How Long Does Fluid Film Last

How Long Does Fluid Film Last? – Factors That Affect Its Longevity

Fluid film has been in the market since the 1940s. And thanks to its powerful lubrication and corrosion protection properties, it continues to be used in many applications and industries. 

But exactly how long does fluid film last? According to the manufacturer, the fluid film will last up to 3 years or 36 months when used for indoor applications. And you don’t need to over-apply. Conversely, the product can last 1 to 2 years without any touch-ups needed for outdoor applications. 

That said, its longevity varies based on climatic conditions, type of metal, and even maintenance. So then, how do you apply the fluid film, and where can you buy it? Keep reading to find out. 

What is Fluid Film?

This is a lanolin-based lubricant for all moving parts, a powerful corrosion protectant for all metals, and a penetrant. It is made from highly refined petroleum oils, processed wool wax, and distinct polar agents. This makes it a non-hazardous product. 

Likewise, this all-purpose product penetrates to lubricate door locks, hood hinges, and seat tracks while also stopping any annoying squeaks. Apart from that, it has many other applications in various industries, such as:

  • Automotive and aviation industry
  • Industrial
  • Agriculture
  • Heavy marine industry
  • Trucking
  • Home maintenance
  • Landscaping

Even better, the fluid film is electrically non-conductive, making it an excellent protectant for electrical connections and battery terminals. The best part is that it comes in many types to choose from, including:

  • Fluid film liquid A 
  • Fluid film liquid NAS 
  • Fluid film AS (Aerosol)
  • Fluid film NAS & AS black 
  • Fluid film liquid AR 
  • Fluid film gel BW & GEL BN
  • Fluid film WRO-EP 

Each fluid film type is designed for different applications. For example, the fluid film liquid A offers lubrication and corrosion protection for all metals. On the other hand, the Gel BW & Gel BN is ideal for equipment exposed to marine, industrial, and agricultural atmospheres.

How Long Does Fluid Film Last?

Generally, fluid film offers lasting lubrication for up to 36 months or 3 years for all indoor applications. However, this is only under normal operating conditions.

It can offer up to 1 to 2 years of solid protection when used in outdoor applications. Only that its overall lifespan varies based on the following factors:

  • Climatic Conditions

The fluid film can hold up under a wide range of temperature conditions. However, when exposed to extremely high temperatures and humidity fluctuations, it can deteriorate faster. In colder climates, it lasts longer because it does not freeze.

  • Type of Application

When used for indoor applications, fluid film lasts longer. This is because it does not attract heavy dirt build-up compared to when used for outdoor applications.

  • Type of Metal

Some metals, such as steel and iron, are more resistant to wear and tear than others, like copper and aluminum. Therefore, fluid film applied on metals like steel is more likely to last longer.

  • Maintenance

Fluid film can last for years with proper maintenance of the equipment in which the product is used. However, for vehicles, you must reapply the product once a year on the undercarriage to extend its lifespan.

Maintenance also involves protecting the fluid from extreme temperatures, moisture, and sunlight. This is because these things can degrade their quality. 

How To Apply Fluid Film?

The mode of applying fluid film depends on the type of product you are using. For example, non-aerosol fluid films can be applied using a brush or roller. You can also use a dry rag to apply the film on metal surfaces like you would with wax or polish.

However, products that come in aerosol cans are applied using the spray can. That said, the most effective and convenient way to apply fluid film aerosol and non-aerosol is using a standard airless paint spraying kit.

Alternatively, you can use a spray gun applicator kit from the fluid film manufacturer. The kit features an adjustable nozzle, gun, 360-degree spray wand, and a quart-size reservoir tank. This system is rated for 175 PSI.

With that said, here are step-by-step instructions on how to apply the fluid film to undercoat your vehicle.

Step 1: Lift up Your Car

Find a flat ground and park your vehicle there. Then, raise it using jack stands and remove all the wheels.

Step 2: Cleaning and Prepping

Start by power washing your vehicle’s undercarriage. Then, spray a degreasing agent on all the surfaces and use a wire brush to remove any stubborn rust and debris.

Step 3: Apply the Fluid Film

Let your vehicle dry completely. Then, shake your fluid film well for enhanced viscosity.

Next, apply the film using a spray gun at 60 to 80 psi on the undercarriage, doors, fenders, panels, and other moving parts. Make sure to spray inside all the frame rails, engine mounts, and brackets. You can also use the airless equipment at a minimum pressure of 2,000 psi.

Step 3: Let it Dry

Leave the film to dry for a few hours. And if you want it to dry to the touch, leave it for at least 24 hours. Then, put the tires back and lower down your vehicle. 

Where To Buy Fluid Film?

You can find fluid film at countless auto parts shops, including AutoZone, John Deere, Granger, and NAPA Auto Parts. The product is also available at Lowe’s, CarQuest, O’Reilly Auto Parts, Advance Auto Parts, Summit Racing Equipment, and Gemplers Farm & Home Supply.

Another place to buy fluid film is at Walmart, Home Hardware, The Rust Store, and Home Depot. For online purchases, you can get the product at Amazon and eBay. 


Before we conclude our guide on how long fluid film lasts, let’s check out some commonly asked questions.

Q: How long does fluid film last in the can or bucket?

The non-aerosol fluid film has an indefinite shelf life. However, in its aerosol form, the product is guaranteed to last one year from the date you buy it. This is because of its propellant nature and nozzle.

Q: How often should you reapply fluid film?

Although fluid film can last between 1 and 3 years, you need to reapply it every 1 or 2 years. However, you don’t need to reapply on the entire car or equipment. Reapplication involves a few touch-ups.

Q: What are the signs that you need to reapply fluid film?

If you notice signs of wear and corrosion on the metal surfaces, it’s a sign you need to reapply the fluid film. Or, if you hear squeaky noises and the metal starts to feel gritty or rough.  


Besides being a lubricant, the fluid film is a protectant and penetrant for all metal types. It offers corrosion protection from industrial and natural atmospheres. And when used for indoor applications under normal conditions, this product provides up to 36 years of lasting lubrication and protection.

However, when it comes to outdoor applications, it can last one year or more based on factors like climatic conditions. The important thing is knowing how to apply the film, especially to your car. With that said, you can buy this product at various auto parts shops in the US. It is also available on Amazon.

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