Is Fluid Film Good Rust Protection?(Solved)

Is Fluid Film Good Rust Protection?

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Is Fluid Film Good Rust Protection?

Fluid Film is a type of protective coating you can apply inside cars. You can also refer to it as liquid plastic.

Different types have different functions, such as corrosion-resistant liquid polyurethane or biodegradable polyester fluid film.

Yes! Fluid Film is a revolutionary product that you can use to protect your vehicle from rust and corrosion. It boasts over 90% corrosion protection against a wide range of metals and is biodegradable. Its unique polymer-based formula forms a tough, flexible, and breathable Film that provides outstanding rust protection for any vehicle.

You can apply Fluid Film mechanically and with a sprayer or roller applicator.

Today, manufacturers have turned to more exotic and sophisticated materials to meet the demands of advanced-performance vehicles.

Metals such as titanium and aluminum are prevalent in today’s cars, and their high strength-to-weight ratios make them ideal for constructing chassis members.

Another threat can rack up substantial maintenance costs: Rust. The corrosive effects of moisture might be something your local garage gets used to, but it’s an entirely different story on a race car.

Some substances, such as ceramics and metal-ceramic coatings, can stop rust. Corrosion is also gradually getting countered by new materials and processes, but the key to protecting a metal’s interior from moisture is still a compelling film.

Fluid Film has unique advantages over other corrosion-protecting films in terms of corrosion protection and price. The formula is made of a polymer and is biodegradable.

It forms a rigid, flexible, breathable film that provides outstanding rust protection for any vehicle.

Fluid Film also has excellent mechanical properties and anti-oxidation solid properties. It resists damage due to impacts and scratches.

Can you apply FLUID FILM over rust?

Yes! If you have rust on your paint, you can apply a layer of Fluid Film to form a protective barrier. After the Fluid Film dries, reapply another coat for optimum protection.

Wash the surface with soap and water to remove dirt and debris before applying Fluid Film.

Use Spray Nine All Purpose Cleaner or equivalent natural cleaner for stubborn dirt and chemicals that don’t respond to soap-and-water cleaning.

If you have a lot of rust and undercoating, use a wire brush or scotch-Brite pad to remove loose corrosion.

You may want to try shooting the surface with a degreaser first since you can use a degreaser to cut through oil-based undercoating, grease, and grime.

After your surface is clean and dry, spray the Fluid Film directly onto the surface. Spread a thin, light coat of Fluid Film all over the surface.

Is Fluid Film Good Rust Protection?

A little bit goes a long way. Don’t saturate the surface. Wipe off excess Fluid with a clean cloth, leaving with a thin, lightly hazy coat of Fluid Film.

This layer should feel tacky, but don’t let it become thick and gooey, as that will inhibit the finish from being able to breathe.

Let the Fluid Film dry for at least 15 minutes before topping it with a quality brand of carnauba wax.

What To Put on Rust To Stop It From Spreading?

AlloyThe volume ratio between iron and carbon is ideal for rust resistance.
Corrosion rates in an atomized environment are lower on alloys than with pure metals.

Alloys are more resistant to hydrogen oxidation than pure metals, but you can scratch them due to the higher surface hardness of the material.
OilOil at high temperatures is not toxic to corrosion.
Oil from water systems can also be used as a spray rust protectant.
GalvanizeGalvanizing will provide excellent protection for steel as it is painted with a layer of zinc thick enough to withstand the pressure of the rusting process.

It is essential to have good contact between paint and metal to be effective.
Ensure all surfaces are clean before painting.
PaintingYou should use paint that boasts a metal-grade design.
It is necessary to paint the metal and test it for rust resistance.

It is also essential to clean the metal immediately after painting to prevent air contaminants from penetrating it.
Powder coatingPowder coating is also a good rust-protective coating for steel.

The powder is stuck to the metal by electrostatic attraction with a thick acrylic resin layer to protect it from atmospheric corrosion.
ElectroplatingElectroplating is a suitable method of applying an antirust coat such as zinc on steel.
You can make it in different thicknesses depending on whether you need to use it indoors or outdoors.

