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32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf

CONTENTS CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL INDEX 326 Technical Data Lexel Sheet Clear, all purpose gap sealant for interior and exterior use Uses The high clarity of Lexel (up to 19 times clearer than translucent silicone sealants) make it ideal for a wide range of gap filling and joint sealing applications where a high clarity sealant is required. Uses include, trim, countertops, splashbacks, sinks, tile thresholds, windows, doors, eaves, roof tiles, guttering, vents, ductwork, flashings and skylights. Lexel offers primerless adhesion to the following materials; Perspex, copper, most plastics, polycarbonate, polystyrene (except polystyrene foam), aluminium - powder coated or annodised, chrome, nylon, fibreglass, steel, PVC, ABS, kitchen laminates, concrete, masonry, ceramics and terra-cotta. Advantages „ High clarity allows colour compatibility with all building materials „ Easy to apply „ Can be applied to wet or dry surfaces „ Suitable for interior and exterior applications „ Does not yellow with sunlight exposure „ Excellent unprimed adhesion „ Paintable „ Tougher than silicone „ Tear resistant „ High joint movement capability „ Easy to repair Description Lexel is a non-sag, co-polymer based joint sealant which dries by solvent loss to form an almost ‘water clear’ elastomeric joint sealant. It has excellent adhesion to a wide range of construction materials and maintains its adhesion even after 7 days continuous water immersion. Properties Form: Easy gunable, non-sag paste Colour: Clear Physical or chemical Dries by solvent loss change: Tack free time: 30 min @ 23°C 65% RH Drying time: 2-4 days @ 23°C 65% RH Full cure: 1-2 weeks, 23°C 65% RH Clarity: 13 NTU above 5°C Hardness: 25 Shore A (1 month cure) Slump: 2 mm max @ 23°C Elastic recovery 100% Approx 96% recovery elongation for 1 minute: following Application temperature: 5°C to 45°C Service temperature: -30°C to 90°C Application Instructions Surface preparation Surfaces must be structurally sound and free of dirt, oil, release agents and other residues. Old putties and sealants must be completely removed using a scraper and a heat gun. Priming Good adhesion is normally obtained to clean, sound surfaces without the use of a primer. On metal, powder coated aluminium and glass, a solvent wipe with Solvent 10 and a clean rag should remove most oils and contaminants. Gun Loading Lexel is supplied in a 270g sealant cartridge which is loaded into a suitable cartridge gun. Cut the cartridge nozzle at a 45° angle to achieve the required bead diameter. Puncture the inner seal with a long nail or screw driver. Squeeze the trigger slightly to bring the sealant to the tip of the nozzle. Application In movement joints wider than 10 mm, a foam backing rod should be installed if the rebate depth permits. Apply masking tape where necessary to ensure a straight uniform application of the sealant and to allow for easy clean up after surface tooling. If using Lexel indoors, make sure that the room is well ventilated and ensure that no ignition source is present before commencing sealant application. When applying the sealant, hold the gun at a 45° angle so that the cut angle on the nozzle is parallel to the surface. Use sufficient trigger pressure to force the sealant out of the nozzle at a smooth controlled rate while matching the sealant extrusion speed to the movement of the gun along the joint. Start the sealant application at a corner and drag the gun towards your body with a smooth action while trailing a uniform sealant bead. December 2009


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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