Product category:
Waterproofing, Sealants and Adhesives
News Release from: Sika | Subject: Bonding and sealing solution
Edited by the Buildingtalk Editorial
Team on 01 June 2007
Sika at Royal Observatory
Sika supplied the specialist bonding and sealing solution for a spectacular mirrored glass structure created by EAG at London's Royal Observatory in Greenwich.
Designed to reflect light towards the North Star, the discoid is a key feature of the new Peter Harrison Planetarium, which is being built as part of the GBP15m Time and Space project at the 330-year-old observatory Due to open in May, the planetarium is built in the form of a bronze- clad inclined truncated cone, with the discoid reflecting the sky on the inclined side
This article was originally published on Buildingtalk on 6 Dec 2006 at 8.00am (UK)
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Sika's technical experts worked closely with EAG at the project's early stages to devise the right structural bonding solution for this prestigious project at the home of Greenwich Mean Time.
Sika's Sikasil SG-500 high performance structural silicone adhesive was specified to bond the 12 large individual panes of glass after they were carefully craned into position.
A two-part, neutral curing silicone adhesive specifically developed for structural glazing, Sikasil SG-500 is also ideal for use in bonding of solar modules and other high demanding industrial applications.
Fast- curing, it has unrivalled resistance to UV and weathering, with stability through a wide temperature range of -40 to +150 degrees C.
Further structural integrity and weathersealing to the discoid was provided by Sikasil SG-20.
Widely-used for structural sealant glazing, this high-strength silicone adhesive has excellent adhesion to a wide range of substrates, including glass, metals, plastics and wood.
Installing and bonding the glass panels on a 40 degree incline were the most challenging aspects of the project, as EAG Project Manager Brian Smith explained: 'Sika provided us with technical help on all the structural calculations, including, crucially, the amount of silicone needed to hold the glass.
The structure is quite unique, being constructed from a disc of glass with reflective coating and a coloured interlayer, just like a mirror'.
Sika's fenestration expert Jeff Richards added: 'This exciting project presented some interesting challenges due to its unique glazing requirements.
We are delighted to have supplied a high-performance solution for the Royal Observatory - one of the most important historical and scientific buildings in the world.'.
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