Class A Fire Protection for Wood
Clear-drying, non-toxic chemistry that delivers Class A fire performance to interior framing, exterior assemblies, and wood components—without altering the natural appearance of the material.
Fire Protection
Class A fire protection that preserves the natural beauty of wood.
CitroTech 34 (MFB-34) is a Class A fire inhibitor for wood, engineered to enhance ignition resistance without affecting the natural look, feel, or structural properties of lumber. The formula dries clear, is non-toxic, low-VOC, and suitable for both interior and exterior assemblies.
Meets ASTM E84 requirements for flame spread and smoke development.
Maintains the natural appearance and grain of treated wood.
No PFAS, no halogens, and GREENGUARD Gold–recognized ingredients.
Designed for long-term performance in framing and finish applications.
Product Formats
The same Class A fire inhibitor for wood, packaged for everything from a single build to factory-scale treatment programs. Mill, distributor, and volume programs are quoted directly — talk to our team.
Ready-to-use liquid · no mixing required
The right size for individual builds, remodels, and on-site treatment of framing and finish lumber.
Ready-to-use liquid · mid-bulk tank
Mid-bulk supply for production framers, treatment yards, and multi-home projects.
Ready-to-use liquid · bulk IBC tote
Bulk IBC supply for sawmills, factory treatment lines, and lumber-industry partners.
How It Works
CitroTech-34 is applied directly to wood, where it dries clear and integrates with the surface fibers. Once cured, it enhances ignition resistance and reduces flame spread—helping treated assemblies achieve Class A fire performance without altering the wood’s natural appearance or properties.
Applied to lumber or wood assemblies using spray or factory treatment methods.
Dries transparent with no change to the wood’s natural appearance.
Enhances ignition resistance and limits flame spread at the wood surface.
CODE & COMPLIANCE
CitroTech-34 is evaluated against the standards building officials, architects, and specifiers actually reference. Full reports are available for your submittal package.
Technical Evaluation Report assessing compliance with International Building Code (IBC) and International Residential Code (IRC) fire-protection requirements — the document plan reviewers ask for.
Standard surface-burning test measuring flame spread and smoke development. CitroTech-34 achieves a Class A rating, the highest classification.
30-minute extended sustained-fire exposure test. Result: Pass — no flame spread.
Certifies low chemical emissions for use in occupied environments — relevant wherever treated wood is used in interior assemblies.
Trust & Compliance
Our products undergo rigorous third-party testing to ensure the highest standards of safety and performance.
Low chemical emissions for safe use around people and animals.
Non-toxic certification (LC₅₀ > 750 mg/L).
Independent validation of ignition resistance.
Get connected with our team to learn how CitroTech can help safeguard your home, business, or community.
