The Boulevard, an upmarket commercial glass building situated in Woodstock, Cape Town, required a refurbishment to ensure the structure was of sound integrity.

Sealing glass windows
To reseal around the glass windows from concrete to frame, Sikaflex-AT Facade, a high-performance elastic joint sealant, was used. This product is designed specifically for joint sealing of movement and connection joints, porous and non-porous substrates.

Offering excellent workability characteristics as well as low stress to the substrate, it is solvent-free and silicone-free and although primeless adhesion on many substrates is possible with Sikaflex-AT Facade, the extreme weather exposure of this building necessitated the specification of a primer.

The Boulevard was upgraded with a range of Sika technologies.

 

Coating exposed concrete
In addition, the exposed external concrete of the building was laden with cracks and pores, resulting in water forming internal ponds. To address this, Sikalastic-152 was applied as a two-coat system at a 3mm thickness.

Sikalastic-152 is a two-component, fibre-reinforced mortar, with a low elastic modulus, based on cement and modified with special alkali-resistant polymers. It contains fine particle-size selected aggregates and adequate additives for waterproofing and the protection of concrete subgrades.

An earthy finish
The client required an earthy, more natural look for the finish and consequently a final coat was applied including a stipple finish incorporating river sand in the Sikalastic-152 to achieve the desired effect, completing the main waterproofing element of the structure.

Sika
Tel: 031 792 5600
Website: www.sika.co.za
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