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Trusted by general & framing contractors, trade show fabricators, and commercial architects.

Protect Interior Wood & Lumber with Flamex PF-1 Fire Retardant.

ASTM E84 Class A Flame Spread Rating Penetrating Clear Finish Zero VOC / Non-Toxic & Odorless

Price range: $19.00 through $1,720.00

A fire retardant spray solution from National Fireproofing Supply Co. designed for interior porous materials, with convenient size options to support touch-up jobs, maintenance programs, and larger-volume project needs.

■ Non-Toxic, Class A Rated By SGS Laboratories
■ For use on paper, unfinished interior wood, and straw.
■ Class A rated with a 25 flame spread 95 smoke developed.
■ Non-toxic, odorless and easy to apply
■ Quantity Discounts For 5+ Containers
■ Free Shipping On 55 Gallon Drums  (Lower 48 States Only)

125
Sq Ft Coverage
Per Gallon (Raw Wood)

Flamex PF-1 Fire Retardant Spray for Paper & Displays

Ensure your commercial exhibits, retail installations, and creative projects are fully safe and code-compliant with Flamex PF-1 paper fire retardant spray. Lightweight cellulose materials like paperboard and corrugated cardboard are incredibly vulnerable to stray sparks and open flames. Flamex PF-1 provides a specialized, penetrative protective barrier that cools the substrate upon contact with heat, drastically reducing flame spread and smoke development to secure a Class A or B rating depending on coverage.

The premier advantage of Flamex PF-1 is its fast-drying, anti-moisture chemistry. Traditional liquid fireproofing agents warp, wrinkle, or ruin thin cellulose materials. Flamex PF-1 is engineered as a highly effective, non warping flame retardant for crafts and temporary displays, leaving your structures perfectly flat, rigid, and vibrant. Tested to compliant standards including ASTM E-84 and UL 723, this eco-friendly solution gives decorators and tradeshow exhibitors the power to satisfy strict fire marshal protocols without sacrificing aesthetic quality.

Key Features & Specifications:

  • Class A Performance: Capable of achieving elite Class A fire safety metrics under ASTM E-84, NFPA 255, and UL 723 testing.

  • Anti-Warping Technology: Specially optimized fire retardant spray for paper and cardboard that prevents bubbling or structural bending.

  • Multi-Surface Indoor Utility: The perfect trade show display fire retardant for booths, backdrops, papier-mâché, posters, and wallpaper.

  • User-Friendly Application: Odorless, non-hazardous, clear-drying formula that allows surfaces to be painted with latex coatings once cured.

  • Note: Looking to secure interior fabrics, drapes, or clothing? Check out Flamex PF. For high-humidity indoor zones or outdoor timber, transition to Flamex PF-2.

Additional information

Weight N/A
Dimensions N/A
Size:

Quart, Quart Case, Gallon, Gallon Case, 5 Gallon Pail, 55 Gallon Drum

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ASTM E84 / UL 723

Class A Tunnel Test Surface Burning Rating

NFPA 101 Life Safety

Class A Interior Wall & Ceiling Finish Standard

NFPA 255 / UBC 8-1

Standard Test of Surface Burning Characteristics

Formulated For Wood & Lumber

Why Professionals Specify Flamex PF-1

Unlike topical coatings or thick paints that peel and flake, Flamex PF-1 deeply penetrates wood cellulose pores to form an integrated, permanent fire-suppression matrix without masking natural wood grain.

Deep Cellular Penetration

Penetrates deep into wood pores and grain without surface build-up, preserving natural grain character and allowing staining or top-coating.

  • Zero whitening, hazing, or chalky residue
  • Compatible with compatible stains & sealers

Intumescent Carbon-Char Shield

Thermally decomposes when exposed to flame to create an insulating carbonaceous barrier that cuts off oxygen and prevents flame propagation.

  • ASTM E84 Class A Flame Spread Index ≤ 25
  • Dramatic reduction in combustible smoke generation

Non-Toxic & Clean Indoor Air

Water-based formulation free of halogens, and polybrominated diphenyl ethers. Safe for occupied interior spaces, classrooms, and offices.

  • Zero VOC & odorless once fully cured
  • Safe around construction crews & building occupants
Substrate Compatibility

Wood & Substrate Classifications

Flamex PF-1 requires an unsealed, absorbent porous wood substrate for maximum cellular penetration. Review our substrate compatibility guide before treatment.

Recommended Substrates (Ready to Treat)

Raw Dimensional Lumber & Framing

Pine, Douglas Fir, Spruce, Hemlock, Southern Yellow Pine studs, joists, and structural timber.

Interior Plywood & OSB Sheathing

Standard unsanded and sanded interior grade sheathing, oriented strand board, and decorative wood veneers.

Hardwoods & Architectural Millwork

Oak, Maple, Birch, Poplar, Walnut – excellent absorption and grain clarity on unsealed surfaces.

Decorative Wood Slats & Acoustic Panels

Interior architectural battens, ceiling wood panel systems, and commercial timber wall features.

