A: Howdy neighbor! The detergents used in Zep Industrial Purple Cleaner & Degreaser Concentrate are biodegradable, but the complete product formula is not classified as an eco-friendly or fully biodegradable standalone cleaner. While the synthetic soap elements (surfactants) break down naturally, the formula contains heavy-duty industrial chemicals like sodium hydroxide and butoxyethanol that make it highly alkaline (pH 13 to 14). Consequently, product runoff should always be contained and disposed of properly rather than washed directly into storm drains, soil, or waterways.

A: Yes, Zep Industrial Purple Cleaner & Degreaser Concentrate can be used with a pressure washer, but it must be applied through a downstream chemical injector or a pump sprayer first. Because this formula has an extremely high pH level (13 to 14) and contains sodium hydroxide, running it directly through the internal water pump of your pressure washer will corrode the pump's internal seals and brass components.

A: Hello, thank you for your question. Per the vendor, "Avoid use on metals, such as aluminum, brass, chrome, copper and other alkaline sensitive materials as damage may occur."

A: Yes, Zep Commercial 128 oz. Industrial Purple Cleaner & Degreaser Concentrate contains powerful solvents. The "Purple" degreaser formula is explicitly described as a potent, solvent-based cleaner designed to tackle heavy-duty grease, oil, and tar.

A: Hello, thank you for your question. Per the vendor, "Zep Industrial Purple Degreaser is a concentrated high alkaline degreaser. Use to clean and remove heavy dirt, grease and oil build-up from machinery, engine parts, construction equipment, fiberglass, unfinished concrete, masonry, and asphalt." It can help loosen and lift some oil and grease, but very old or deeply set oil stains may not come out completely with a single application.

A: Hello, thank you for your question. While it is approved for use on unfinished concrete, masonry and asphalt, you should avoid using it on a freshly paved driveway. Fresh asphalt is still curing and can be damaged, stained, or dried out by strong chemicals like this.

A: Hello, thank you for your question. No, this product would not be recommended for that application.

A: No, it will not.

A: Please review the link below. https://www.tractorsupply.com/tsc/product/zep-commercial-industrial-purple--cleaner-degreaser-concentrate-5-gal?cm_vc=-10011

A: Zep degreaser for use on: Heavy machinery, engine parts, construction equipment, fiberglass, unfinished concrete, masonry and asphalt Not for use on: Painted surfaces, aluminum, brass, chrome, copper, marble, slate, granite, natural stone, wood and other alkaline sensitive surfaces as damage may occur