How much does rust proofing cost in Port Huron?

Full underbody protection is priced by vehicle size — one price for small vehicles, one for mid-size and full-size — and the current prices are on this page. Descaling is by the hour, the wash and frame flush and the annual touch-up are flat prices. Commercial vehicles and trailers are quoted per unit.

How long does rust proofing take?

About an hour for most vehicles, start to finish. Larger trucks and vans run a little longer. You can wait, or drop the keys in the box.

Do I need an appointment?

Yes — everything is by appointment, seven days a week, 9 AM to 10 PM. Send a quote request or call (810) 357-3023 and we set a time.

Is FLUID FILM® rust proofing safe on a new vehicle?

Yes. It is the best time to do it — before the first winter, while there is nothing to treat. It does not affect any factory coating and it does not void a warranty.

Does rust proofing work on a vehicle that already has rust?

Yes. FLUID FILM® goes straight over surface rust and stops it spreading. Heavy scale is knocked off first — descaling, by the hour — and if the frame is badly gone, send a photo through the quote form and we will tell you honestly whether it is worth doing.

How often does it need to be redone?

Once a year, in the autumn. The film works all winter and is renewed before the next one; the annual touch-up is a flat price for a vehicle we have already done.

Rust proofing · Port Huron, MI

Rust proofing in Port Huron, done in about an hour

Rust proofing is what the job does; undercoating is where it goes. At Underline Undercoating it is the same hour of work: FLUID FILM® sprayed into the frame rails, the rocker panels, the cavities and behind the panels — the places road salt actually sits — on any vehicle, whoever sold it to you and however old it is. The prices are by vehicle size and they are on this page.

The shop is at 2498 Lapeer Rd, Port Huron, MI, 48060 — one bay, one address. 7 days · 9 AM – 10 PM, by appointment only, with a key drop box for drop-off.

Get my number Call (810) 357-3023

most vehicles, start to finish: ~1 hrmost vehicles, start to finish
creeps into seams, never cracks: FLUID FILM®creeps into seams, never cracks
new, used, or already rusting: Any vehiclenew, used, or already rusting
9 AM – 10 PM, by appointment: 7 days9 AM – 10 PM, by appointment

Same hour, two words

People search for rust proofing when they have decided to spend money, and undercoating when they are describing the job. In this bay they are one appointment. Everything below the rocker line gets it, and so does everything inside it: box sections, seams, the backs of panels you cannot see from the floor.

What actually gets covered

The difference between a coating that works and one that does not is where it goes. Plenty of shops spray what shows from underneath. We take the time to get product into the places rust starts:

Frame rails, inside and out, and every crossmember
Rocker panels and the cavities behind them
Behind the taillights, inside the bed panels and tailgate
Suspension mounts, brackets, brake and fuel lines
Doors and the bottoms of the fenders where the salt collects

Priced by size, not by surprise

Full underbody protection has two prices — small vehicles, and mid-size or full-size — and they are advertised on this page, not read out over the phone. A vehicle that already has heavy scale gets descaled first, by the hour; a dirty one gets a wash, degrease and frame flush. You know both numbers before you drop it off, and the annual touch-up the following autumn is a flat price.

Why it is once a year

FLUID FILM® is a lanolin-based film that never fully hardens. That is the point: it keeps creeping into seams after it is sprayed, it goes straight over surface rust, and it does not crack and trap water underneath the way a hard coating can. It also washes back over a winter, so it is renewed every autumn before the salt goes down. Most of our customers come back every year.

Wherever you bought it

You do not need to have bought the vehicle anywhere in particular. Private-party purchases, work trucks on their third owner, a new one from any dealer in the county — the underside is the underside. Bring it in, and if you want to see what was done, ask: photos on the rack are part of the job.

Questions

Questions people ask

How much does rust proofing cost in Port Huron?: Full underbody protection is priced by vehicle size — one price for small vehicles, one for mid-size and full-size — and the current prices are on this page. Descaling is by the hour, the wash and frame flush and the annual touch-up are flat prices. Commercial vehicles and trailers are quoted per unit.
How long does rust proofing take?: About an hour for most vehicles, start to finish. Larger trucks and vans run a little longer. You can wait, or drop the keys in the box.
Do I need an appointment?: Yes — everything is by appointment, seven days a week, 9 AM to 10 PM. Send a quote request or call (810) 357-3023 and we set a time.
Is FLUID FILM® rust proofing safe on a new vehicle?: Yes. It is the best time to do it — before the first winter, while there is nothing to treat. It does not affect any factory coating and it does not void a warranty.
Does rust proofing work on a vehicle that already has rust?: Yes. FLUID FILM® goes straight over surface rust and stops it spreading. Heavy scale is knocked off first — descaling, by the hour — and if the frame is badly gone, send a photo through the quote form and we will tell you honestly whether it is worth doing.
How often does it need to be redone?: Once a year, in the autumn. The film works all winter and is renewed before the next one; the annual touch-up is a flat price for a vehicle we have already done.

Still not sure it is worth doing on yours?

Ask Rick →

Stop it before it starts.

Tell us the vehicle and when you could drop it — most jobs are done the same day.

Get a quote or call (810) 357-3023