Pro Honda No-Toil Filter Cleaner is a concentrated formula designed to mix with water. No solvents are required to clean No-Toil treated air filters. The cleaner breaks down the waterproofing chemicals of the No-Toil filter oil and rim grease, before completely washing the oil, grease, dust and dirt from the filter. The non-toxic, no-fume, no-odor cleaning solution is skin-safe, and can be used to clean filters in a bucket of water or the kitchen sink. It's biodegradable and non-toxic, so go ahead and dump the dirty solution right down the drain! Concentrated formula designed to mix with water. Requires no solvents to clean No-Toil treated air filters. The Pro Honda No Toil air filter cleaner is a powder formula that easily dissolves in water. Will break down the waterproofing of filter oil and remove all the built-up dirt and grime with it.