Polyurea is a highly versatile material with uses ranging from waterproofing parking decks and making hospital floors hard-wearing and easy to keep clean. The PDA Europe conference studied a number of these uses on the French coast.
Dirk Uebelhoer, corporate system engineer, Sika Services, explained how one of his company’s systems had been applied to a roof surfaced with oriented strand board to become a waterproof layer.
Uebelhoer explained that the polyurea grade used met the requirements of fire-safety standard ETAG 005. In addition, he said the product was fast curing, allowing top coat application on the same day as the undercoat.
Sika chose a solvent-free epoxy resin primer because it had no odour, stuck very well to the substrate and can be considered a backup layer to the polyurea topcoat.
Additionally, the epoxy was low viscosity and had good penetration into the oriented strand board base layer. Overall, he said the system was quick to apply, and easy to work for detailing.
Another popular use for polyurea is in parking decks. Here, the material’s abrasion resistance and resistance to weathering make it highly competitive, Yiva Edwards, of the Swedish Cement and Concrete Research Institute, told delegates.
A hard, wearing life
Edwards explained how a three-year research process had generated guidelines and an Excel spreadsheet tool to help applicators and specifiers choose the right kind of polyurea to protect parking…