Theatrical Scenic Wood & Exhibition Flats

Unsealed timber risers, stage flats, convention booths, and trade show temporary timber installations.

Special Considerations & Incompatibles

Sealed, Painted, or Varnish-Treated Wood

Existing polyurethane, lacquer, paint, or wax sealers prevent penetration. Must be sanded to bare raw wood.

Pressure-Treated Exterior Wood

CCA/ACQ treated woods have high chemical saturation; conduct a penetration absorption test first.

Extremely Dense Resinous Exotics

Teak, Ipe, or heavily oily woods require surface alcohol wiping and verified moisture absorption testing.

High Moisture Content (> 15% Moisture)

Lumber with high moisture content will resist absorption. Allow kiln drying or proper jobsite acclimatization.

Laboratory Verified

Technical Specifications & Data

Comprehensive chemical physical data, test standards, and environmental ratings for Flamex PF-1.

Property Specification Value
Physical State & Appearance Clear aqueous liquid, non-foaming, non-corrosive
Specific Gravity 1.10 – 1.14 @ 20°C
pH Balance 6.8 – 7.4 (Neutral)
Odor Odorless when dry (Negligible sweet scent wet)
Flash Point Non-flammable (Water-based)
Coverage Rate 300 – 350 sq. ft. per gallon on raw lumber / plywood
Technical Data Sheet View & Download
Fire Test Standard Test Results Status / Authority
ASTM E84 (UL 723) Tunnel Test Flame Spread Index (FSI) ≤ 25 (Class A Rating) SGS Laboratories
Smoke Developed Index (SDI) Smoke Index ≤ 50 (Well under Class A 450 limit) ASTM E84 Tunnel Protocol
NFPA 255 / NFPA 101 Compliant for Interior Finish Materials Life Safety Code Baseline
Uniform Building Code (UBC 8-1) Class 1 Fire Retardant Treatment Approval Model Building Code Compliant
Safety Metric Value & Status
VOC Content 0.0 g/L (Zero Volatile Organic Compounds)
Toxicity Free of PBDEs, chlorine, bromine
Disposal Classification Non-hazardous waste classification
Shelf Life 5 years in original sealed container (Protect from freezing)
Skin & Eye Safety Non-irritating when dried; mild aqueous rinse wet
Safety Data Sheet View & Download
Simple Workflow

How to Apply Flamex PF-1 to Interior Wood

Follow these four straightforward steps to achieve fire marshal inspection certification on any lumber or millwork project.

1

Surface Prep & Moisture Check

Ensure wood is raw, unsealed, clean, and dust-free. Verify moisture content is below 15% using a pin meter before treatment.

2

Spray, Brush, or Roll

Apply Flamex PF-1 evenly using an airless sprayer, HVLP, or soft bristle brush at 300–350 sq. ft./gal until wood is thoroughly saturated.

3

Penetration & Drying

Allow 16 to 24 hours of natural drying at room temperature. Wood fibers absorb the chemical with zero film crust or hazing.

4

Inspect & Certify

Issue official Certificate of Flame Resistance compliance documentation for local fire marshal and building inspector sign-off.

Common Questions

Frequently Asked Questions

Everything you need to know about fabric flame retardant regulations, application, and lifespan.

No. Flamex PF-1 is a water-clear penetrating compound that absorbs directly into the cellulose structure of raw wood. Once cured (16-24 hours), it leaves no surface haze, powdery whitening, or glossy film. The natural wood grain, color tone, and tactile texture remain intact.

Yes. For best results, apply water-based or solvent-based stains prior to applying Flamex PF-1 (ensuring stain is thoroughly dry), or apply breathable topcoats once Flamex PF-1 has fully dried for 24-48 hours. Always conduct a small sample mockup on scrap wood to confirm adhesion and aesthetic compatibility.

When exposed to intense heat or direct flame, the active chemical compounds within the wood fibers react by forming a dense, carbonaceous char barrier. This insulated barrier cuts off oxygen to the combustible wood cellulose, rapidly suppressing flame propagation and yielding a Flame Spread Index (FSI) ≤ 25.

For standard dimensional lumber, plywood, and softwoods, one heavy wet coat or two light wet-on-wet coats achieving the specified coverage rate of 125 sq. ft. per gallon for 1/2″ thick wood substrate provides certified Class A performance. Allow each coat to penetrate to prevent pooling and facilitate full absorption.

Yes. Flamex PF-1 is certified under ASTM E84 (UL 723), Interior Wood Registrations, and NFPA 255. A Certificate of Flame Resistance compliance is issued upon request and can be submitted directly to local code authorities and building inspection departments.

Direct Technical Support

Our technical support can assist commercial designers, production managers, and decorators with testing advice, coverage calculations, and bulk freight options.

Direct Phone Line
+1 (219) 926-1477
BUSINESS HOURS
Mon – Fri: 8:00 AM – 5:00 PM CST

Technical Support Contact Form