Lucas #734 Mod-Bit Adhesive is manufactured from refined polymer modified asphalts, a special solvent blend and non asbestos reinforcing fibers. Formulated to spread easily and evenly at the recommended rate of application. #734 is designed as a cold process Inter-Ply Adhesive for SBS modified bitumen single-ply membranes. Cold process adhesives eliminate the need for hazardous torches and hot asphalt kettles. Lucas modified bitumen adhesives are easy to apply with minimal equipment, effort, and cost. #734 may also be used to adhere Polyisocyanurate, perlite, wood fiber insulation, fiberglass, and organic base sheets.
APPLICATION
Lucas Mod-Bit Adhesives should only be applied to surfaces that are sound, clean , and dry. Temperatures should be a minimum of 40 degrees F and there should be not threat of rain. The adhesive may thicken in cold weather. To improve cold weather applicability, store the adhesives in a warm place prior to using. Apply directly from the can, DO NOT THIN! The SBS modified Bitumen sheets should preferable be cut into sections less than 20 ft. in length and allow to relaz and flatten out before being installed. All laps should be a minimum of 4 in. wide. All laps should be rolled with a weighted roller and end laps should be weighted to ensure a proper bond. A bead of adhesive should be evident at all seams. The adhesive may be left open for short time before the modified roll is embedded to allow some of the solvent to evaporate and improve the initial bond. This time period will very significantly with weather conditions and the applicator should be careful not to allow the adhesive to set up or skin over before the membrane is installed. Equipment and foot traffic should not be permitted on the new roof until the adhesive has fully cured in order to prevent voids or blisters from forming at pressure points. Lucas #734 Brush Grade should be applied evenly at a rate of 1.5 to 2 gallons per 100 sq. ft. depending upon absorbing of the substrate. It may be applied with either a brush, roller, suitable spray equipment, or the preferred method on smooth surfaces, a Notched Squeegee with notches 1/4 in. wide and 1/8 in. deep spaced 1 in. on center. Excessive rates of application may damage the membrane and prolong curing time. Cure time will be between 24 and 48 hrs.
CAUTION
Warning! Combustible Liquid and Vapor
Contains distillates. Keep away from heat and open flames. Avoid prolonged or contact with or inhalation of solvent fumes. A NIOSH approved respirator with organic vapor cartridges is recommended. Do not take internally. If swallowed do not induce to vomiting. Contact medical personnel immediately.