Ultimate 4x4 Wash & Protection Kit

$562.00 USD
Free delivery on $75+ orders.
Price includes duties and taxes.
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A complete 4x4 care system in one kit. Wash away mud and salt in 60 seconds flat, then lock in up to 12 months of rust protection.

Protects against corrosion
A 60-second contactless wash that breaks down mud, salt and grime
Reaches the spots you'd normally have to crawl under the vehicle for
A soft, streak-free finish that won't mark the paint
A protective barrier that keeps salt and moisture out for up to 12 months
Requires pressure washer
Number of Jets
Rust Shield Quantity
30-DAY MONEY BACK GUARANTEE 12-MONTH WARRANTY
The Everything Kit - High Pressure
UPGRADE
The Everything Kit - High Pressure

$877.00 USD

UPGRADE

Description

Everything you need to deep-clean and protect your 4x4, trailer or off-road rig. The Ultimate 4x4 Wash & Protection Kit removes salt, mud, grease and limescale from the exterior, underbody and chassis—then helps protect exposed metal from rust and corrosion.

Use the 4x4 & Caravan Wash, Undercarriage & Chassis Wash and purpose-built cleaning hardware to reach the hard-to-access areas. Once clean and dry, prep the surface with All Purpose Cleaner and apply Rust Shield for a clear, hydrophobic protective barrier that helps keep moisture, salt and grime at bay.

Features:

  • Complete wash, prep and corrosion-protection system for 4x4s, caravans and trailers
  • 60-second contactless wash helps break down thick mud, salt and limescale
  • Deep-cleans the exterior, chassis and underbody
  • Rust Shield forms a durable, non-stick hydrophobic barrier on protected metal surfaces
  • Helps prevent corrosion caused by salt, moisture, beach driving and off-road conditions
  • Safe on ceramics, polishes and wraps
  • Biodegradable, hazard-free wash formulas
  • Includes purpose-built hardware for hard-to-reach underbody areas

Pressure washer required for the Snow Foam Cannon and Underbody Blaster.

Specifications

    Wash system:

    - pH level 9.5

    - Biodegradable and hazard-free wash formulas

    - Safe on ceramics, polishes and wraps

    Hardware:

    - Rated for up to 4000 PSI

    - Compatible with most common pressure washers

    - Interchangeable nozzles

    - Aluminium, stainless-steel and brass components

    Rust Shield:

    - Oil-based protective formula

    - Cures to a tough, hydrophobic, non-stick finish

    - Typical protection duration: 6–12 months, depending on driving conditions and off-road use

    - Check before each trip and reapply when the hydrophobic rinse-off effect starts to fade

Included Items

Wash System:
x1 4x4 & Caravan Wash (1 Litre / 33.8 fl oz.)
x1 Undercarriage & Chassis Wash (1 Litre / 33.8 fl oz.)
x1 Rust Shield (500ml / 16.9 fl oz.)
x1 All Purpose Cleaner (500ml / 16.9 fl oz.)
x1 Underbody Blaster Off-Road or Underbody Blaster
x1 Chassis Flusher
x1 Snow Foam Cannon (High Pressure)
x1 Soft Bristle Brush
x1 Twist Pile Dry Towel
x1 2-in-1 Wash Mitt
x1 Universal Flusher Canister
x1 Flusher Hose
x1 Quick Release Nozzle Kit*
x4 Common pressure washer adaptors*


*Adaptors include: Karcher K, Gerni, Ryobi, Stihl, Ozito, Makita, Husqvarna, Typhoon, Bosch, Mechpro. If you do not see your pressure washer here, please email us.

*Does not suit 12/16V battery operated pressure washers.

How to Use

Step 1: Foam wash the exterior
Mix Salt Shift 4x4 & Caravan Wash with water at a 20:1 ratio in the Snow Foam Cannon. Foam the vehicle, allow it to dwell for 60 seconds, then use the 2-in-1 Wash Mitt for any remaining agitated cleaning. Once done, rinse thoroughly.

Step 2: Clean the chassis
Add 50–100mL (1.7–3.4 oz) of Undercarriage & Chassis Wash to the Universal Flusher Canister. Attach it to the Chassis Flusher, connect to a garden hose, and flush for 30 seconds while moving steadily along the chassis frame.

