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Technical Dayta Sheet Compedium

CONTENTS INDEX 316 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 Emer-Seal® Construction Silicone High joint movement accommodation, one-component silicone joint sealant for façade applications Uses For sealing moving or static joints in: „ Precast or in-situ concrete „ Curtain walls and lightweight cladding „ Tilt-up slabs „ Brick, blockwork, marble and granite facades „ Most building materials Advantages „ Ready to use „ Easy application „ Fast curing „ Service temperature range -50°C to +150°C „ Long life weathering performance „ High joint movement accommodation „ Excellent adhesion to most construction materials „ Will not stain porous construction materials such as concrete, marble or granite Description Construction Silicone is a one part, gun applied, neutral cure silicone sealant which cures rapidly to form a durable, weathertight seal. Construction Silicone remains permanently flexible and weatherproof under a wide range of climatic conditions. The unique polymers utilised in this ‘state of the art’ sealant combine to provide the outstanding weathering performance, for which silicone sealants are renown, with no risk of staining porous building materials. Design criteria Joint design: Moving joints should be designed and suited to minimise stresses imposed on the joint sealant. All movement joints should be designed with an optimum width to depth ratio of 2:1 with the overriding requirement that the sealant depth must not be less than 8 mm on non-porous surfaces and not less that 12 mm on porous surfaces. Bond breakers and joint fillers: In moving joints, the sealant must not be allowed to bond to the back face of the joint. Prevention of 3 sided adhesion is achieved by installing either a polyethylene bond breaker tape, or through the use a polyethylene foam backing rod. Properties Data quoted are typical for this product but do not constitute a specification. Form: Non slump thixotropic paste Colours: Emer-Seal colour range Movement accommodation factor: November 2011 Page 1 Plus 50% / minus 30% (80% total) Typical hardness Shore ‘A’: 18 - 25 Physical or chemical change: Chemical cure (non-acid) Application temperature: Minimum 5°C Service temperature: Minus 50°C - 150°C Tooling time: 20 minutes minimum @ 25°C, 65% RH Cure rate: Approx. 3 mm for 1st day at 25°C, 65% R.H then 1 mm / day thereafter Application instructions Preparation Joint faces must be sound and completely dry, clean and frost free. Oil, grease, curing compunds, form release agents, and all surface contaminants must be completely removed by grinding joint faces or by using Solvent 10. If it is necessary to apply Construction Silicone onto paints or other renewable surface coatings it is recommended that proposed system be carefully tested to ensure that adhesion is acceptable and properties of either the paint or the sealant are not adversely affected by long term contact. Construction Silicone is suitable for use directly onto powder coated metals and ColorBond steel surfaces. Priming Construction Silicone has excellent adhesion to most building surfaces without the use of a primer. For optimum results, particularly with moving joints, priming is always recommended. Primer 9: PVC and many plastic surfaces Primer 10: Concrete, brick and most porous substances Primer 11: Metals and most non-porous substrates Primer 13: Concrete surfaces subject to water immersion, fibreglass For other surfaces, or where any doubt exists, test first or contact Parchem Technical Services for advise. November 2011


Technical Dayta Sheet Compedium
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