Stoner Car Care 91228 PS1 Pre-Soak Cleaner Super Concentrated Detergent 55-Gallon is a super concentrated detergent that quickly loosens and removes tough dirt, grease, bugs, brake dust, and other build-up. This yellow, foaming lemon formula is ideal for self serve, rollover, and conveyor washes. Safe for clear coat finishes. PS1 can also be used as an engine cleaner in high or low pressure applications. PS1 produces thin, cascading sheets of visually appealing suds and leaves a pleasant lemon scent throughout the wash bay. PS1 rinses freely and completely to help prevent streaking. Super concentrated for economy and cost effectiveness. Hard water tolerant. Contains no phosphates, caustics, acids or petroleum solvents. Contains no silicone wetting agents. Safe for clear coat finishes when used as directed. Stoner PS1 Pre-Soak Cleaner is concentrated for dilution with water only. When used directly from the container, start by diluting at 1:200 (PS1:water). To pre-dilute, mix 1 part concentrate with 3 parts water and then further dilute at 1:50. Test mixture and adjust dilution, if necessary, for desired appearance and cleaning strength. Apply to either a dry or wet vehicle. When applied through a prep gun, low pressure sprayer or manual applicator, follow with a wash cycle.