due to poor dimensional stability, weak glue lines which allow buckling or lifting of the top ply, and excessive <br /> splintered, leafed and raised surface grain. <br /> C. Do not begin the work until the concrete substrate has cured 28 days and/or has achieved a moisture content of no <br /> greater than 6.8%. <br /> cD. Prior to application of waterproofing perform calcium chloride test, to verify a moisture content of 6.8% or less has <br /> ot been established. <br /> E. Verify that the concrete meets the requirements of the coating manufacturer. Refer to Gaco Western's General <br /> Instruction GW-2-1 for complete information on the installation and finishing of concrete. <br /> F.Verify with architect, general contractor and manufacture that substrate conditions are acceptable to <br /> receive waterproofing application. <br /> 3.2 PREPARATION <br /> A. Clean substrate to remove all surface contaminants. Refer to Gaco Western's General Instructions Section GW-1-1, <br /> Surface Preparation. <br /> B. Mask off all adjoining areas that will not receive the fluid applied waterproofing. <br /> C. Provide a suitable workstation to mix coating materials. <br /> 3.3 INSTALLATION <br /> A. Technical Advice: The installation of this waterproofing membrane shall be accomplished in the presence of, or with <br /> advice of the manufacturers technical representative. Contact nearest regional office for assistance. <br /> B. Concrete Primer: Apply one coat of GacoFlex E-5320 Primer by roller at the rate of 1 gallon per 200 square feet <br /> (3.78 L/9.3 m2).Allow 3 to 24 hours drying time. For maximum solvent resistance, see drying time directed in Gaco <br /> Western's General Instructions GW-2-2. <br /> Note: Drying times vary depending on weather conditions such as temperature, humidity and air movement. <br /> Made in the USA • gaco.com • 800.331.0196 <br />