McKee's 37 Universal Clay Lubricant makes detailing clay the safest way to remove embedded contaminants from auto paint. Detailing clay works by pulling contaminants out of the paint. McKee's 37 Universal Clay Lubricant provides a slippery barrier between the clay and the paint to prevent scratching. With McKee's 37 Universal Clay Lubricant and Universal Detailing Clay, your vehicle can have mirror-smooth, silky paint.