Rust Protection Kit Heavy Duty 4WD Car Vehicle Self Fit COUPLERTEC 4WDHDSFK


Product Code:
Model: 4WD Heavy Duty System Product Code: 4WDHDSFK Description: CouplerTec Electronic Rustproofing - Four Capacitive Couplers The 4WD Heavy Duty system has been specifically designed to protect the Four Wheel Drive...
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Please note: Images are for Illustration purposes only

  • Model: 4WD Heavy Duty System
  • Product Code: 4WDHDSFK
  • Description: CouplerTec Electronic Rustproofing - Four Capacitive Couplers

The 4WD Heavy Duty system has been specifically designed to protect the Four Wheel Drive or SUV vehicle from rust, even when these vehicles are exposed to *FREQUENT use within highly corrosive environments such as; driving on salted roads or beaches. This system may also benefit older 4WD vehicles that are suffering from minor existing rust problems. But remember, as good as this product is, it is not a miracle cure for badly rusted vehicles, as the more rust a vehicle has, the harder it is to stop. (*Weekend use)

How It Works

CouplerTec’s Patented Technology interferes with the electrical charge between Iron and Oxygen so it becomes hard for them to combine to form rust. In other words, it interferes with the metals ability to react with Oxygen.

We achieve this by creating a negative (-) electrostatic surface charge on the metal surface of the vehicle. The (-) Oxygen atom is repelled by the (-) electrostatic surface charge.

Product Features

  • 10 Year Corrosion Warranty (conditions apply)
  • Protects 100% of the vehicles metal surface, inside and out. Any metal component that is insulated from earth is not protected
  • Protects parts that rustproofing sprays and coatings cannot reach.
  • Helps stop paint from oxidizing and keeps the paintwork looking like new.
  • Prevents rust damage caused by stone chips and scratches in the paintwork.
  • Systems are transferable from vehicle to vehicle.
  • Once only low cost investment.
  • Reduces maintenance costs associated with corrosion.
  • Will slow existing corrosion.
  • Helps to retain strong resale value.
  • Environmentally friendly (no need for toxic sprays or coatings)

Customer Reviews

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Fast Dispatch

Once payment has cleared we will post your item as soon as possible. Some items are made to order or require additional time to dispatch.

Combined Shipping

We combine shipping for orders with multiple items to save our customers money on postage.


Most orders will be sent with a tracking number, to confirm if your item has tracking please contact us.

Please note:

Additional postage charges may apply for regional, remote areas and P.O Boxes. Regional and remote areas include all islands (Tasmania, Norfolk, etc), WA, Queensland, NT, SA, NSW, Victoria, ACT and territories. Please contact us if you are unsure about your area

All efforts will be made to send out orders as soon as possible so you receive your item on time. However please be aware that once an item is sent from our warehouse it is out of our control.

If you would like registered post with signature on delivery and insurance please contact us before purchasing the item.

As per Australia Post policy, all EXPRESS postage automatically have ATL (Authority to leave) which means if you’re not home at the time of delivery it will be left on the premise in a location deemed safe by Australia Post. More information about ATL can be found here

Local Pickup: Please allow up to 2 business days for local pickups - We will contact you as soon as your order is ready for pickup

Please ensure your contact number is included and correct. Failure to do so could result in delayed shipping and/or extra delivery charges in the event of a missed delivery.

International Orders

All international orders may be subject to additional postage costs depending on country and location. Local Import Taxes and Duties are the responsibility of the customer. Orders may be held in customs pending payment of Tax or Duties


4WD Industries will accept returns within 30 days

We will reimburse return postage if we are at fault

Returned items need to be unused / unfitted, in original packaging and in new condition as supplied

Electrical items: If the electrical items have been fitted, we are unable to accept the return. As there is a risk of the item being damaged due to an existing fault with the Vehicle

All new items are covered by a minimum of 12 months warranty for the part. Fitment and removal labour costs cannot be refunded or reimbursed if not performed by us. We will look into all warranty claims on a case-by-case basis as sometimes there are special circumstances requiring further action

On some products, our suppliers require technical assistance to be pursued through their own channels. We will try to help you as much as possible but we may have to direct you to the manufacturer. Unfortunately, requiring technical assistance does not constitute a warranty/return claim

Please note: Pictures are for illustration purposes only, actual product may vary slightly.

Vehicle Fitment: All efforts are made to ensure Vehicle Fitment is correct, however please contact us prior to purchasing to ensure it suits your vehicle as some of the information listed is out of our control.

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