DeVilbiss FLG4 vs DeVilbiss FLG5: Which Spray Gun to Choose?

Key Takeaways

• The Devilbiss FLG5 is the better choice for basecoat and clearcoat because it delivers finer atomization and a more consistent fan pattern.
• The Devilbiss FLG4 is better suited for primers and sealers, and for occasional use where finish quality is not critical.

If you are comparing Devilbiss FLG4 vs FLG5, the decision comes down to finish quality versus simplicity. The FLG5 gives you more control and a cleaner result with less effort. The FLG4 works reliably, but it requires more skill and often more correction work to achieve similar results.

DeVilbiss FLG4 vs DeVilbiss FLG5

Most users looking at these two spray guns are trying to solve a specific problem: getting a smoother finish without overspending, or avoiding the frustration of uneven spray patterns and wasted material.

On paper, the FLG4 and FLG5 seem close. In practice, they behave differently. The differences show up in how evenly they lay paint, how forgiving they are during application, and how much post-work is needed after spraying.

Devilbiss FLG4 – Quick Overview

Devilbiss FLG5 – Quick Overview

Devilbiss FLG4 vs FLG5 – Comparison

Feature	Devilbiss FLG4	Devilbiss FLG5
Spray Pattern Quality	Decent but inconsistent	More uniform and controlled
Atomization	Basic	Finer, more efficient
Ease of Use	Very simple	Slightly more refined controls
Finish Quality	Good for topcoats	Better for base and clear
Air Consumption	Moderate	Slightly more optimized
Material Efficiency	Can waste more paint	More efficient transfer
Build Quality	Solid, basic	Improved internal design
Learning Curve	Very beginner-friendly	Still easy, but more precise
Versatility	Good for primers and general use	Better across all coatings
Overspray Control	Less controlled	Noticeably improved
Maintenance	Easy	Easy
Price	Lower	Slightly higher

How they feel in use

The FLG4 feels simple and predictable at first, which is why many beginners start with it. However, once you begin spraying larger panels or visible surfaces, its limitations become clear. The fan pattern can vary slightly across passes, and this often leads to uneven coverage. To compensate, users tend to apply more material, which increases the risk of runs and wasted paint.

The FLG5 feels more stable during actual spraying. The trigger response is smoother, and the fan stays consistent across the full width. This makes it easier to maintain an even overlap between passes. As a result, you spend less time correcting mistakes like dry spots or uneven metallic distribution.

In real use, the FLG5 reduces both material waste and post-finishing work. The FLG4 can still produce acceptable results, but it demands more attention and technique.

Devilbiss FLG4 Technical Details

• Gun Type: Gravity feed spray gun
• Nozzle Sizes: Typically 1.3mm to 1.8mm options
• Air Consumption: Around 9–12 CFM
• Recommended Pressure: 25–35 PSI
• Cup Capacity: ~600 ml
• Spray Pattern Control: Manual fan adjustment
• Material Compatibility: Primer, sealer, basecoat (limited), clearcoat (basic)
• Body Material: Aluminum
• Weight: Moderate
• Cleaning: Manual disassembly required

Devilbiss FLG5 Technical Details

• Gun Type: Gravity feed spray gun
• Nozzle Sizes: Typically 1.2mm to 1.8mm options
• Air Consumption: Around 9–11 CFM
• Recommended Pressure: 23–30 PSI
• Cup Capacity: ~600 ml
• Spray Pattern Control: Improved fan adjustment
• Material Compatibility: Primer, sealer, basecoat, clearcoat
• Body Material: Aluminum
• Weight: Slightly more balanced feel
• Cleaning: Manual disassembly required

Choosing Between the Two

If your work is focused on primer or sealer, the FLG4 is usually sufficient. These materials are thicker and more forgiving, so minor inconsistencies in atomization do not significantly affect the outcome. In this role, the FLG4 is cost-effective and reliable.

For basecoat, the FLG5 is clearly the better option. It lays color more evenly, which is especially important for metallics and pearls. With the FLG4, uneven distribution can lead to visible striping or patchiness, which often requires sanding and respraying.

Clearcoat is where the gap becomes most obvious. The FLG5 produces a more even wet layer, which helps reduce orange peel and minimizes polishing work later. The FLG4 can apply clearcoat, but it tends to require more correction afterward, both in leveling and finishing.

If you want one gun to handle everything, the FLG5 is the more practical choice. It performs well across all stages, while the FLG4 is better treated as a dedicated utility gun for non-finish work.

Final Words

The Devilbiss FLG4 vs FLG5 comparison is ultimately about expectations and use cases.

The FLG4 is a simple, dependable tool for basic applications. It works best when finish quality is not the priority.

The FLG5 offers a noticeable step up in control and consistency. It reduces common problems like uneven coverage and excessive overspray, making it the better option for anyone who cares about the final appearance.

If your work includes visible surfaces or regular painting jobs, the FLG5 is the more reliable long-term choice.

FAQ

Is the Devilbiss FLG5 worth upgrading from the FLG4?
Yes. The improvement in atomization and spray consistency makes a clear difference, especially for basecoat and clearcoat.

Can the FLG4 spray clearcoat effectively?
It can, but results are less consistent. Expect more polishing and correction compared to the FLG5.

Which spray gun is better for beginners?
The FLG4 is simpler to start with, but the FLG5 helps beginners achieve better results with less trial and error.

What size tip should I use for basecoat?
A 1.2mm to 1.4mm tip is typically ideal, especially with the FLG5, for smoother application.

Is there a big difference in air requirements between FLG4 and FLG5?
No major difference, but the FLG5 uses air slightly more efficiently, which helps with control.

Which one is better for primer surfacer?
The FLG4 is well-suited for primer surfacer. The FLG5 can handle it, but its strengths are better used for finishing layers.