Dakota Rustproofing
804 N Weber
Sioux Falls, SD 57103
By Appointment only
Monday-Friday 9AM-5PM
Saturday 10AM-3PM
Sunday CALL

Locally owned and operated!

Schedule Appointment

Auto Dealerships WELCOME!  We can protect large FLEET vehicles also!  Call us TODAY!

We can protect ANY VEHICLE. New, used or antique!
Cars, Trucks, Semis, Farm Equipment, Trailers, and MORE!
Existing rust is OK! We stop it from spreading.
We also rustproof FLEET vehicles.  ANY type.  ANY size.  Call or Email us for fleet pricing!

Our phone number is: (605) 400-1768

The destructive force of corrosion is the single greatest threat to your vehicle. Constant exposure to a wide range of elements such as sun, rain, wind and snow can lead to rapid deterioration of metal, not only resulting in poor appearance and loss of value, but hazardous safety issues as well. Road salt, brine and debris also kick up and cling to vehicle under-bodies, eating away at metal, electrical connections, hydraulic lines and fuel lines!

How does this work ?
Dakota Rustproofing protects all metals by creating a non-drying barrier that seals out moisture and air. With the barrier in place, existing rust will be stopped on contact, and new rust and corrosion cannot develop. Our process penetrates to the base metal, remaining active and migrating to inaccessible areas. WOOLWAX® provides long term protection from the corrosive effects of salts, calcium chloride, moisture and fertilizers.

It generally takes about 60-90 minutes per vehicle to treat.  We clean and treat ALL hidden areas, frame, cab corners, rockers, doorskins etc from the INSIDE using wands, sprayers and applicators.  Can be driven immediately and WILL NOT DRIP.  Waiting area is available or drop off and vehicle pickup is available.  We can handle ANY size vehicle in our shop and we can travel for Fleet vehicles if needed. Contact us for more information.  See PRICING for general pricing.  We now have BLACK available along with our powerful clear product.

Dakota Rustproofing uses a clean simple and safe process to provide long term corrosion protection for any vehicle. There have always been two popular methods of vehicle undercoating. Permanent one-time hard shell (rubberized/epoxy), and annual soft coatings such as WOOLWAX®. The downside of the permanent hard undercoatings is that they will chip and become porous, allowing moisture to get trapped between the coating and the undercarriage. Your vehicle will rust away and you wont know it until it’s too late. WOOLWAX® on the other hand, is an annual maintenance application. It does not dry, but forms a wet film-like barrier that moisture and oxygen cannot penetrate. Without the moisture and oxygen rust cannot occur. WOOLWAX® is self-healing. If it gets scraped or comes into contact with a foreign object, it will simply gel over itself. WOOLWAX® is formulated to be thicker and more resistant to wash-off than any other soft undercoating. A single treatment will generally provide complete protection for 10-12 months. In the enclosed environments (doors, rockers, frame rails, etc.) that are not exposed to the elements, the protection will last indefinitely (years).  Since WOOLWAX® contains no solvents, there is nothing to evaporate. The exposed areas of the undercarriage may need to be treated annually.

What’s the big deal about “solvent free” ?
Our products are solvent free and consist of an all natural lanolin base. Without solvents, it will not dry out or evaporate. When applied inside an enclosed environment, such as inside vehicle doors, inside frame tubes, etc., WOOLWAX® will continue to provide protection for an indefinite period of time (years).  As an example, think about the product called WD## which is over 50% mineral spirits, according to their technical data.  What happens with mineral spirits, alcohol, and similar chemicals when you spill them?  They evaporate. These products work well. They penetrate, do their job, loosen the bolt, or get rid of the squeak, and evaporate very quickly.  WOOLWAX® on the other hand, with no solvents, will penetrate the area, and will not dry out or evaporate. WOOLWAX® will continue to provide an indefinite period of protection and lubrication in that same area.

It’s never “too late” to have your vehicle protected. WOOLWAX® and Dakota Rustproofing, will stop existing rust on contact.  Save costly repairs on brake lines, rocker panels, springs, and rusting frames.

We use an industrial grade lanolin based gel, blended with advanced corrosion inhibitors that prevents corrosion and completely STOPS existing rust.  Will not evaporate, dry, get tacky or gummy.  Anti-corrosive coating, lubricant and penetrant for all metals, automotive paints, plastics and more!  Using high-pressure wands, applicators and brushes we treat all hidden areas of your vehicle.Helps stop and prevent your vehicles from rusting.
* Non-Toxic, solvent free and safe for all automotive finishes.
* Helps prevent rust from forming.
* Helps stop existing rust and corrosion from spreading.
* Will not trap water underneath it
* It is not a sprayed in “liner” coating. It WILL NOT scratch off or trap water.


Protect and seal your frame, pinch-seams and wheel-arches from rust with a self-healing powerful rust-inhibitor.  Since 1943!


Not JUST for winter protection!  Salts and fertilizer residue WILL stick in all those hidden areas on your car or truck ALL YEAR LONG.
Summer rains will re-activate those chemicals and really corrode during the summer months.
Get year-round protection from “Those rust stop guys!”.   Dakota Rustproofing.
We just do one thing and we do it extremely well.

We also travel for large fleet and AG orders too.
Contact us to keep your company vehicles protected from rotting away!
Cash, Checks, and all major credit cards accepted.


Dakota Rustproofing is now proud to carry Woolwax® products to help YOUR vehicles and machinery last longer from corrosion and rust!  Specially formulated for industrial applications and is now available for us to apply on your vehicles!
WoolWax® has quickly become the most trusted name in vehicle undercoating protection. Municipalities, Fire Departments, Undercoaters, and snow and ice removal companies all throughout the northeast have switched to using WoolWax® for their undercoating needs. WoolWax® is a heavy duty industrial grade lanolin/woolgrease formula that provides powerful long term corrosion protection. Because WoolWax® is built thicker, it is more resistant to wash-off than any other product that we have tested. WoolWax® is built to last longer ! Available in clear and black.
Fluid-Film® and Woolwax® are very similar products, with a few differences.
* Both made from woolgrease (lanolin) which is an excellent corrosion inhibitor & Lubricant.
* Both solvent free, safe, non-hazardous, environmentally friendly.
* Woolwax® has a proprietary process to remove the woolgrease smell which some people do not care for.
* Woolwax® is formulated to be more viscous (thicker) than Fluid Film®, thereby being more resistant to road-wash.
* Fluid Film® and Woolwax®  both are great products. Woolwax® is geared more towards the industrial user or professional undercoaters that may want a slightly thicker product to be more resistant to wash-off in states with heavier road slush, and with very little noticeable smell.

FLUID FILM® is manufactured using an intricate heating and blending process, which combines unrefined wool wax with selective polar agents and corrosion inhibitors, creating a unique, lanolin-based formulation that stops existing rust on contact. Penetrating on contact, it creates a fluid, self-healing barrier that is always active and will not chip or crack, protecting vehicle undercoating’s and exposed metals for extended periods of time. Safe for use on all metals, it will stop pitting in chrome, will not harm most paints or plastic, and has exceptional lubricating properties, penetrating to stop squeaks and provide lasting lubricity for all moving parts. Electrically non conductive, FLUID FILM® has a high flash point and a thin, flexible composition, making it a perfect protectant for battery terminals and electrical connections also.
Creeps into all seams and cavaties.  Locking out oxygen and moisture.

YES!  We can treat and protect Heavy Truck frames and trailers!
Even Aluminum to STOP magnesium chloride from corroding them! We specialize in treating NEW frames too!

free counter