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' 1 2. Type 4 Sealant: Maximum joint size shall be 3/8" x 1/2". <br /> 2 <br /> 3 B. Joints deeper than above shall have backup material installed to maintain specified depth. <br /> a <br /> 8 C. With Types 1, 2, and 3 sealants, a bond breaker shall be installed, unless backup material <br /> a is used, so that sealant bonds only to sides of joints. <br /> 1 7 <br /> a 3.03 SEALANT INSTALLATION <br /> 9 <br /> 1 10 A. Carefully and thoroughly clean surfaces with cleaner, and in manner recommended by <br /> 11 sealant manufacturer. <br /> 12 <br /> 13 B. Prime surfaces where recommended by sealant manufacturer. <br /> ' <br /> 14 <br /> 15 C. Apply sealants smoothly and uniformly. Mask surfaces each side of joints to protect <br /> 18 adjacent surface and to form straight even edges. <br /> 18 <br /> 18 <br /> 19 <br /> 20 <br /> 21 <br /> 22 <br /> 23 END OF SECTION <br /> r <br /> CAULKING AND SEALANTS <br /> 042894 079203 <br />