WD-40 Specialist Machine & Engine Degreaser Foaming Spray 18 oz 4-Pack — Long‑Reach Foam, Low‑Residue

WD-40 Specialist Machine & Engine Degreaser Foaming Spray is a low-residue, water-based foaming aerosol that blasts away grease, oil, dirt and grime from engines and machinery with sprays up to five feet.

If you maintain vehicles, farm equipment, or industrial machinery, getting into tight crevices and removing heavy soils without disassembly is a constant challenge. This foaming degreaser combines long-distance spray power with a clinging foam that penetrates and lifts contaminants, leaving surfaces cleaner while minimizing residue. The formula is 50-state VOC compliant and NSF C1 registered for incidental food contact in non-processing areas, making it suitable for a wide range of professional and home shop uses.

How effective is it at removing stubborn grease and grime?

The foaming action helps break up and suspend oils, grime and adhesives so they can be rinsed or wiped away without lengthy scrubbing. Independent ASTM testing shows this product performs ahead of leading competitors for heavy-duty cleaning.

• Foam clings to vertical and recessed surfaces for deeper penetration
• Water-based, low-residue formula reduces post-cleaning buildup
• Removes oil, tar, adhesives, brake dust and baked-on grime

Can I use it on engines and sensitive machine parts without damage?

When used as directed, the degreaser is formulated for most metal parts and common engine components; avoid prolonged contact on painted surfaces and soft plastics. The product is designed to clean without requiring engine disassembly, but spot-testing unfamiliar materials is recommended to ensure compatibility.

• Safe for many metals when rinsed or wiped after cleaning
• Not intended for prolonged exposure to painted finishes or delicate plastics
• Use the precision straw for targeted cleaning around sensors or seals

What makes the spray nozzle and delivery system useful?

This aerosol offers two delivery modes: a powerful stream that reaches up to five feet for hard-to-reach areas, and a precision straw for focused application. The long-distance spray lets you clean tight engine compartments or tall machinery without contorting or moving components.

• Powerful spray reaches up to 5 feet for overhead or recessed access
• Included precision straw creates a tight stream for detailed work
• Foam formula adheres to surfaces to increase dwell time and cleaning effectiveness

How should I apply and rinse the degreaser for best results?

Apply the foam evenly to contaminated areas and allow a short dwell time for penetration, then agitate with a brush if needed and rinse or wipe away residue. For delicate electronics or exposed electrical connections, protect or mask components and follow manufacturer guidance before rinsing.

• Spray foam onto the dirty surface, use straw for precision spots
• Let product dwell briefly to loosen soils, brush stubborn areas
• Rinse with water or wipe clean; ventilate and dry components thoroughly

Who is this for: WD-40 Specialist Machine & Engine Degreaser Foaming Spray is built for mechanics, fleet managers, farmers, maintenance technicians and DIY enthusiasts who need a reliable, fast-acting cleaner for engines and heavy equipment. If you regularly tackle greasy engines, industrial machinery, or large outdoor equipment and want a product that reaches tight spots, reduces cleanup time and leaves minimal residue, this degreaser is a practical addition to your toolkit.

Ingredients

various