WIX-FILTRON is a manufacturer of automotive filters known throughout Europe, headquartered in Gostyń. Leaky gutters on one of the factory’s steel roofs were jeopardizing production, as water ingress was expected to cause moisture damage. Due to a building expansion that added two additional halls, the drainage gutters—which were previously located at the edge of the roof—are now situated inside the roof area at the intersection of various metal roof surfaces. To ensure the roof’s long-term watertightness, these approximately 200 running meters of gutters were permanently sealed with the Triflex ProDetail liquid waterproofing system.