How Do You Cover Rust Undercarriage?

Prime the dry undercarriage with a rust converter before painting it. Start using a wheelbarrow to shift the rust converter around the vehicle, creating a thick slurry layer.

You should cover an entire car in one application if you are diligent about applying additional coats of rust converter until you completely cover the metal.

Rust converters are available in liquid and solid form and come in different colors to find one that matches your vehicle’s color scheme.

Pour a liberal amount of rust converter over the entire undercarriage, including the wheel wells, frame rails, and engine bay.

If you cover a car with rust in more than one section, apply the converter to both sections before painting.

When applying the rust converter, apply the slurry as thickly as possible before letting it dry for 10 minutes.

To cure the slurry and make it into a durable film, you will need to wait at least an hour before painting your entire vehicle. This will ensure that you have a tough, water-resistant, and paintable surface to work with.

If you are planning to use a brush to apply a rust converter, make sure that the bristles come from nylon or stainless steel.

These materials are more abrasive than plastic bristles and will help them to stand up to the corrosive properties of the rust converter.

If you prefer to spray the rust converter onto your vehicle’s undercarriage, use an air compressor with a spray gun or paint roller extension.

Spray the converter onto the vehicle’s existing surface rust, starting at the top and moving your way down.

Does FLUID FILM Soak into Metal?

Yes! Fluid Film will imbed itself in the pores of the metal, which makes its protection so incredible. This also means that Fluid Film won’t just run or wash off but will last for years.

You should apply Fluid Film fresh and free of contaminants; it doesn’t matter what surface you use.

The only downside to Fluid Film is that the protection is a thin coating, so scratches will show through more than on a waxed or painted surface.

This is why you should only use Fluid Film for maintenance, not as full-time paint protection. You should continue to wax or paint your vehicle to get a complete coating.

Fluid Film will last for years. I have customers who have been using Fluid Film for 10+ years, and I still see cars with Fluid Film, looking just as fresh as the first application.

The longer you wait to apply Fluid Film, the more difficult it will be/will become to remove contaminants because they have been absorbed deeper into the metal.

You should plan on applying Fluid Film to vehicles in between waxing/painting as opposed to after.

The application of Fluid Film is relatively easy. Just shake the bottle, then spray and wipe it onto a clean and orderly surface.

Is Fluid Film Good Rust Protection?

I recommend using a microfiber applicator, but don’t use anything else on it or while applying the fluid Film because it will scratch and damage your applicator.

What Is the Best Spray Gun for A Fluid Film?

Devilbiss Finish line Solvent Based Gravity Feed HVLP GunBest Performance
User friendly
Compatible with all different types of paint
Master Pro Series 44 High-Performance HVLP Spray GunProfessional quality
Easy to clean
PNTGreen Professional Gravity Feed Air Spray GunCheap
High transfer efficiency
Good for beginners
REXBETI High Power Electric Spray GunElectric
Good value for the price
Astro Pneumatic Spray GunProfessional grade
Very sturdy stainless-steel design
Easy to clean

How Do You Neutralize Rust Before Painting?

1. Rinse the rusted area in warm soapy water.

2. Apply a rust inhibitor, such as WD-40 or Boeshield T-9, to the rusted area.

3. Cover the sprayed area with plastic wrap for up to 90 minutes before spraying paint onto it.

4. Once ready to paint, apply 2 coats of spray paint and allow each coat to dry (ideally overnight).

5. Remove the plastic wrap to reveal a rust-free area for the paint to adhere to.

6. If you plan to apply multiple layers of spray paint, repeat steps two through five between each layer.

7. After applying your final layer of paint, and once it has dried, apply another coat of spray paint as a sealant.

8. To maintain your newly painted bumpers, avoid driving your vehicle through the rain for 24 hours.

9. Wash the newly painted bumpers with soap and warm water.

10. To dry them, apply a coat of wax or carnauba wax to prevent water spots from forming.

11. Allow the wax to dry, then buff it with a soft, clean cloth.

12. If you apply a car body wax, allow it to dry completely and buff it again before washing your vehicle.

13. After that, you may wash your vehicle as normal.

Wool Wax vs. Fluid Film – Which is better?

