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Grid Werks Automotive — Palatine, IL

Inner Cavity Wax
Rustproofing Service

Lanolin-based Wool-Wax injected through factory access points into door panels, rockers, frame rails, and cavities your undercoat can’t reach. No drilling — ever.

✓ Wool-Wax Formula ✓ No Drilling — Ever ✓ Factory Access Points Only ✓ Palatine, IL
⚠ Before Your Appointment
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Remove Plows & Accessory Mounts — All plows, accessory mounts, and tools that increase vehicle weight must be removed prior to arrival.
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Pre-Wash Your Vehicle — Please run your vehicle through a car wash with the underbody blast option before drop-off. Vehicles requiring cleaning upon arrival may be subject to an additional cleaning fee.
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Wheel Locks in Cup Holder — If your vehicle has wheel locks, please place them in the cup holder before drop-off to avoid added labor charges from searching for items necessary to complete the service.
2027 Pricing
Compact / Midsize Auto <15ft
e.g. Honda Civic, Toyota Camry
$300
Full Size Sedan >15ft
e.g. Chevy Impala, Dodge Charger
$325
Compact Pickup / Uni-Body Crossover <16ft
e.g. Ford Maverick, Subaru Crosstrek
$385
Uni-Body SUV / Minivan
e.g. Toyota Sienna, Ford Explorer
$410
½ Ton Pickup / Large Van / Full Frame SUV <19ft
e.g. Ford F-150, Chevy Tahoe, 4Runner
$465
Crew Cab ½ Ton & ¾ Ton Pickup >19ft
e.g. Crew Cab F-150, Chevy Silverado 2500
$475
1 Ton Pickup Truck
e.g. Ford F-350, Ram 3500
$495
⚠ Toyota / Lexus — Clip Fee
+$25
Toyota and Lexus vehicles use a higher volume of plastic retainer clips throughout their panels and liners. Removal and reinstallation requires additional care and time, so all Toyota and Lexus vehicles carry a flat $25 clip fee.
Broken or Missing Clips
+$15
If any clips are broken or missing on your vehicle during service, we replace them at a flat $15 fee per vehicle. We’ll let you know before proceeding.
What’s Included
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Frame RailsFull penetration through factory plugs
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UnderbodyExposed cavities and seams
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Rocker PanelsInside and out
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Fenders & Quarter PanelsWheel liners removed for full access
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HoodInner cavity injection
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Tailgate & DoorsAll door cavities
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Wool-Wax ApplicationLanolin-based, self-healing formula
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Penetrating Rust InhibitorReaches deep into seams
Service Process
01
Vehicle Inspection
We walk through the vehicle and document existing rust, condition of panels, and any missing or damaged clips.
02
Factory Access Points
We locate all factory plugs and access holes. We strictly do not drill holes — ever.
03
Disassembly
All four wheels are removed. Plastic wheel liners are pulled to access fenders and quarter panels.
04
Wax Application
Flexible lances and high-pressure injection deliver Wool-Wax into every cavity through factory access points only.
05
Reassembly & Cure
Wheel liners and wheels are reinstalled. Factory plugs resealed. Vehicle ready by end of day.
FAQ
What is Wool-Wax?
Wool-Wax is a lanolin-based rustproofing compound derived from sheep’s wool. It’s self-healing, flexible, and naturally displaces moisture from metal surfaces — making it one of the most effective cavity protection products available.
Do you drill holes?
We strictly do not drill holes. All application is done through factory-installed access points and plugs. Drilling compromises your vehicle’s structure and is completely unnecessary with the right equipment.
Is this safe on a new vehicle?
Yes. Wool-Wax inner cavity service is safe on brand new vehicles and is actually most effective when applied before any rust has a chance to start.
What about heavily used or high-mileage vehicles?
Yes — cavity wax is highly effective on vehicles with any mileage. On heavily used vehicles, it encapsulates existing surface rust and prevents further spread. It’s not just for lightly used or new cars.
My vehicle already has surface rust. Can I still get this done?
Yes. Wool-Wax encapsulates and seals existing surface rust, stopping it from spreading. It’s not a cosmetic fix, but it’s highly effective at halting rust progression inside cavities.
Will it drip or make a mess inside my vehicle?
No. Wool-Wax is applied in controlled amounts and cures in place. It does not drip into your cabin, onto your seats, or through your floors.
How long does the service take?
A full day. Wheels are removed and plastic wheel liners are pulled to access the fenders and quarter panels. Drop off in the morning and pick up by end of day.
How often does it need to be reapplied?
Cavity wax lasts 5 years to a lifetime depending on conditions. We check it every 2 years when you come in for your Woolwax undercoating re-application.
Can I combine this with undercoating?
Yes — and we recommend it. Inner cavity wax protects the inside of panels and cavities while undercoating protects the exposed underbody. Together they give your vehicle complete rust protection.
Note: Toyota and Lexus vehicles require a flat $25 clip fee due to the higher volume of plastic retainer clips used in their panel and liner assembly. If any clips on your vehicle are broken or missing during service, a flat $15 replacement fee applies — we’ll always notify you before proceeding.
Ready to Protect Your Vehicle?
Serving Palatine, IL and surrounding areas. Drop off in the morning, pick up same day.
Book an Appointment View Undercoating
Service Disclaimer & Limitation of Liability

Manufacturer & Factory Defects: Grid Werks Automotive is not liable for any pre-existing manufacturer defects, factory rust-through, factory seam sealer failures, structural deficiencies, or any condition originating from the vehicle’s original manufacture or assembly.

Aftermarket Parts & Accessories: Grid Werks Automotive assumes no responsibility for damage to, or caused by, aftermarket parts, accessories, lift kits, suspension modifications, running boards, mudflaps, trailer hitches, custom exhaust systems, or any other non-OEM components installed on the vehicle. Customers are responsible for disclosing all aftermarket modifications prior to service.

Pre-Existing Conditions: Grid Werks Automotive is not responsible for damage resulting from pre-existing rust, corrosion, rot, deteriorated undercoating, cracked or compromised seam sealer, damaged undercarriage components, or any other conditions present on the vehicle prior to the service date. All services are performed on the vehicle in the condition received.

Corrosion Protection Limitations: Woolwax undercoating and cavity wax services are designed to slow and inhibit corrosion. Results vary based on vehicle age, condition, prior rust damage, road salt exposure, and maintenance frequency. No rust protection product — including lanolin-based formulas — can guarantee complete prevention of corrosion. Grid Werks Automotive makes no warranty, express or implied, regarding corrosion-free results.

Damage Reporting: Any concerns regarding the service performed must be reported to Grid Werks Automotive before the vehicle leaves the property. Grid Werks Automotive cannot accept responsibility for claims reported after the vehicle has been removed from our facility.

Limitation of Liability: In no event shall Grid Werks Automotive’s total liability to any customer exceed the amount paid for the service rendered. Grid Werks Automotive shall not be liable for any indirect, incidental, special, or consequential damages of any kind arising out of or related to the services provided.

By scheduling and receiving services at Grid Werks Automotive, the customer acknowledges and agrees to the terms outlined above. This disclaimer applies to all services offered including but not limited to undercoating, cavity wax, rust treatment, and salt neutralizer wash.