Question 1

What is vehicle undercoating?

Accepted Answer

Undercoating is a protective coating applied to the underside of a vehicle — the frame, undercarriage, and related components — to add a barrier against moisture, road salt, and debris that contribute to corrosion.

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Question 2

Does undercoating stop rust?

Accepted Answer

Undercoating doesn't make a vehicle immune to rust. It's a preventive layer that helps shield metal surfaces from the moisture and road salt that cause corrosion over time. It works best as part of a broader approach that includes regular vehicle care and inspection.

Question 3

How long does undercoating last?

Accepted Answer

How long coverage holds up depends on the product used, how the vehicle is driven, and the conditions it's exposed to. Vehicles driven year-round on salted roads will typically see coverage wear faster than vehicles with lighter winter use. We can talk through what to expect for your specific vehicle.

Question 4

How often should a vehicle be treated?

Accepted Answer

This varies by product and by how the vehicle is used. Some owners choose an annual reapplication, especially for vehicles driven daily in salt-belt winters. Ask us for a recommendation based on your vehicle and driving habits.

Question 5

Should a new truck be undercoated?

Accepted Answer

Many owners choose to undercoat a new truck before it sees its first winter, since it's easier to apply protective coverage to clean, corrosion-free metal than to treat a vehicle after rust has already started.

Question 6

Can an older vehicle be undercoated?

Accepted Answer

Yes, in most cases. We inspect the vehicle first to assess its condition. If there's already significant rust or structural damage, we'll be upfront with you about what undercoating can and can't do for that vehicle.

Question 7

What if my vehicle already has surface rust?

Accepted Answer

Light surface rust doesn't automatically rule out undercoating, but we'll inspect the affected areas first and give you an honest assessment. Undercoating is a preventive measure, not a rust repair service — if there's structural rust damage, that needs to be addressed separately.

Question 8

Do you undercoat trucks?

Accepted Answer

Yes — pickup trucks, from half-ton to heavy-duty, are one of our primary service categories. See our Truck Undercoating page for details.

Question 9

Do you undercoat Jeeps?

Accepted Answer

Yes. Jeep frames have some tight, hard-to-reach areas around skid plates and rock rails, which we pay particular attention to. See our Jeep Undercoating page for details.

Question 10

Do you undercoat SUVs?

Accepted Answer

Yes, including both body-on-frame and unibody SUVs. See our SUV Undercoating page for details.

Question 11

How long does the service take?

Accepted Answer

Service time depends on the vehicle's size, condition, and the scope of coverage requested. We'll give you a time estimate when we review your vehicle details or during an in-person inspection.

Question 12

Do I need to prepare my vehicle?

Accepted Answer

We handle cleaning and preparation of the undercarriage as part of the service. If you have specific areas of concern (recent repair work, existing corrosion, aftermarket parts), let us know ahead of time so we can plan for them.

Question 13

What areas of the vehicle are treated?

Accepted Answer

Typically the frame, undercarriage, wheel wells, and areas around suspension components, with masking used to protect brake components, exhaust, and other sensitive parts. The exact scope depends on the service and vehicle — we'll walk you through it.

Question 14

Can you apply undercoating over existing coatings?

Accepted Answer

It depends on the type and condition of the existing coating. We'll inspect your vehicle and let you know whether it needs to be removed, cleaned, or can be coated over.

Question 15

Do you offer anything for rodents getting into a stored vehicle or RV?

Accepted Answer

Yes — we offer a rodent-deterrent add-on available with any undercoating service. A scent-based additive is mixed into the coating applied to frame cavities and wiring areas, which helps discourage rodents from nesting in vehicles that sit for extended periods, such as stored RVs or seasonal vehicles. It's a deterrent, not a guarantee against rodent activity.

Question 16

How much does undercoating cost?

Accepted Answer

Starting prices range from $394 for a compact car up to $925 for larger RVs, depending on vehicle size and whether you choose NHOU Oil or NHOU V3 coating. See our full price list on the Services page — final pricing is confirmed based on your vehicle's condition and accessibility.

Question 17

What's the difference between NHOU Oil and NHOU V3?

Accepted Answer

NHOU Oil is a mineral-oil-based coating engineered to creep into seams and hard-to-reach areas of the frame. NHOU V3 is NHOU's hybrid formula, combining lanolin, wax, and oil in one coating for added durability. We can help you decide which fits your vehicle and budget.

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