Rawlins Paints Blog Industrial Paint Tips, Guidelines & DIY Articles
If you’ve ever wondered whether it’s possible to paint over fire retardant paint, you’re not alone. Many people face this question when redecorating or ensuring their surfaces remain protected while achieving a desired finish. The answer, however, depends on various factors, including the type of paint, the surface in question, and the compatibility of topcoats. By the end of this post, you’ll have a clear understanding of the rules, challenges, and best practices for painting over fire retardant paint.
Understanding Fire Retardant Paint
What is Fire Retardant Paint?
It’s a specialist coating designed to reduce the flammability of treated surfaces. It works by slowing the spread of fire or delaying ignition, providing crucial extra time in an emergency. Commonly used on wood, steel, and other building materials, these paints are an essential part of passive fire protection systems in homes, businesses, and public spaces.
Types of Fire Retardant Paint
There are various types of fire retardant coatings, including:
- Intumescent Paints: These swell when exposed to fire, forming a char layer that insulates the surface beneath.
- Fire Resistant Paints: These are generally hard coatings that do not swell but resist fire and flame spread.
- Firestopping Coatings: Used to seal gaps and joints to prevent fire and smoke from spreading.
Each type has specific application methods and requirements, particularly when it comes to recoating or repainting.
Thermoguard Thermocoat Intumescent paint for steel and cast iron, available at Rawlins
Can You Paint Over Fire Retardant Paint?
The Importance of Compatibility
Yes, you can paint over fire retardant paint, but the process is not as simple as applying any standard paint. Fire retardant systems are carefully designed, meaning all components – including primers, basecoats, and topcoats – must work together. Using an incompatible topcoat can compromise fire protection, rendering the system ineffective.
Approved Topcoats
Always use an approved, compatible topcoat recommended by the fire retardant paint manufacturer. These topcoats have been tested to ensure they don’t interfere with the fire protection properties of the underlying coating. If unsure, seek advice from Rawlins Paints or the manufacturer before proceeding.
Painting Over for Redecoration
When a surface already coated with fire retardant paint has a topcoat applied (for decorative purposes), you can repaint it once or twice. However, you must follow these guidelines:
- Avoid Excessive Thickness: Applying too many layers can compromise the performance of the intumescent coating beneath. Fire retardant coatings often rely on a specific thickness to work effectively.
- Light Abrasion: If changing the topcoat colour, lightly abrade the existing layer to ensure proper adhesion. Use fine sandpaper and avoid damaging the fire retardant coating.
- Seek Technical Advice: Where the original topcoat has been discontinued or superseded, consult Rawlins or the manufacturer for an approved alternative.
Specific Applications
Steel Beams in Commercial Settings
Steel beams are frequently treated in kitchens, offices, restaurants, and other commercial spaces. These coatings are often left exposed and decorated for aesthetic purposes. Repainting such surfaces requires careful consideration. Ensure the new topcoat is compatible and doesn’t add unnecessary thickness.
Wooden Surfaces
Wood treated with fire protection coatings, such as in residential homes or public spaces, can also be repainted. Follow the same principles: use compatible topcoats, avoid excessive build-up, and seek guidance if unsure about existing coatings.
Shop Zeroflame fire retardant paints and treatments, at Rawlins.
FAQs: Addressing Common Questions
Can I paint over fire resistant paint for wood?
Yes, but only with a compatible topcoat. Ensure the additional layer doesn’t compromise the fire retardant properties.
Can I paint over fire resistant paint for metal?
Yes, but consult the manufacturer or Rawlins for compatible topcoats. For steel beams, ensure the system remains effective against fire.
Can you paint on top of intumescent paint?
Yes, but the topcoat must be approved. Avoid adding too much thickness, which can reduce the intumescent coating’s effectiveness.
Can you paint over firestopping?
Firestopping materials can often be coated for decoration, but only with products approved for use in fire protection systems. Consult technical advice before painting.
Can you paint over intumescent paint with regular paint?
Not directly. Regular paints may not be compatible and could reduce fire performance. Use an approved decorative topcoat instead.
Why Compatibility Matters
Painting over fire retardant paint isn’t just about aesthetics. It’s about maintaining safety standards. The wrong topcoat could jeopardise the system, leaving surfaces vulnerable in a fire. Systems exist to ensure every component, including primers and topcoats, works together to deliver optimal fire protection.
Conclusion
Painting over fire retardant paint requires knowledge, precision, and the right materials. By using compatible topcoats and following best practices, you can redecorate safely without compromising fire protection. If you’re unsure about compatibility or require guidance for a specific project, leave a comment below for Rawlins’ Technical Experts to review. Their expertise ensures you’ll get it right the first time.