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GGP December 2014

Sealed Units & Sealants Dow Corning launches ‘high end’ sealants Tremco tech weatherproofs Weru windows 62 December 2014 Dow Corning unveiled two new products at the 2014 Glasstec show: 3363 Insulating Glass Sealant and Transparent Structural Silicone Adhesive (TSSA). Both are said to be ‘highly engineered’ silicone technologies, designed to help architects and manufacturers conserve energy, improve design freedom and extend durability for state-of-theart building facades. New Dow Corning 3363 Insulating Glass Sealant is reportedly a fast-curing, high-modulus silicone sealant that can deliver up to 50% higher bond strength compared to traditional materials. The bond strength of Dow Corning 3363 sealant also helps streamline the production of facades by supporting – under the same application conditions – the use of up to 30% smaller joints in comparison with more conventional, deeper joint designs that take more time to seal. It enables architects to create gas-filled double and triple-glazed panels that meet European standard EN 1279 for sealed unit manufacturing, and that could withstand hurricane-level wind loads subject to appropriate joint dimensioning. By enabling such highly engineered structural applications, this advanced material from Dow Corning allows architects and manufactures to deliver total glazing solutions that sacrifice neither design, safety nor productivity. Dow Corning says that TSSA offers crystal clear bonds for fixed-point glass facades. Combining a sleek finish with enhanced energy conservation performance, this ‘nextgeneration’ material allows designers to specify frameless, durable spider facade systems for insulating glass units. The adhesive protects the integrity and energy efficiency of the window by bonding directly onto the glass units instead of drilling through the glass panels leaving the gas-filled, insulating glass unit untouched. The North-West distributor for a high performance window system has reportedly called on the expertise of Tremco Illbruck to provide a compatible perimeter sealing system that is able to help installations meet the higher levels of the Code for Sustainable Homes. Based in Blackpool, Weru Windows has become the approved dealership responsible for supplying and installing the Austrian-made Internorm windows. The company now covers the region from the West Midlands up to the Scottish Borders. Weru’s management viewed the delivery of Internorm installations as a ‘fresh technical challenge requiring new techniques’. Weru MD, Graham Lindsay, explained: “I have dealt with Tremco over the years for the supply of standard sealing products but I have to admit that when we took on the dealership for Internorm, I was sceptical that anything could come up to the specification. Basically, being on the coast, and used to very windy conditions, I didn’t see how such a simple-to-use, site-applied sealing system could keep out the weather.” Tremco Illbruck’s Alistair Inglis showed Weru the products that make up the manufacturer’s advanced i3 system, that is reportedly being used regularly by housebuilders and their sub-contractors. This is now said to enable them to achieve air leakage rates as low as three cubic metres per hour, per square metre; often in combination with off-site building technologies. The first project Weru tackled was a private house in Knutsford, Cheshire. Compriband 600 was specified as the external weather seal, closing gaps from 3- 30mm. Illbruck FM 230 expanding foam, which is said to offer excellent thermal insulation to counter cold bridging, was then employed as a secondary seal. Graham Lindsay said: “When the technical manager for the area came and demonstrated the products on site it was evident just how good the technology is. The products used are easy to apply and are performing well. Internorm is now in the process of adopting Tremco sealants on a wider basis.”


GGP December 2014
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