pH-Neutral Shampoo
Quick answer: A pH-neutral shampoo is a car wash soap that, at use dilution, sits around pH 7 so it cleans without stripping wax, sealants or ceramics and is gentle on trim and sensitive finishes.
What it means
Formulated with mild surfactants and lubricants, a pH-neutral shampoo lifts dirt and road film while minimising chemical attack on last-step protection (LSP). Concentrates may read slightly acidic or alkaline in the bottle, but when diluted as directed they are effectively neutral and safe for regular maintenance washes.
Why it matters
- LSP-safe: preserves waxes, polymer sealants and ceramic toppers for longer.
- Low risk: gentle on fresh paint, delicate trim and PPF top coats when used correctly.
- Good wash feel: high lubrication helps the mitt glide and reduces wash marring.
- Predictable results: consistent behaviour week to week compared with strong TFRs/APCs.
Where you’ll see it
Regular maintenance washes on protected cars, hand-wash bays, and detailer wash systems paired with snow foam pre-wash.
Context
Car Paint Protection; Maintenance
Common mistakes
- Assuming “pH-neutral” means it cannot reduce protection – aggressive surfactants or hot-panel use can still shorten LSP life.
- Using far too strong a dilution – richer mixes can leave residue or mute hydrophobics temporarily.
- Washing a heavily soiled car with shampoo only – skip the pre-wash and you’ll drag grit, causing marring.
- Judging protection solely by day-one beading – surfactant residue can temporarily flatten behaviour until the next rinse.
Written by Danny Argent. Last updated 10/11/2025 16:54