Due to weather condition and the proper application of undercoating, Twisted Wrench does not recommend undercoating after the second full week of December. Due to demand, we will continue to undercoat through the winter but cannot guarantee quality application or that it will last the estimated 12 months. This is due to the level of moisture during the winter months. We may suggest rescheduling if the day of your appointment ends up being snowy and/or wet. 


Undercoating prices:

Coupe, Sedan, Small SUV: $172.88

Large SUV without frame: $196.98

Small trucks under 1/2 ton: $225.97

Large trucks, 1/2 ton and over: $252.94

*Extra large vehicles may be subjected to extra labor charge on top of these prices

* Extra time may be required to remove and reinstall plastic shields

** all prices are before tax

Undercoating your vehicle is something that Twisted Wrench recommends to prevent excessive rust on your vehicle’s underbody. In the video above Jenna, our social media manager, explains what an undercoating is, what product we use, how its applied and why we recommend it. This video was the first installment of our Twisted Tips series. Follow our Facebook or our youtube channel, Twisted Wrench, to stay up to date with this series!

If you would rather read about undercoating, we have included a typed out version of the video below:


Here at Twisted Wrench we use a product called fluid film. Fluid film is a non-toxic, not hazardous product that is manufactured using an all natural lanolin base. Fluid film protects all known metals by creating a non-drying barrier that seals out moisture and air. with the fluid film barrier in place existing rust will be stopped on contact and new rust and corrosion cannot develop.



Fluid film undercoating penetrates to the base metal providing a lasting protective barrier from the corrosive affects of salt brine. The destructive force of corrosion is the single greatest threat to your vehicle. consistent exposure to a wide range of elements can lead to a rapid deterioration of metal not only resulting in poor appearance and loss of value but hazardous safety issues as well.


As you can see in our video our technician Jason is applying the undercoating using a standard auto undercoating sprayer. This allows the fluid film undercoating to migrate to inaccessible areas providing up to a full year of solid protection. Fluid film is not water-soluble resisting splash off of water, slush and mud while driving. Because it is a soft coating, it is going to have to be done every year. At Twisted Wrench, we recommend getting undercoating applied in the fall so it will last you through the full winter season when salt is being used on our roads.

You may be wondering why we recommend having your car undercoated every year with fluid film versus a traditional hard shell undercoating. Hard undercoating’s are generally 3 to 4 times the cost of a fluid film application, not to mention there are some downsides. With time hard undercoating’s tend to chip and crack. the protection is then lost as moisture and road salts enter these openings and get trapped between the hard shell and the vehicle undercarriage. corrosion thrives in this environment and you won’t be able to see it until it’s too late because it’s hidden under the hard shell.

In the series of photos above, you will see a vehicle that has been deemed unsafe by us at Twisted Wrench due to the rust on the underbody. Your vehicle has various parts on the underbody that can be weakened by excessive rust that would make your car less safe during an impact. Undercoating will help prevent this and prolong the life of your vehicle.




60 Ethan Allen Drive
South Burlington, VT 05403