Wood is a common material in homes, used for everything from structural beams to doors and furniture. However, it will burn if exposed to fire. According to the U.S. Fire Administration, home structure fires resulted in more than 1,729 fatalities in 2025. In many of these fires, the rapid combustion of wooden structures played a significant role in the spread, contributing to the tragic outcome.
Fire retardant paint is one way to help protect wooden surfaces. It does not make wood fireproof, but it works to slow down the spread of flames and can provide some extra time to evacuate. In this blog, we will inform you about how you can apply fire retardant paint on wood in detail. But before doing that, let’s understand the materials you need to apply the paint.
What Materials Do You Need to Apply Fire Retardant Paint on Wood?
Before you begin, it’s important to gather the right supplies to paint on wood. Not all fire resistant paints are the same. You will need a product specifically labeled as a fire retardant coating for wooden surfaces. Always check that the product meets relevant ASTM (American Society for Testing and Materials) safety standards.
- Protective Gear: Your safety comes first. Wear chemical-resistant gloves, safety glasses, and a mask to protect yourself from fumes and splashes.
- Application Tools: The best application tool depends on your project. A brush works well for detailed trim, a roller for large or flat surfaces like walls, and a spray gun for even coverage on complex areas.
- Surface Preparation Supplies: Have a clean cloth, mild detergent, sandpaper, and a suitable wood filler on hand. A clean, smooth surface is non-negotiable for the coating to work correctly.
Steps to Apply Fire Retardant Paint on Wood
When you want to apply fire retardant coating or paint on wood, follow these steps:
Step 1: Prepare the Wood Surface
Start by cleaning the wooden surface. Use a simple solution of very mild dish soap & warm water to remove all dust, grease, and grime. Wipe the wood surface with a clean, damp cloth, then let it dry completely. Next, inspect for any holes, cracks, or imperfections.
Fill these with a quality wood filler and allow it to dry. Once the filler is dry, you can lightly sand the entire surface. The goal is not to strip the wood bare, but to create a uniform, slightly rough texture that helps the paint adhere.
Step 2: Apply the Primer
A primer creates a stable, uniform base for the fire retardant paint on wood. Do not skip this step. You must use the standard primer recommended by the fire retardant paint manufacturer. An incompatible primer can prevent the fire retarding chemicals from working.
Apply the primer evenly with your chosen brush or roller. Follow the manufacturer’s instructions for coverage and, most importantly, for drying time. Rushing this step and applying paint to a tacky primer will lead to poor results.
Step 3: Apply the Fire Retardant Paint
Now you are ready for the main coating. Stir the paint completely, without shaking. If you shake the paint, it can create bubbles. Using your brush, roller, or sprayer, apply the first coat. Work in manageable sections to maintain a “wet edge,” which prevents overlap marks and ensures even coverage.
Pay close attention to the manufacturer’s instructions regarding the spread rate. Applying the fire retardant paint too thickly or too thinly can compromise its fire resistant properties. Most products require at least two coats. Allow the first, or primary, coat of paint to dry completely before considering the second coat.
Step 4: Allow for Proper Drying and Curing
After the final coating on wood, the paint must dry and cure fully. Drying time is when the surface is dry to the touch, but curing is when the paint has reached its maximum hardness and effectiveness. This can take several days.
During this period, ensure the room is well-ventilated. Do not touch the surface or place any objects against it. Factors like high humidity & cold temperatures can extend drying times, so be patient.
Step 5: Perform Final Inspection and Maintenance
Once the fire retardant paint is fully cured, inspect it carefully. Look for any thin spots or missed areas, and apply a touch-up coat if necessary. A uniform finish is key to consistent protection from the paint.
To maintain the fire retardant paint’s strength on wood, keep the surface clean. Dust it regularly with a soft cloth. Avoid using harsh chemicals or harsh cleaners, as they can degrade the coating. Periodically check for any chips or damage, especially in high-traffic areas.
Conclusion
To properly apply fire retardant paint on wood, prepare the surface, use a compatible primer, apply multiple thin coats as directed, and allow for full curing. This process ensures the coating effectively slows flame spread, increasing safety.
At Firefree Coatings, we offer high-performance fire retardant paint for wooden surfaces that is tested to ASTM E-84 standards. Our eco-friendly paint is easy to use and apply, providing reliable protection on various combustible materials. Contact us today!