The striking “pillowed” glass windows of the Zeitz Museum of Contemporary Art Africa (MOCAA) and the luxurious The Silo Hotel in Cape Town are an iconic feature of the building. Each window protrudes over a metre, is roughly 5,5m tall and contains 56 triangular glass panels.
At the top of the building, innovative glazed circles form the transparent rooftop sculpture garden area’s floor, through which guests can look down into the massive museum. These glazed circles were sealed using Dow Corning 895, a single-component silicone sealant used for structural glazing.

For the windows, both on the glass pillow facade of the hotel as well as the wall of pillowed windows on the rooftop garden, Dow Corning 993 and Dow Corning 813C were selected.

“Dow Corning 993 is a two-component silicone sealant able to resist exceptionally high stress levels caused by wind, thermal dilatation and the constant weight of the glass units,” explains Grant Batty, national manager for silicones, sealants and adhesives at a.b.e. Construction Chemicals.

“In turn, Dow Corning 813C is a one-part, neutral curing, low-modulus silicone sealant particularly suitable for weather seals, expansion and building joints. It offers durable adhesion to porous and non-porous surfaces, resists ozone and ultraviolet (UV) radiation as well as extreme temperatures, and can cope with joint movements of up to 50% of neutral joint width,” he adds.

These structural glazing sealants were supplied by a.b.e. Construction Chemicals, part of the Chryso Southern Africa Group, and installed by Mazor Aluminium, a Dow Corning specialist approved structural silicone applicator and member of the exclusive Dow Corning International Quality Bond programme.

a.b.e. Construction Chemicals
Tel: 011 306 9000
Website: www.abe.co.za

Caption: Visitors to the Zeitz MOCAA building have spectacular views from the museum’s rooftop garden.
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