Bilt Hamber PHAT-NEUT Rinseless Wash Dilution Ratios & User Guide

PHAT-NEUT is the pH neutral, rinseless wash solution from Bilt Hamber.

ALWAYS SHAKE THE BOTTLE WELL BEFORE USE FOR 10 SECONDS.

THEN MIX / SHAKE THE PRODUCT INTO ANY DILUTION VIGOROUSLY FOR 20 SECONDS. IT'S HIGHLY CONCENTRATED AND MUST BE FULLY DISPERSED.

Quick Reference Table + Dry-On® Guide

Click/Tap each to view and download.

Dilution Ratio CalculatorTo help with mixing, take a look at the DRC (Dilution Ratio Calculator) App available on the Google Play & Apple App Store. We're not affiliated with the developer, however it is a great app.

A. Pre-Wash - Heavy Soiling

Dilution: Use 2-4% (1:50-1:25) in a pump sprayer or trigger. Pressure washer application may be made at Panel Impact Ratio (PIR) to 1-4%.
Application: Apply to dry dirt film and allow a minimum of 5 minutes dwell time.
Note: This product is not high foaming.
Dry-On®: (Optional but best for heavy soiling) For boosted cleaning, allow to fully dry before rinsing.
Rinse: Pressure rinse.

B. Rinseless Wash - Medium Soiling

Optional Pre-Treatment: Spray well mixed 2% (1:50) Phat-Neut® directly onto dry panels to soften, lift, encapsulate grime and add additional lubrication.

Bucket Stage:
1) Fill a bucket with warm tap water.
2) Add 0.4% (1:250) or, for increased lubrication, 0.5% (1:200) Phat-Neut®
3) Mix vigorously for at least 20 seconds to disperse - this is not a high-foam product but needs thorough mixing.
4) Use a microfibre mitt or sponge soaked in solution; apply to one panel at a time.
5) Rinse the applicator well, optionally in a separate bucket for the highest degree of finish. Phat-Neut® releases dirt effortlessly from wash media.

Dry: Dry with a clean microfibre towel; turn frequently. Once saturated, rinse the towel, wring it out and proceed. Have a second, dry, microfibre to hand if needed to buff down to dry. Optionally, a quick detailer (e.g. Auto-QD at 1:10) may be used at this stage.
Tip: Re-wet any dried areas before wiping.

C. Light Duty Hard Surface Cleaning

Dilution: 0.5% (1:200) with distilled water. Shake vigorously to disperse.
Application: Wet surface using a trigger spray or via microfibre towel lightly dampened with product*.
Action: Wipe gently with a plush microfibre towel, turned frequently, in preferably straight lines, absorbing the wetted film. Buff dry with second microfibre towel if necessary.
Tip: If Phat-Neut® dries on the panel, wipe with dampened microfibre towel and dry with second microfibre towel.
Other Uses: Use 10% (1:10) in a pump sprayer or trigger sprayer for wheel cleaning and 4% (1:25) for insect and bird dropping removal. Apply liberally,
engage Dry-On®, and preferably pressure rinse. Use at 1-2% for clay lube and 0.5% for general light duty hard surface cleaning use. (Deionised water for these applications is preferred).

Key Notes & Warnings

  • Caution: *Due to vast differences in OEM and aftermarket finishes, always test, including Dry-On® function, on your finishes first in discrete spots; test before use.
  • If used in direct sunlight, ensure panel temperature does not exceed 50°C.
    Rinse deposits from driveways immediately afterwards if needed to wash away removed dirt.
  • Deionised water reduces mineral spotting when using as a hard surface cleaner.
  • Warm tap water is preferred for rinseless and bucket-based washes.
  • Use dilutions from 0.4% (1:250) to 1% (1:100) immediately, and do not store higher concentrations of Phat-Neut® for more than 2 weeks; shake them well before reuse.

Comparative Performance Testing

  • Test only on real-world dirty vehicles, not synthetic ASTM or TÜV soiling blocks or other dirt simulators.
  • Side-by-Side Demonstration: Apply Phat-Neut® competitor product on the same contaminated panel.