FactorWool WaxFluid Film
Cost$25 per gallon$100 per gallon
Usage limit3 gallons per occasion10 gallons per occasion
Time Duration1 month7 years
Recycling OptionRecycling OptionVery easy to recycle
No-ToxicNoYes! With ‘Environmentally Friendly Processing’
No VOCsYou can release VOCs if the object gets burnt in an open flame; not recommended!

Box Measuring Tape example. (A measure of 10 inches is 3 feet)

Different Types of Vehicle Undercoating – Options & Tips

1. Rubberized Underbody Coating

Spray rubberized underbody coating on a surface and then allow drying for a few hours before applying a second application.

This undercoating is only sometimes available to the public, but you can purchase it from specialty stores. The undercoating adheres to the top side of the body and will allow for a smooth road surface.

2. Spray-on Underbody Coating

Another option is to spray on the coating; however, this can quickly add up after a few times. An excellent way to prevent this is only put a light coat of coating on your vehicle.

This will provide more protection than what you are putting on the surface of your car.

3. Wax Based Underbody Coating

These wax-based underbody coatings are the most inexpensive ones you can invest in. However, if your vehicle boasts heavy usage, its limitations will not hold up.

If this is the case, you may need to go with a heavier coating that will last longer and give you better results.

3. Polyurethane Underbody Coating

If you want to store your vehicle for an extended period, this is an excellent way to provide all the protection you need.

You will need to apply this type of coating and allow it to dry for eight hours. The finish of the underbody coating will look glossy and be very smooth.

4. Chassis Sleeves

This method is a little costlier, but it will give you a more durable finish and better results over time.

You can expect this underbody coating to last a couple of years, and it will protect your vehicle from harsh weather conditions.

5. Varnish Underbody Coating

Another option is a varnish underbody coating that you can apply yourself. The varnish coatings are made out of urethane and will give you the best protection over time.

You can put the varnish coating on your vehicle and expect it to last around two years. It will protect your investment, and you do not have to worry about any elements harming it.

6. E-Coat Underbody Coating

The E-coat underbody coating is more expensive than most other types you can use regularly. However, if you want long-lasting results, this is what you should invest in.

Where Should You Not Spray Undercoating?

1. Exhaust

It would help if you did not spray undercoat on your vehicle’s exhaust. This is due to the risk of carbon buildup in the pipe, which can cause a dangerous backup and potentially catch fire.

2. Fuel Pipe

The fuel pipe is prone to leakage, and you should not spray with an undercoat. If there is any leakage, it will run down onto the engine and contaminate other metal parts.

3. The Spare Tire Well

Spraying the spare tire well with an undercoat can weaken the tire’s structure. When filling the tire, it is essential to keep this area away from any material that will stain or discolor the undercoat.

4. Engine

You can use some products on the engine of your vehicle. Any metal parts not coated with an undercoat could get pitted or stained.

5. Suspension Components

The undercoat can corrode brake lines, springs, shock absorbers, and sway bars. You can use a paint system that uses polyurethane or polyurea coating to coat these components.

It is crucial to maintain the undercoating and make sure that any rusting or buildup of particles gets cleaned off regularly.

6. Tires

Tires are rounded objects, subject to the highest pressure of any component on your vehicle. Undercoating can puncture a tire, which could cause an accident.

7. Undercarriage

Undercoating cannot protect the engine from dust and debris from under the vehicle. This leads to an uneven buildup of dirt and dust that can affect paint quality and lead to corrosion.

There is also a risk of electrical shorts in the body panels.


Rust is one of the biggest problems when it comes to cars. It can cause your car to rust and deteriorate, or you can face a hefty repair bill.

Getting protective undercoating is a significant investment. It will protect your car from rusting and any other element that could cause damage to it.

It also helps prevent rust after you wash the car and cleans the dirt off easier when washing it.

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