Carbon Collective Ultimus+ Snow Foam — A stronger alkaline pre-wash formula for winter road grime and heavy contamination. Unlike regular Ultimus, it is not pH-neutral; choose concentration to suit the contamination and surface.

Dilute according to the label and foam cannon instructions. Work in the shade on a cool surface; the manufacturer specifies a 5–10 minute dwell without drying. Rinse thoroughly and follow with contact washing as needed.