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7 Bonding primary Joint preparation <br /> systems All tapered systems must be clean,dry and warm for a proper bond. <br /> ( „ Clean:Pipe is shipped from the factory with end protectors.Avoid contamination from <br /> fingerprints,petroleum fumes,mist and condensation as these are adverse to good <br /> bonding.If a taper becomes dirty,sand it with emery cloth.Never touch the bonding <br /> surface with bare hands after cleaning or sanding as this will leave an oily deposit. <br /> r——————-————-- Dry:Adhesive will not bond to a wet surface.If the taper is wet or moist,dry it with a <br /> I <br /> The hardener contained in the I blow dryer or heat gun.Do not overheat or burn the pipe. <br /> adhesive kit may burn the skin. <br /> Warm:Below 50°F(10°C),warm the taper with a blow dryer or heat gun.For best <br /> Avoid inhaling the vapors.Read and I <br /> observe the label precautions. results,adhesive should be at least 50°F when used.Do not store kits in areas above <br /> 100°F(38°C),below 32°F(0°C),or in the direct sunlight during warm weather.In cold <br /> L———————— J weather warm the resin to at least 50°F but not above 100°F to permit good mixing and <br /> easier application. <br /> Mixing Ameron B20 adhesive <br /> • Combine all of both components in the mixing container in the supplied <br /> proportions. <br /> • Never try to split a kit. <br /> • Mix thoroughly with the mixing stick until all streaks are gone and the adhesive <br /> has a smooth,uniform color.Mixed adhesive color is red. <br /> • Do not allow moisture to get into the can. <br /> B20 adhesive is also available in a dual cartridge dispenser.The adhesive is dispensed <br /> through a static mixer and requires no further mixing before being applied to the <br /> bonding surfaces. <br /> Begin by coating the cut ends of the pipe <br /> with adhesive.Then apply a thin,even coat of <br /> h mixed adhesive to the inside of the bell and <br /> to the tapered spigot ends(indicated by <br /> shading)or to the entire tapered section in <br /> fittings or adapters,completely wetting all �'✓ <br /> machined surfaces with the adhesive.Wipe <br /> off excess adhesive with the spatula <br /> provided in the kit. <br /> Applying Ameron B20 adhesive <br /> Excessive amounts of adhesive may cause flow restriction inside the pipe when the <br /> adhesive has cured,or may result in'hydraulic backout'as the adhesive cures. <br /> Hydraulic backout occurs when excess adhesive prevents the joint from maintaining <br /> an interference fit and the spigot backs out of the bell during cure. <br /> Making the joint <br /> After aligning the mating surfaces so that they may be brought together <br /> in a straight line: <br /> • Insert spigot all the way into the bell. <br /> • Twist one quarter of a turn when pushing together to distribute adhesive evenly <br /> and to achieve an interference fit. <br /> • Do not cock the joint. <br /> • Over-insertion of the joint may collapse the spigot and cause a leaky joint. <br /> • Under-insertion of the joint may also cause a leaky joint. <br /> • Do not drive the joint together with a hammer. <br /> • Do not disturb the joint while the adhesive is uncured. <br /> r————————————-� • \ Do not move adjacent pipe and fittings until adhesive has set. <br /> 1 Do not use any type of hammer or I pot life/cure times for Ameron B20 adhesive <br /> 1 mallet to make up the joint. <br /> L__—_________J Pot life is measured from the time the hardener and resin are first mixed until the <br /> adhesive starts to thicken and harden and no longer can be used.Do not use adhesive <br /> once the can has become hot. <br /> 9 <br />