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manufacturers. <br />E. Do not paint sealant, unless recommended by sealant and paint manufacturer. <br />3.02 PREPARATION <br />A. Protect finished surfaces adjoining by using masking tape or other suitable materials. <br />B. Clean and prime joints before starting any caulking or sealing work. <br />C. Thoroughly clean joints and spaces of mortar and other foreign materials. Cleaning agent <br />shall be Xylol or similar non -contaminating solvent to remove any film from metal surfaces. <br />Masonry or concrete surfaces shall be brushed or air jet cleaned. <br />D. Joint Requirements <br />1. All joints and spaces to be sealed in exterior work shall be less than 1/2 inch deep <br />and not less than 1/4 inch wide. If joints in masonry are less than that specified <br />herein, the mortar shall be cut out to the required width and depth. All joints and <br />spaces to receive sealant shall be completely prepared and thoroughly dry before <br />installation of sealant. <br />2. Unless otherwise specified, joints and spaces which are open to a depth of 1/2 inch <br />or greater shall be solidly filled with back-up material to within 1/4 inch of the surface. <br />Back-up material shall be packed tightly and made continuous throughout the length <br />of the joints. Bond breaker shall be applied as required. If joints are less than <br />1/4 inch deep, the back-up materialmay be omitted, a bond breaker substituted and <br />the joint completely filled with sealant. The back-upmaterial shall not project beyond <br />the 1/4 inch depth of the open space in any joint. The following width -to -depth ratio <br />table shall be adhered to, unless otherwise recommended by manufacturer. <br />30048-005: 5/30/2012 07900-4 North Olmsted Phase 2 <br />Joint Width <br />Sealant Depth <br />Minimum Maximum <br />% inch 1/4 inch 1/4 inch <br />Over 1/4 inch to 1/2 inch 1/4 inch Equal to width <br />Over 1/2 inch to 1 inch 1/2 inch Equal to width <br />Over 1 inch to 2 inch 1/2 inch 1/2 of width <br />3.03 APPLICATION <br />A. Exercise care before, during, and after installation so as not to damage any material by <br />tearing or puncturing. All finished work shall be approved before covering with any other <br />material or construction. <br />B. Apply sealant by an approved type of gun except where the use of a gun is not practicable, <br />suitable hand tools shall be used. Avoid applying the compound to any surface outside of <br />the joints or spaces to be sealed. Mask areas where required to prevent overlapping of <br />sealant. <br />C. All joints shall be waterproof and weathertight. <br />D. Point sealed joints to make a slightly concave joint, the edges of which are flush with the <br />surrounding surfaces. Exposed joints in the interior side of the door and other frames shall <br />be neatly pointed flush or to match adjacent jointing work. <br />E. Adjacentmaterials which have been soiled shall be cleaned immediately and the work left in <br />neat and clean condition. <br />F. Comply with sealant manufacturer's written instructions except where more stringent <br />requirements are shown or specified and except where manufacturer's technical <br />representative directs otherwise. <br />3.04 ADJUSTMENT AND CLEANING <br />A. Remove misplaced sealant compounds promptly using methods and materials <br />recommended by the manufacturer, as the work progresses. <br />B. Allow sealants to cure and remove protective edging, of doors, louvers, saddles windows <br />