Knockout

Knockout® works great removing all types of outdoor stains on stone, brick, and concrete, including sidewalks, driveways, pavers and cinderblock. It is a highly effective cleaner for atmospheric and environmental staining, including tire & skid marks on concrete. It is a non-flammable and non-acid solution. What Surfaces can it be used on? Knockout is recommended for use on exterior surfaces including: Unpainted concrete Unpainted brick Unpainted stone Pavers Sidewalks Concrete walls Don’t use it on these surfaces: Do not use on painted surfaces and anodized aluminum. How to use it: Knockout is easy to use. Can be used with a pump sprayer, bucket & brush or applied directly with spray bottle. Simply apply to affected area, work in lightly, wait a few minutes and rinse off with a garden hose or pressure washer. Larger sizes for this product are available. Please call or email regarding other sizes and shipping options.