Document YGOeVNGQyKD4YNZ9xNk7y52pD

A.I.A. F ILE NO . 2 1 -A -2 N .A.H .B. IN D EX NO . 3 4 0 BESTWALL GRABIT BESTWALL GRABIT (AN ADHESIVE) Wallboard Joint Compound itoNXMt'j [ CAUTION M MHWIBMi IMM* ' iM" ' net W|i6t si. us. 4^GEot=IQtA-PACIFIC! ii BYPBUM DIVISION CENERAL OFFICES PAOLI, PENNA. Grabit is an adhesive developed by Bestwall which permits direct attachment of gypsum wallboard to masonry walls. It may be used on poured concrete, cinder block or concrete block walls which are reasonably straight and true and are free from surface treatment, decoration, or protrusions. Grabit may be used on exterior walls which are above grade level without waterproofing. Grabit may also, be used to adhere gypsum wallboard to polystyrene insulation material. Adhesion is secure and permanent, with no need for furring strips or fasteners. After being mixed with water as directed, Grabit can be applied with blade or caulking gun. Only four 1" ribbons are needed for each 4' wide wallboard panel. The adhesive fills in all normal irregularities in the masonry. In 3 to 4 hours, Grabit sets hard, and joint taping and finishing operations may then be started. This adhesive may be used wherever there is need to attach gypsum wallboard to masonry walls: in homes, apartments, hotels, offices and plants. Eliminates all furring strips or fasteners Eliminates nail popping Adhesive is permanent No special preparation of surface needed Only water needed for mixing Easy to apply, only four strips to each wallboard Sets in 3 to 4 hours. Surface Preparation: Surfaces should be reason ably straight and true, free of fragments of mortar, splinters from forms, protruding reinforcing rods, etc. Surface out of alignment by 1" or more should be leveled by some suitable means. Coverage: Up to V* lb. per sq. ft. depending on roughness of base surface. Designed for direct attachment of gypsum wallboard to interior masonry walls (or to exterior walls which are above grade level without waterproofing). Can be used in residential, commercial, or industrial installations. Packaging: 50 lb. bags. Consistency: Dry powder, mixes with clean water to form a paste plastic enough to be applied with a caulking gun, yet stiff enough so that the bead will not sag or flow. Retains consistency for 214 hours or longer. Proper mixture is 50 lbs. of Grabit to 10 quarts of water. Fills in all normal irregularities in the masonry. Hardens permanently in 3 to 4 hours. On the back side of board, apply a 1" ribbon of Grabit to each edge, and two ribbons in the field of the board 16" from each edge. Use mechanical fasteners or a brace where necessarv to hold board in place until adhesive sets. To align joints, place a 2"x4" over the adjoining board edges and tap with a hammer. If boards are warped, use masonry nails to pull boards into alignment. Remove all droppings from face of boards before the adhesive sets. Complete instructions for mixing and applying are included on each bag. GP-67305 GEORGIA-PA Cl FIG / GYPSUM DIVISION COMMONWEALTH BUILDING, PORTLAND. OREGON 97204 SGP 0025785 A.I.A. FILE NO . 2 I-A -2 N .A .H .B . IN D EX NO. 3 4 0