Mix well, and apply only to clean, dry, oil-free surfaces. For best results, the adhesive should be brush-applied in a thin, uniform coat to both bonding surfaces. Allow the adhesive to tack prior to joining both surfaces. Avoid open time of more than 10 minutes. KingGlue 520 Adhesive bonds instantly, so pieces must be positioned accurately as contact is made. Moderate pressure should then be applied to the entire bonding area to insure complete contact. It is recommended that the adhesive be applied at temperatures above 40°F (4°C) and not on heated surfaces. Where application between 32°F and 40°F (0°C and 4°C) can not be avoided, exercise more care in applying the adhesive and closing the joint. Applications below 32°F (0°C) are not recommended. Where lines and tanks that are insulated and will operate at hot temperatures, KingGlue 520 Adhesive must cure a minimum of 36 hours at room temperature to attain heat resistance for insulated pipe to 25°F (120°C) and insulated tanks and equipment to 180°F (82°C). Adhesive-bonded seams and joints of Kingflex Pipe Insulation must cure before finishes are applied. Where the insulation is installed by adhering seams and butt joints, the adhesive must cure 24 to 36 hours. Adhesive-bonded seams and joints of Kingflex Sheet Insulation must cure before finishes are applied. Where the insulation is installed by adhering seams and butt joints only, the adhesive must cure 24 to 36 hours. Where the insulation is installed against surfaces with full adhesive coverage, requiring wet adhesive at joints, the adhesive must cure seven days.KingGlue 520 Adhesive is an air-drying contact adhesive that is excellent for joining seams and butt joints of Kingflex Pipe and Sheet Insulation for line temperatures up to 250°F(120°C). The adhesive may also be used to apply Kingflex Sheet Insulation to flat or curved metal surfaces that will operate at temperatures up to 180°F (82°C). KingGlue 520 will make a resilient and heat-resistant bond with many materials where the use of a solvent-base neoprene contact adhesive is suitable and desirable.Extremely flammable mixture; vapors may cause flash fire; vapors may ignite explosively; prevent buildup of vapors—open all windows and doors—use only with cross ventilation; keep away from heat, sparks, and open flame; do not smoke; extinguish all flames and pilot lights; and turn off stoves, heaters, electric motors, and other sources of ignition during use and until all vapors are gone; close container after use; avoid prolonged breathing of vapor and prolonged contact with skin; do not take internally; keep away from children. Not for consumer use. Sold only for professional or industrial application.