00 null null WC Urinstein & Kalklöser

00 null null is a prominent brand of toilet cleaning products in Germany. Its history is closely tied to its long-term presence in the European household care market, specializing in heavy-duty calcification and urine scale removal. The brand is recognized for its distinctive triangular logo and its high-efficacy formulas designed for hygiene maintenance.

Today, the brand is owned by S.C. Johnson & Son, a global American manufacturer of household cleaning products and consumer chemicals. While it has its roots in German consumer history, the product is part of a larger international portfolio. Manufacturing typically takes place across various European facilities to serve the regional market, although the parent company is headquartered in the United States.