Step 3: Deep-clean the underbody
Add 50–100mL (1.7–3.4 oz) of Undercarriage & Chassis Wash to the Universal Flusher Canister. Attach it to the Underbody Blaster Off-Road and pressure washer. Spray across the entire undercarriage, allow 60 seconds of dwell time, then rinse with fresh water. Do not let the product dry. Repeat on heavily soiled areas if needed.

Step 4: Prep metal surfaces
Pressure wash the areas to be protected. Apply All Purpose Cleaner and use the brush as needed to remove grease, grime and stains. Rinse thoroughly and dry the vehicle with the Twist Pile Dry Towel.

Step 5: Apply Rust Shield
Spray Rust Shield evenly onto clean, dry metal areas such as the chassis and suspension.

Step 6: Allow Rust Shield to cure
Allow approximately 3 hours for Rust Shield to tack dry before normal dry-road driving. Allow 3–4 days for it to fully cure and harden before trail or beach driving, vessel launching, or driving on wet roads. Confirm it has cured to a non-stick finish before heading off-road.

Warranty

We proudly offer a limited manufacturers warranty on all hardware products, ensuring they are free from defects in materials and workmanship under normal use and maintenance for a period of 12 months. This warranty is extended only to the original purchaser and is non-transferable.

This Warranty Covers:

  • Defects in the materials and workmanship under normal use.
  • Replacement of faulty components or, if necessary, the entire product.

This Warranty Does Not Cover:

  • Damage caused by misuse, improper handling, or neglect.
  • Normal wear and tear including degradation due to exposure to harsh environmental conditions.
  • Incidental or consequential damage arising from the use of the product.
  • Modifications or alterations to the product not authorized by Salt Shift.
  • Damage resulting from improper assembly, disassembly, or failure to follow instructions.

Money-Back Guarantee

We stand behind the performance of every Salt Shift product, but if it’s not right for you, we’ve got you covered with our 30-Day Money Back Guarantee. Simply request a return within 30 days of purchase, and we’ll process a hassle-free refund.

Learn More About Our Guarantee

Shipping & Delivery

Orders ship from our Gold Coast warehouse within 2 business days (or up to 10 during big promos) using a trackable courier, domestically and worldwide. You’ll get a tracking link as soon as your order’s on the move. If your parcel comes back due to a wrong address or no collection, we can resend it for a small additional shipping fee.

Learn More About Shipping & Delivery

WHAT’S INCLUDED:
4x4 & Caravan Wash
4x4 & Caravan Wash
Undercarriage & Chassis Wash
Undercarriage & Chassis Wash
4x4 Rust Shield
4x4 Rust Shield
All Purpose Cleaner
All Purpose Cleaner
Underbody Blaster Off-Road
Underbody Blaster Off-Road
Snow Foam Cannon
Snow Foam Cannon
4x4 Magnetic Chassis Flusher
4x4 Magnetic Chassis Flusher
Universal Flusher Canister
Universal Flusher Canister
Quick Release Nozzle Kit
Quick Release Nozzle Kit
Soft Brush
Soft Brush
Twist Pile Dry Towel
Twist Pile Dry Towel
2-in-1 Wash Mitt
2-in-1 Wash Mitt

Built for the Whole 4x4

From paintwork and wheels to the chassis and suspension, this kit gives your vehicle the complete post-adventure reset. It’s designed to handle the places salt, mud, sand and grime like to hide.

Clean Beyond What You Can See

A proper 4x4 clean goes underneath. The included wash system helps flush and clean hard-to-reach chassis and underbody areas, where corrosive salt and moisture can build up after beach driving, trails and wet-weather adventures.

Breaks Down Salt, Mud & Limescale

Thick foam and targeted underbody cleaning work fast to lift stubborn buildup before it has a chance to cling to surfaces. Less scrubbing, less time cleaning, and a better result after every trip.

Prep for Long-Term Protection

Cleaning is only half the job. Once surfaces are free from grease, grime and water residue, they are ready for a protective coating that helps keep moisture and salt away from exposed metal.

Durable Rust Defence

The protective finish cures into a clear, hydrophobic barrier that helps defend the chassis, suspension and other metal surfaces from corrosion. It dries to a tough, non-stick finish that helps sand and dirt rinse away more easily.

Ready for Harsh Conditions

Whether you drive beaches, tracks, muddy trails or salted roads, this system helps you stay ahead of corrosion. It is built for regular 4xa maintenance.

