Everberg, Belgium -- Italian coating firm Italchimica has waterproofed 13,000 m of concrete at the San Siro stadium in Milan, Italy, with Suprasec 2054, a polyurea spray formulation, Huntsman said in a statement.
Huntsman makes the methylene diphenyl diisocyanate (MDI)-based formulation, and it was applied by Italchimica to protect a network of concrete corridors that run throughout the stadium.
The passageways are subject to significant wear and tear from football fans and concert-goers. San Siro - also known as Stadio Giuseppe Meazza - is home to two football clubs, Associazione Calcio (AC) Milan and Football Club Internazionale Milano. At full capacity the stadium can hold up to 80,000 people.
Huntsman said that before application Italchimica tested the polyurea on an area of concrete in the spectator stands.
After approval, Italchimica prepared the corridors for spraying, using a grout based on an epoxy resin to repair damage caused to the concrete over time. Once any holes and cracks had been filled, the polyurea was sprayed and an aliphatic varnish was applied to provide extra longevity.
Huntsman said that Italchimica expects the system to last for eight to ten years. Huntsman added that it's polyurea formulation was chosen because it can be walked on quickly after application and because it looks good.