WD-40 Specialist Machine & Engine Degreaser Foaming Spray — 18 oz 4-Pack, Water-Based Low-Residue Cleaner

WD-40 Specialist Machine & Engine Degreaser Foaming Spray is a powerful, low-residue aerosol foaming cleaner designed to penetrate crevices and blast away grease, oil, dirt and adhesives from engines and heavy machinery.

This four-pack of 18 oz cans delivers a water-based, foaming formula that clings to vertical surfaces and reaches into tight gaps for a deeper clean without requiring engine disassembly. The product pairs a long-distance spray—capable of reaching about five feet—with a precision straw for targeted application. It’s VOC-compliant nationwide and formulated to leave minimal residue, making post-cleanup rinse and wipe steps quicker and easier.

How does the foaming action improve engine and machine cleaning?

The foam expands on contact, sticking to surfaces so the active ingredients can soak and break down heavy soils rather than just sliding off. That dwell time helps lift grease, tar, and sticky residues out of crevices for a more thorough clean.

• Clinging foam reaches vertical areas and recesses
• Water-based formula reduces oily residue after use
• Designed to loosen adhesives, oil, grease and grime

What surfaces and equipment can I safely use it on?

Use on most metals and common mechanical components when directions are followed. It’s suitable for vehicle engines, farm and construction equipment, industrial machinery, gears, chains, and tools—avoid sensitive painted plastics, rubber, or electrical components unless those parts are protected first.

• Auto, truck and motorcycle engines (when cool)
• Tractors, forklifts and farm equipment exteriors
• Gears, chains, industrial machines and hand tools

How do the spray options (long stream and precision straw) help during cleaning?

The nozzle offers a fast, forceful spray for reaching distant or hard-to-access areas and a narrow straw for focused spot cleaning. Together they let you tackle both broad surface coverage and small crevice detail without switching products.

• Powerful stream sprays up to five feet for remote access
• Precision straw gives controlled application in tight spots
• Switching between modes avoids overspray and conserves product

What should I expect for residue, rinsing and disposal?

The formula is low-residue and designed for easy rinsing or wiping, helping reduce cleanup time and potential build-up. Always follow local disposal rules for aerosol cans and any contaminated rinse water.

• Low-residue finish reduces post-cleaning buildup
• Rinse or wipe surfaces after dwell time as directed
• Dispose of empty aerosol cans per local regulations

Who is this for: This WD-40 Specialist foaming degreaser is aimed at mechanics, fleet technicians, maintenance teams, farmers, and DIYers who need a fast, effective way to remove stubborn grease and grime without disassembling equipment. It suits users who value a product that combines long-reach spraying with precision control, performs well in independent lab comparisons, and meets 50-state VOC requirements. Always test on an inconspicuous area if you’re unsure about material compatibility and follow the label instructions for safe, effective use.

Ingredients

various