., PK4 Appearance: Purple Dilution: 1 : 3 water Scent: Neutral Concentrated formula that is dilutable 1 part to 3 parts water and sprayed or mopped directly on high-traffic areas. Let sit for 5 minutes and agitate with carpet brush, if possible, prior to shampooing.Carpet Traffic Lane Pre-Spray/Stain Remover Concentrate, 1 gal.