Avoid pouring any chemicals in any of the urinals that are being treated with URIZAP. The surfaces of the urinals can be cleaned with any washroom product but we suggest bio-based and eco-friendly products that do not contain biocides or hazardous chemicals for aquatic life. The best compatibility is to use URIZAP along with our washroom products (launching soon). It works well with SLUDGEZAP which digests organic build-up impacting toilets, sinks, showers and baths.