Less Effort. Better Results.

Purpose-built tools make it easier to foam, flush, wash and protect the areas that matter. Get a deeper clean and lasting protection with a simple, repeatable process.

Protection You Can Check

The hydrophobic finish helps water rinse away from protected surfaces. Check it before your next trip; when that water-repelling effect begins to fade, it’s time to refresh the protection.

A hand holds a bottle of Rust Shield by Fast Shift rust inhibitor spray in the foreground, while a man in a white lab coat works in the background inside a testing facility.

Tested Corrosion Protection

The corrosion-protection performance of the protective coating has been independently tested by a NATA-accredited laboratory in Australia.

FREQUENTLY ASKED QUESTIONS

Will this kit allow me to clean and protect the underbody of my car?

Yes. The Underbody Blaster and Chassis Flusher clean hard-to-reach underbody areas, and Rust Shield then protects that same metal from corrosion for up to 12 months.

When should I apply the protective coating?

Apply it only after the target metal surfaces are clean, dry and free of grease or water residue. Use the surface cleaner and brush first where needed.

How long does the protection last?

Protection can last around 6–12 months, depending on driving conditions and how often the vehicle is used off-road or near saltwater. Check the hydrophobic effect before trips and reapply when it begins to fade.

Does the protective coating contain PFAs or lanolin?

No. It is PFAS-free and is not lanolin-based.

Are your products safe to use on all surfaces?

Yes! Our formulas are non-corrosive and safe for gel coat, fiberglass, aluminum, stainless steel, plastics, rubber, and painted surfaces. They effectively remove salt deposits without causing damage.

Will Salt Shift strip wax or protective coatings?

No! Our formulas are pH-balanced and designed to clean effectively without stripping wax, ceramic coatings, or protective sealants.

Is it safe to use on my vehicle?

Yes, the Salt Shift wash is formulated to be safe for all vehicle surfaces, including paint, metal, and plastics. It’s tough on contaminants but gentle on coatings and finishes.

Will Salt Shift wash prevent corrosion?

Yes, regular use helps prevent corrosion by removing salt and contaminants that can damage metal surfaces.
Rider carving on a Jet Tech ski

30-DayMoney Back Guarantee

First-time purchases are covered by our 30-day money-back guarantee, subject to eligibility and return requirements.

We’re confident you’ll love it.

  • 12Month
    warranty
  • 55K+Riders
  • 4.8/5Rider
    reviews

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Customer Reviews

Overall rating: 4.9 / 5 from 204 reviews.

Customer photo review of 4x4 Rust Shield

Hi I've recently washed the underbody with the treatment product. Then applied the rust prevention product. Looking great at the moment. Let's see how it lasts. Thanks Mark

Mark B. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Start by saying, I live in the salt belt, Ohio, USA. Tried a few products over the years. Your Salt Shield goes on flawlessly and my wife's biggest complaint was the odor of the other products. Yours smells less potent and the odor doesn't last as long. Hardly no mess. If it lasts through the winter I will definitely be using your products again. Thank you guys Danny

Danny M. 5/5 Verified

4x4 Rust Shield

Great produce, restore bull bar

Joe D. 5/5 Verified

4x4 Rust Shield

Great product quick delivery and excellent result on a 200 series landcruiser

Paul L. 5/5 Verified

4x4 Rust Shield

Have not had the opportunity to test this product as yet

Harry P. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Great product and easy to apply. Now I’m ready for my beach adventure!

Mat N. 5/5 Verified

4x4 Rust Shield

Good product, performs exactly as it says it does

Leigh M. 5/5 Verified

4x4 Rust Shield

This product is great. My truck is 21 years old. Made my undercarriage look like new. Not too glossy or flat like paint would be. Looks like a factory powdercoat. Doesn't make the mess with overspray like paint does either. Would highly recommend.

David A. 5/5 Verified

4x4 Rust Shield

Great product easy to apply will buy more of your products 👍

Kobus M. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Loved the salt shift process, easy to do and a lot less messy than the last product I used. Infact I even used less than I thought I needed to do my whole Ranger chassis. Even coated the rear half twice due to what I use my vehicle for. Chassis flush so easy to use, the undercarriage wash was also great, although was unsure if supposed to dilute it or apply straight because I had to use was a snow foam bottle due to being only thing I had to apply it, so did use the whole 1ltr bottle between the chassis flush and washing with pressure washer. Only thing i can see thats different, is it hasn't dried as a full gloss finish? Not sure if its just rhe way my chassis is or if I didn't do the wash correctly or if not using the all purpose cleaner was the issue as I didnt feel I needed to use it?

