FORMULATED FOR COMPOSITE DECKING Osmo Composite Decking Cleaner is a concentrated, alkaline-based solution made to tackle stubborn dirt, algae, and grime on wood-plastic composites (WPC/BPC) and other durable, waterproof surfaces. From backyard decking and fences to garden furniture, this heavy-duty cleaner restores the look of synthetic materials with minimal effort. Advantages and benefits: Ideal for WPC & BPC: Specifically developed for composite materials used in decking Concentrated Power: Dilute 1:10 to 1:20 depending on the level of soiling Deep-Cleaning Action: Effectively removes built-up dirt, organic residue, and environmental stains Quick Results: Fast-acting formula reduces the need for scrubbing or pressure washing Water soluble and biodegradable