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Technical Dayta Sheet Compedium

CONTENTS INDEX 318 Technical CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL Data Sheet Fosroc® Hilastic 44 Flexible, one-component, acetoxy cure silicone sealant for glass, ceramics, aluminium Uses For sealing joints in: „ Glass and window construction „ Aquariums and display cases „ General bonding, sealing and insulation Advantages „ Ready to use „ Excellent adhesion „ Fast rate of cure „ Flexible at extremes of service temperature „ Durable, tough elastic seal Standards Compliance US Federal Specification TT-S-001543a Class A. Description Hilastic 44 is a one-component, gun applied, silicone sealant which uses an atmospheric moisture activated, acetoxy cure system. Hilastic 44 remains permanently flexible and weatherproof under a wide range of climatic conditions and has excellent adhesion to glass, ceramics, aluminium, stainless steel, paints and many plastics. Properties Data quoted typical for this product but does not constitute a specification. Form: Easy gunnable, non-slump paste Colours: Translucent and white Physical or chemical change: Chemical cure, acetic acid vapours emitted Application temperature: Above 5°C Service temperature: Minus 50°C - 150°C Skinning time: Approximately 10 minutes Hardness: 25 - 30 ( Shore A° ) Cure rate: 1 - 2 mm per day @ 23°C, 50% RH Movement accommodation factor: Maximum 30% total joint movement (± 15%) December 2009 Page 1 Chemical resistance to occasional spillage: Resistant to dilute acids and alkalis, soaps and detergents. Not resistant to organic solvents Water immersion: Suitable, once fully cured Application Instructions Preparation Joint faces must be sound, flat and free of surface irregularities, and completely dry, clean and frost free. Oil, grease, etc may be removed using Solvent 10. For specific advice on surface preparation consult your local Parchem office. Priming Hilastic 44 has excellent adhesion to many surfaces without the use of a primer, however priming is always recommended, particularly for moving joints. This will greatly assist in ensuring the surface is clean and sound, as well as improve adhesion. The following primers are recommended: Primer 9: Used on PVC, fibreglass and many other plastic surfaces Primer 11: Used on glass, ceramics, aluminium and stainless steel Consult Parchem for specific advice on priming and surface preparation on other materials. Apply the appropriate primer to the joint surface and allow to dry for at least 30 minutes. Surfaces which have not been sealed within 8 hours of priming should be reprimed as described above. For moving joints, the sealant should not be allowed to bond to the back of the joint - apply a polyethylene bond breaker tape or use Expandafoam* backing rod. Application Fit the cartridge of Hilastic 44 into any suitable cartridge gun, and gun firmly into the joint. Ensure that the sealant is forced well against all the joint surfaces to achieve good surface wetting and thus optimum adhesion. Guide the nozzle along the joint gradually, applying even pressure to the trigger. The joint must be filled completely at all points. Tooling Immediately after application the sealant should be tooled. Use a smooth, convex tool to produce both the required surface finish and to assist in further forcing the sealant into good contact with the joint faces. Cleaning All soiled equipment should be cleaned promptly, as cured sealant is very difficult to remove. Wash with, or soak in Solvent 10 - uncured Hilastic 44 is readily removed while cured material will swell and soften after some time and may then be removed with minimum effort. December 2009


Technical Dayta Sheet Compedium
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