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<br /> <br />C-BUCK Engineering <br /> <br />FL #: FL 8068.1 <br />Date: 11/30/06 <br />Report No.: 06-168-NS-16-S4W <br />Page 30f6 <br /> <br />Specialty Structural Engineering <br /> <br />C-Buck, Inc. Florida Certificate of Authorization # 8064 <br /> <br />Surface Preparation: <br /> <br />Application: <br /> <br />Storage: <br /> <br />Shelf Life: <br /> <br />DIRECTIONS FOR USE <br />3M Scotch-Seal™ Polyurethane Adhesive Sealant 560 <br /> <br />Surfaces to be sealed or bonded shall be clean and dry. Surfaces shall be <br />free from grease, mold release, oil, water/condensation, and other <br />contaminates that may affect the adhesion of the sealant. Abrading with <br />180 to 220 grit abrasive followed by a solvent wipe will improve the bond <br />strength. Suitable solvents include 3MTM Citrus Based Adhesive <br />Remover, 3MTM Scotch-GripTM Solvent No.3 or methyl ethyl ketone <br />(MEK). <br /> <br />Note: <br />Alcohol will interfere with the curing process and extra care must be <br />taken when using alcohol as a cleaning solvent to prevent any contact <br />with the sealant. <br /> <br />Puncture seal in nozzle and knock out thin seal at cartridge bottom before <br />placing in caulking gun. (For flex packs cut off the small crimp at the end <br />and then place in caulking gun barrel with the open end up). Assemble tip <br />and retaining ring on gun, cut tip to desired size. Product should be used <br />within 24 hours after seal is punctured and should be pressed firmly into <br />the joint to ensure adequate contact of the sealant with the substrate. <br />Apply product when temperatures are between 400F (4 0c) and 1000F <br />(380C). Do not apply on frozen surfaces or wet surfaces. Do not apply <br />over silicones or in the presence of curing silicones. A void contact with <br />alcohol and solvents during curing. Sealants can be tooled immediately <br />after applying to give desired appearance. <br /> <br />3MTM Scotch-Seal™ Polyurethane Sealant 540 and 3MTM Scotch-Seal <br />Polyurethane Adhesive Sealant 560 must be stored in the original, <br />unopened containers below 900 F (320C) for maximum shelf life. Rotate <br />stock on a "first in-first out" basis. <br /> <br />When stored at the recommended condition s in original unopened <br />containers, Scotch-Seal 540 and 560 have a shelf life of 12 months after <br />date of manufacture. <br />