4x4 Rust Shield

$49.00 AUD
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A spray-on rust protection coating designed to shield chassis, underbody and exposed metal from moisture, salt and corrosion in harsh conditions.

Long-lasting protection
Off-road & marine use
Repels water spots & limescale
Biodegradable
Quantity
30-DAY MONEY BACK GUARANTEE 12-MONTH WARRANTY
4x4 Rust Shield Kit
UPGRADE
4x4 Rust Shield Kit

$82.00 AUD

UPGRADE

Description

Shield your 4x4, trailer, or marine vessel from salt, sand, and mud with Salt Shift Rust Shield. This high-gloss, hydrophobic coating creates a durable, non-stick barrier against corrosion. Perfect for beach driving, coastal living, and off-road adventures. Each bottle is 500ml / 16.9 fl oz.

Features:

- DIY protection 

- Cures & hardens in 2-4 days

- Gloss finish 

- Corrosion protection (last up to 12 months)

- Non-stick & hydrophobic 

- Australian made

Most standard 4x4s typically require around 250–350ml for full coverage (less than one bottle). Applying more than recommended may result in less-than-ideal performance.

Specifications

    Most standard 4x4s typically require around 250–350ml for full coverage (less than one bottle). Applying more than recommended may result in less-than-ideal performance.

    Rust Shield can last anywhere from 6 - 12 months depending on how often you use your car off-road. We suggest checking before each trip to ensure you're protected.

    How to check: Rust Shield leaves a hydrophobic barrier on your vehicles chassis. Once the hydrophobic properties start to fail It's time to reapply.

    Pro Tip: If your Chassis doesn't rinse clean with a quick wash. Your Rust Shield coating may need topping up.

    Avoid storage in sub-zero temperatures.

    If you are a passionate off-roader or beach goer - you may need to reapply Rust Shield several times per year to ensure you stay protected.

How to Use

Step 1: Pressure wash the appointed areas of your vehicle or trailer, best used with Salt Shifts All Purpose Cleaner.

Step 2: Allow to dry free of water residue

Step 3: Spray Salt Shift Rust Shield on

Step 4: Allow 3 hours to tack dry before any normal tarmac driving, then allow 3-4 days to cure and harden before any trail/beach driving, vessel launching or commuting on wet roads. Ensure to check if it has cured to a non-stick touch test prior to going off-road.

WEAR RESPIRATOR AND SAFETY GLASSES WHEN APPLYING.

ENSURE RUST SHIELD HAS FULLY CURED BEFORE GOING OFF ROAD (TOUCH TEST).

DO NOT APPLY TO EXHAUSTS OR ENGINES.

Product Video

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

SEE THE PROTECTION OVER TIME

Protection that holds up over time. See how Rust Shield helps defend treated metal against corrosion as exposure continues.

HARD-CURING, NON-STICK FINISH

Rust Shield isn’t lanolin-based. Its oil-based formula cures and hardens into a clear, high-gloss, non-stick finish that helps prevent salt, sand, dirt and moisture from clinging to protected metal.

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.

INDEPENDENTLY TESTED

Rust Shield has been independently tested by a NATA-accredited laboratory in Australia to validate its corrosion-protection performance.

PROTECTION THAT LASTS

Once fully cured, Rust Shield provides durable corrosion protection for up to 12 months, depending on conditions and use.

Spray it yourself. No hoist, No workshop

The DIY spray-on formula is designed to perform in one thin, even coat. Most standard 4x4s require approximately 300–350 mL.
Tack-dry within 4 hours; suitable for sealed roads the same day.
Cures completely after 3–4 days, ready for the beach or trail.

FREQUENTLY ASKED QUESTIONS

Does Rust Shield contain PFAs?

No. Rust Shield is completely free of PFAs.

What makes Rust Shield water-repellent?

Rust Shield is an oil-based protective formula that coats metal surfaces, helping block moisture and prevent corrosion.

Is Rust Shield lanolin-based?

No. Rust Shield is not lanolin-based.

How Often Should I Reapply Rust Shield?

Application depends on driving habits.

Rust Shield can last anywhere from 6 - 12 months depending on how often you use your car off-road. We suggest checking before each trip to ensure you're protected.

How to check: Rust Shield leaves a hydrophobic barrier on your vehicles chassis. Once the hydrophobic properties start to fail It's time to reapply.

Pro Tip: If your Chassis doesn't rinse clean with a quick wash. Your Rust Shield coating may need topping up.

If you are a passionate off-roader or beach goer - you may need to reapply Rust Shield several times per year to ensure you stay protected.

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

4x4 Rust Shield Bundle

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

4x4 Rust Shield

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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