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Parts Guide
Stop Rodents Chewing Through Your Car's Wiring
Here's the Spray That Actually Works -Wurth Rodent Protection Spray
Keeps rodents away from cables, pipes, plastic & rubber parts
As the weather starts cooling down, our furry little mates start looking for somewhere warm to move into — and unfortunately, your engine bay is prime real estate. Modern vehicles are packed with wiring, rubber hoses, insulation, and plastic components, and rodents absolutely love chewing through all of it. We’re seeing more and more damaged wiring looms, sensor faults, and expensive electrical repairs caused by rats and mice moving in under bonnets, into caravans, sheds, and farm equipment.
By the time the mystery electrical faults start showing up, the damage is already done. The Wurth Anti-Rodent Protection Spray is the cheap insurance policy that most people only wish they’d bought before the repair bill landed — and it’s becoming a popular seller for exactly that reason.
What Is It?
Wurth is a German manufacturer — their gear is in trade workshops across the world, and this spray is one of their workshop staples. The Anti-Rodent Protection Spray lays down a sticky, dry film on wiring, cables, hoses, and plastic and rubber components. Rodents find the smell and texture repellent, so they leave your wiring alone. Once it dries, it’s invisible and doesn’t affect how anything works.
Quick note on the “marten” in the name: Martens are a weasel-like animal in Europe, notorious for eating car engine components — it’s a genuine plague over there. Wurth developed this product for that market. We don’t have martens in Australia, but we’ve got rats and mice doing exactly the same job. Same spray, same result. Works a treat.
Who Needs It?
This isn’t just a rural thing. If you’ve got a vehicle — especially one that sits still for a while — you’re more exposed than you probably realise.
Classic Cars & Stored Vehicles
Rodents love a parked vehicle — it’s warm, sheltered, and full of things to chew. If your pride and joy sits in the shed for months at a time, one spray-down before you button it up can save you from a nasty surprise when you fire it up again in spring. Classic wiring is often harder and more expensive to source than modern equivalents — protecting it is just good sense.
Rural & Farm Vehicles and Machinery
If your vehicle or equipment spends time near grain stores, sheds, or paddocks, you’re at higher risk than your suburban mate. Rats follow food sources, and wherever there’s feed, there are rodents. Your ute, tractor, or farm machinery wiring loom is right in the firing line.
Caravan & Camper Owners
Caravan storage sheds are rodent heaven — dark, quiet, undisturbed, and full of soft cable runs behind the walls and under the floor. We’ve seen some properly ugly damage come out of vans that sat in storage for a season. Apply this before you park it up, hit the cable runs and any accessible spaces under the floor, and you’re sorted.
Sheds, Garages & Suburban Parking
Not just a country problem. Urban rats are bolder than ever, and your engine bay is prime real estate when the temperature drops. The spray works on shed wiring and equipment too — internal and external use, wherever rodents can get in and cause damage. If you’ve had a mouse in the house, assume they’ve had a look at the car too.
How to Use It
It’s an aerosol — no tools, no mess.
- Clean the area first. Remove any rodent droppings, debris, and grease. Fresh spray won’t bond properly to contaminated surfaces.
- Spray from 15–20cm. Apply an even coat across wiring, cable runs, rubber hoses, and plastic components.
- Let it dry. It sets to an invisible film.
- Reapply every 1–2 months — or immediately after high-pressure washing, which strips it back.
Focus areas to hit in a vehicle:
- Wiring harness and visible cable runs
- Rubber hoses and plastic intake components
- Around the air filter and intake area
- Inside wheel arches (common entry points)
- Under-dash cable runs if accessible
For caravans: behind cabinetry, under-floor cable runs, and anywhere rodents can get in from underneath.
HS Auto Parts - Professional advice from a team that really care
We had a second very expensive repair on our car after discovering the damage rats had done under the bonnet despite our best efforts, and this product which comes highly recommended arrived much sooner than expected. The one or two queries I had were answered by the seller in a very professional and caring manner and for this I was especially grateful. The product is working and is clearly of good high quality. Many thanks to the seller.
-Genuine Buyers review from HS Auto Parts Superstore
Wurth Rodent spray – Keeps rodents away from cables, pipes, plastic & rubber parts
Key Features
- Wurth quality — German trade standard. Wurth has been in the professional workshop world for decades. This isn't a budget product dressed up in a premium name.
- Protects wiring, cables, rubber, plastic, and pipes. Everything in your engine bay that a rodent finds worth chewing — covered.
- Internal and external use. Engine bay, wheel arches, under-carriage, inside the caravan. Same product, same result.
- Dries invisible. No visible residue, no mess, no effect on surrounding components. Once dry, you won't know it's there — and neither will the rodents.
- Aerosol — no fuss, no tools. Grab the can, spray the wiring, done. Five minutes of work versus hours of fault-tracing a rodent-damaged loom.
FROM THE WORKSHOP
We See This More Often Than We'd Like
“We see this in the workshop more often than we’d like. Someone brings in a car chasing mystery electrical faults — sensors playing up, fuses blowing for no obvious reason — and when you start tracing it, a rat with a taste for wiring insulation has been through the loom. By the time it shows up as a problem, you’re already looking at hours of labour and possibly a new harness. The spray is $57.90. The repair isn’t.”
This is exactly the kind of thing you don’t think about until it’s too late — which is why we stock it. Prevention is always cheaper than the workshop visit.
Got Questions? We've Got Answers.
Wurth recommend reapplying every 1–2 months for active vehicles. For stored vehicles or caravans, apply before storage, and again when you bring it back into use. If the vehicle goes through heavy rain or a proper wash, reapply.
It’s formulated for wiring, cables, rubber, and plastic — the standard materials in an engine bay. As with anything, do a small test area first. Not recommended directly on electrical contact points or mating surfaces.
Yes — rated for internal and external use. Behind cabinetry, along cable runs, under-floor areas — anywhere rodents might be getting in and causing damage.
There’s a noticeable scent during application that fades as it dries. Once set, you won’t notice it inside the cabin. The deterrent effect persists on the treated surfaces even after the scent is no longer detectable to humans.
Yes. The marten reference is just the European naming convention. The spray works by deterring rodents through scent and texture — it’s not species-specific. Rats, mice, whatever you’ve got chewing through your gear, this will discourage them.
Get Yours — Keep the Furry Electricians Out of Your Wiring Loom
In stock now – Ships from Melbourne. Click & collect available if you’re local.
At $57.90, it’s one of the better investments you can make for a vehicle that sits idle — whether that’s a classic in the shed, a caravan between trips, a farm ute near the grain store, or just the daily driver that parks in the wrong place when it gets cold.
19,000+ sales | 99.7% positive feedback | Family business since the 70s