Calum A. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

I live in Wisconsin USA. We get some nasty winter weather here. I was using a lanolin base product that works well but collect a lot of dirt and makes servicing the undercarriage very messy. I decided to give salt chef to try sprayed two cars loved what I saw and ordering a second batch shipping was reasonably fast for how far it was coming. Communication communication was great and the end result very pleased with best regards, Jim.

James G. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield Bundle

I was a little skeptical, at first if this if this stuff really works. When I got my truck down it looked brand new underneath. Lot easier to clean, nothing sticking to it. Very impressive, been telling everyone about it. A must if you own a 4x4. Thanks again for making amazing products.

Glenn D. 5/5 Verified

4x4 Rust Shield Bundle

Customer photo review of 4x4 Rust Shield

Works great on my quads!!

Kassidy T. 4/5 Verified

4x4 Rust Shield

It was empty when I received it.

Stan P. 1/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Extremely easy to apply and looks amazing

Taylor P. 5/5 Verified

4x4 Rust Shield

Easy to apply leaves a great looking finish!!

Michael R. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Rust Shield keeps everything looking brand new! You guys should have a dealer in the United States so we could get the product quicker. It took a month or more to get the Rust Shield on my first order through Amazon. My second order, I went directly through your website and it was slightly faster. Thanks for the great product!!!!!!!!!

Mark B. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Amazing product works and looks great.

Randy L. 5/5 Verified

4x4 Rust Shield

Frame looks like it’s freshly painted. Drove through some flood water downtown during a nor’easter at our beach town. Frame had a cloudy look again. Just sprayed it with a pressure washer, water only. Looked brand new again.

Robert C. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Very happy with this works well on my 4 wheel drive we'll definitely buy this again.

Greg F. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Rust shield really works 💪 I've been to the Cape and back with river crossings on the beaches and the dusty tracks etc and everything under the ute is still clean as I love this stuff

Nev P. 5/5 Verified

4x4 Rust Shield

Seems to work well, we live Oahu close to the beach so we will see how it holds up in the long run.

Gus D. 5/5 Verified

4x4 Rust Shield Bundle

Works as advertised and the multipurpose cleaner is great on wheels

Ryan L. 5/5 Verified

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Customer photo review of 4x4 Rust Shield

Easy to apply and if applied correctly there is no running of the product. Also, it was able to do entire under carriage on my vehicle with one bottle. Looks amazing!

Travis B. 5/5 Verified

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Customer photo review of 4x4 Rust Shield Bundle

Was a little sceptical but exceeded my expectations with very little effort . Highly recommend

Rowan P. 5/5 Verified

4x4 Rust Shield Bundle

Customer video review of 4x4 Rust Shield

Did my f150 and now my new quad

Mark M. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield Bundle

I like the Salt Shift much better than other undercarriage rust treatment as Salt Shift does not turn everything black. The frame and running gear looks new and it coats without changing the natural colors of the other components. Two thumbs up!

Scott A. W. 5/5 Verified

4x4 Rust Shield Bundle

Customer photo review of 4x4 Rust Shield Bundle

I’m 55 this year. Was a detailer before my mechanical apprenticeship in the early 90’s. In that time I can tell you of 3 products I would recommend because they work. A particular black RTV silicone. A particular injector cleaner in a bottle. And rust shield from salt shift. I just did the recommended 12 month reapplication and the results are amazing. I almost felt like it didn’t need the top up. Sensational.

Peter T. 5/5 Verified

4x4 Rust Shield Bundle

Easy to apply. Will get back too you when I’ve done some off road.

Warren B. 5/5 Verified

4x4 Rust Shield

Customer photo review of 4x4 Rust Shield

Just washed the Jeep, once dried I sprayed the under carriage per the instructions. I did get some on the fenders which are powder coated steel and faded they now look new as does the under side. This stuff just works the only downside is it took 3 days to dry and I attribute that to the humidity but it was definitely worth it!

Greg C. 5/5 Verified

4x4 Rust Shield

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