The main criterion for the multi-million rand press shop project at Volkswagen South Africa’s (VWSA) Uitenhage plant in the Eastern Cape was that it should comply with VWSA’s green initiative and therefore has been designed as the company’s most environmentally friendly building yet. This green initiative led the engineering consultants, BKS Durban, to specify products from Sika’s VOC-free Sikalastic range for coating the vast floor areas.
Once basic construction was complete, the new press shop consisted of an 8 429m2 main production hall and a 6,5m deep pit for housing the press machine. At this stage of the project, Rodcol Contractors were appointed to begin application of the specified Sika products.
The first phase of the project was the press pit floor, where initial preparation was followed by waterproofing and coating with Sika products. The new concrete substrate was sandblasted, followed by a single application of Sikalastic-811 HLT, a unique 100% VOC-free penetrant that produces a permanent hydrostatic barrier.
Supplied in a colloidal liquid base, this high-performance product is totally absorbed by concrete, penetrating up to 200mm, and can withstand a maximum of 35m of hydrostatic pressure.
Once waterproofed, the press pit was coated with Sikalastic-EP Primer II, a two-part, low-viscosity, epoxy-polyamine resin that acts as an adhesion promoter for Sika’s pure polyurea systems.
As a protective, waterproofing top coating with the highest abrasion resistance, Sikalastic-841 ST was machine-sprayed to cover the press pit floor.
The second phase of the project involved coating the floor of the main production hall, including the end-of-line bolster area. A diamond grinder was used to prepare the concrete substrate, which was subsequently coated with Sikalastic-EP Primer II.
This was followed with a spray-applied, stippled coat of Sikalastic-841 ST (2mm thick, medium grey), and the demarcation of the floor area was brush-coated with Sikalastic-849 PA (23 x 38 litres), a two-part, 100% solids, fast-curing, aliphatic, aspartic, pure polyurea liquid-applied membrane.
Offering 100% colour stability, good chemical resistance and almost immediate return-to-service time. Sikalastic-849 PA may be brush-, roller- or spray-applied.