The short answer is yes, you can apply Fluid Film on a cold day, but optimal application hinges on careful preparation and understanding the product’s behavior at lower temperatures. This article, drawing on decades of experience with Fluid Film application in various climates, provides a comprehensive guide to maximizing its effectiveness even when the mercury dips.
Understanding Fluid Film and Cold Weather
Fluid Film is a lanolin-based rust and corrosion preventative renowned for its penetrating and lubricating properties. Its unique, non-drying formula creates a protective barrier that actively resists moisture, salt, and other corrosive elements. However, like any material, Fluid Film’s viscosity increases as temperatures decrease, potentially affecting its application and overall performance.
The Science Behind Cold Weather Application
The viscosity of Fluid Film, its resistance to flow, is directly influenced by temperature. Lower temperatures cause the lanolin and other oils within the product to thicken. This increased viscosity makes it more difficult to spray and may hinder its ability to penetrate tight crevices and seams, vital for effective rust prevention. Understanding this fundamental principle is crucial for successful cold weather application.
Defining “Cold”: Setting the Temperature Threshold
While there’s no universally agreed-upon temperature threshold, below 40°F (4.4°C) is generally considered “cold” for Fluid Film application. At these temperatures, the product will noticeably thicken, requiring specific adjustments to ensure proper coverage and penetration. Applying Fluid Film in temperatures consistently below freezing (32°F or 0°C) presents additional challenges and requires even greater diligence.
Preparing for Cold Weather Application
Success in applying Fluid Film on cold days hinges on meticulous preparation. Ignoring these steps can lead to uneven coverage, reduced penetration, and ultimately, diminished protection.
Warming the Fluid Film
Warming the Fluid Film prior to application is arguably the most critical step. This lowers the viscosity, making it easier to spray and improving its penetrating ability. Several methods can be employed:
- Water Bath: Submerging the Fluid Film can in warm (not hot) water for 20-30 minutes is a safe and effective method. Be careful not to overheat the can.
- Warm Room: Storing the Fluid Film in a heated garage or room overnight allows it to gradually warm up.
- Heat Gun (Carefully): Using a heat gun on the outside of the can in short bursts, keeping it moving to avoid overheating, can provide rapid warming. Extreme caution is advised to prevent explosions or damage to the can. Never apply direct, sustained heat.
Preparing the Application Area
The surface to be treated also benefits from some preparation.
- Clean the Surface: Remove any loose dirt, debris, or existing rust scale. A clean surface allows Fluid Film to adhere properly.
- Dry the Surface: Moisture hinders Fluid Film’s ability to bond with the metal. Use a clean cloth or compressed air to dry the area thoroughly.
- Warm the Surface (If Possible): Although not always feasible, warming the application area with a heat gun or by parking the vehicle in a sunny spot can improve Fluid Film’s adhesion and penetration.
Choosing the Right Application Method
While aerosol cans are convenient, larger applications often benefit from using a spray gun.
- Aerosol Cans: Ideal for spot treatments and smaller areas. Ensure the can is warm and shake it vigorously before and during application.
- Spray Gun (with proper setup): Allows for more controlled and even application over larger areas. Ensure the spray gun is compatible with Fluid Film and that the nozzle is appropriately sized for the desired spray pattern. Consider using an undercoating gun with a long wand for reaching difficult areas. Important: thin the fluid film with mineral spirits (at a ratio between 5%-10%) before placing it in a spray gun.
- Brush/Roller (limited use): In extremely cold conditions or for targeted applications, a brush or roller can be used, but penetration will be limited.
Application Techniques for Cold Weather
Applying Fluid Film in cold weather requires patience and attention to detail.
Apply Thin, Even Coats
Multiple thin coats are far more effective than a single thick coat. This allows the Fluid Film to penetrate deeply and prevents it from becoming too viscous on the surface.
Focus on Critical Areas
Pay close attention to areas prone to rust, such as seams, joints, wheel wells, and undercarriage components. Use the spray wand to reach inside frame rails and other enclosed spaces.
Monitor the Spray Pattern
Cold Fluid Film may spray unevenly or “sputter.” Regularly check the spray pattern and adjust your technique as needed. Re-warm the product if it becomes too thick.
Frequently Asked Questions (FAQs)
Here are some common questions and answers to help you navigate Fluid Film application in cold weather:
1. Can I apply Fluid Film in freezing temperatures (32°F or 0°C) or below?
Yes, you can, but it requires significantly more effort. Warming the Fluid Film becomes even more critical, and you may need to re-warm it frequently during application. Inspect the coverage closely, as penetration may be limited.
2. Will Fluid Film freeze if applied in cold weather?
No, Fluid Film does not freeze solid like water. However, it will become significantly thicker and more viscous, resembling grease.
3. How long does it take for Fluid Film to dry in cold weather?
Fluid Film doesn’t “dry” in the traditional sense. It remains a wet, oily film. In cold weather, it will take longer to spread and penetrate. It’s best to avoid washing the vehicle or exposing it to heavy rain immediately after application.
4. Can I thin Fluid Film to make it easier to spray in cold weather?
Yes, you can thin Fluid Film with mineral spirits (5%-10% ratio) when using a spray gun. This will reduce its viscosity and improve sprayability. Do not add thinner to aerosol cans.
5. Will cold weather affect the longevity of Fluid Film’s rust protection?
No, cold weather itself won’t negatively impact the longevity of the protection if the application is done correctly. However, improper application due to the cold can reduce its effectiveness.
6. Can I apply Fluid Film over existing rust?
While Fluid Film will help to stop the spread of rust, it’s always best to remove loose rust scale before application for optimal adhesion and penetration.
7. How often should I reapply Fluid Film in cold climates with heavy road salt use?
In areas with heavy road salt, annual reapplication is generally recommended. Consider reapplying more frequently in particularly harsh winters.
8. Is it safe to apply Fluid Film on exhaust components?
No. Fluid Film is not designed for use on exhaust components due to the high heat.
9. Can I apply Fluid Film to rubber or plastic components?
Yes, Fluid Film is generally safe for use on rubber and plastic, but it’s always best to test a small, inconspicuous area first to ensure compatibility.
10. What tools do I need to apply Fluid Film in cold weather?
The essential tools include: warm water bath or other warming method, clean cloths, spray gun (if desired), protective eyewear, gloves, and a well-ventilated work area.
11. Is it dangerous to warm up the Fluid Film can too much?
Yes, overheating the Fluid Film can is extremely dangerous and can lead to an explosion. Never use direct, sustained heat or place the can near an open flame.
12. Where can I buy Fluid Film?
Fluid Film is widely available at auto parts stores, hardware stores, and online retailers.
Conclusion
Applying Fluid Film on a cold day is achievable with proper preparation, the right techniques, and a thorough understanding of the product’s behavior. By following the guidelines outlined in this article, you can ensure that your vehicle receives the rust protection it needs, even in the harshest winter conditions. Remember to prioritize safety, take your time, and pay close attention to detail for optimal results. Don’t let the cold deter you – with a little extra effort, you can conquer rust and corrosion year-round.