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2653 Warfield Ave., Fort Worth, TX 76106 email:


Hotline:1-800-333-9197 After Hours 817-658-9197

Fire Retardant Lumber Fire Retardant Coating Testing About Us Contact Us
Abilene, Dallas, Fort Worth, San Antonio, Austin, Houston, Corpus Christi, Oklahoma City, Tulsa, Kansas City, St. Louis, Texas, DFW, Odessa, Shreveport, Lubbock,Amarillo, Reno, Branson,

Manufacturing process of plywood: A log of wood is softened with steam and then shaved into thin veneers (also referred to as plies). The thin veneers are allowed to dry and then coated with an adhesive. Each ply is laid in such a way that the grain direction of each ply is opposite to the ones above and below it. There are usually an odd number of plies so that the sheet is balanced. The entire stack is then treated in a hot press at high temperature and pressure to form plywood. Plywood is resistant to cracking, shrinkage, splitting, twisting/warping and has a high degree of strength. Pound for pound, plywood is stronger than steel in static bending strength.

Grade Description Grade Description
A/B Sanded face veneers practically free from all defects. Reverse veneers with only a few small knots or discoloration B/C Sanded face veneer with only a few small knots or dicoloration, Reverse side permitting jointed veneers, large knots, plugs, etc
A/C Sanded one side, reverse side permitting jointed veneers, large knots, plugs, etc. CDX Knots, knotholes, cracks, and all other defects permitted
The most common sizes of fire retardant plywood are: Fire retardant Softwood Plywood: Douglas Fir, -Southern Yellow pine (SYP)- Typically used for commercial construction - wall, floor, roof sheathing and backer board -usually CDX grade
4' x 8' x 1/4" [8/32"]
4' x 8' x 3/8" [12/32"] Fire retardant Hardwood Plywood: Ash,Birch, oak, mahogany-excellent strength, stiffness and resistance to creep - it has a high planar shear strength and impact resistance, which makes it especially suitable for wall panels,cabinets and trim.
4' x 8' x 1/2" [15/32"]
4' x 8' x 5/8" [19/32"]
4' x 8' x 3/4" [23/32"]
4' X 8' X 3/4" T & G Fire retardant Aircraft Plywood: Mahogany, birch, oak, other species available - high strength plywood
4' X 8' X 1-1/8" T & G

10' lengths available by special order including molding, trim & milwork

Fire retardant Marine Plywood: Manufactured from durable face and core veneers, with few defects so it performs better and longer in humid or wet conditions. It resists delaminating and fungal attack - used on docks, boats, and other marine applications
Inherent Flame Spread Rating for Untreated Plywood vs. Flame Safe Fire Retardant Treated Plywood
Size Species Untreated Flame Spread Flame Safe Fire Retardant Treated Size Species Untreated Flame Spread Flame Safe Fire Retardant Treated
3/8" Cedar 70-95 <5 1/4"-3/4" Ash- V core 134 <20
5/8" 70-95 <5 1/4"-3/4" Birch-V core 135-173 <20
1/4 Douglas Fir 150 <5 1/4"-3/4" Birch-Fuma V C 127 <25
3/8" 110-150 <5 1/4"-3/4" Birch-DF V C 114 <18
1/2" 130-150 <5 1/4"-3/4" Birch-High Density V C 114 <17
5/8" 95-130 <5 1/4"-3/4" Maple V C 124 <25
3/4" 95-130 <5 1/4"-3/4" Knotty Alder 134 <25
1/4" Southern Pine 95-110 <5 3/4" Honduras Mahogany-V C 105 <20
3/8" 100-105 <5 1/4"-3/4" African Mahogany 95 <20
5/8" 90 <5 11/64" Lauan 167 <35
3/4" 90 <5 1/4" 150 <25
1-1/8" 90 <5 1/4"-3/4" Oak-DF V core 153 <25
3/8" Redwood 95 <5 1/4"-3/4" Walnut -V C 123 <25
5/8" 75 <5  
1/2" Exterior Preservative Treated Plywood - MCA(micronized copper azole) 95-100 <5 3/16"





156 <25
5/8" 95-130 <5 3/8" 200 <25
3/4" 95-130 <5 1/2" 135-156 <25
  90-125 <5 5/8" 153 <25
3/8" Medium Density Fiberboard MDF 140 <25 3/4" 145 <25
7/16" 125 <25 3/4" 88-98 <25
5/8" 120 <25  
11/16" 140 <25 7/16" Oriented Strand Board OSB 86-150 <25
3/4" 130-140 <25 3/4" 147-158 <25
1" 90 <25 1-1/8" 74-172 <20

Fire Retardant Plywood & Fire Retardant Wood Treatments
Vacuum Pressure Impregnation and Kiln Dried After Treatment (KDAT)

Fire rated plywood ●Fire rated wood ●Fire rated lumber ●Fire rated timber

Exterior fire retardant lumberinterior fire retardant lumberexterior fire retardant plywoodinterior fire retardant plywoodinterior fire retardant wood specialtiesexterior fire retardant wood specialties exterior fire retardant timbersinterior fire retardant timberarchitectural millwork, molding & trimfire retardant OSB(oriented strand board) ● fire retardant particle board ● fire retardant MDF(medium density fiberboard) ● fire retardant shingles ● fire retardant Insulation ● fire retardant treated special order fire retardant treated lumber and plywood is a permanent guard against the spread of flame
FRT Plywood Flame Safe plywood is kiln dried to a moisture content not to exceed 15%. interior wood frame home
exterior lumber


For those specifications that call for an exterior fire retardant lumber or plywood that will have exposure to the elements or high humidity conditions Flame Safe XT is the product of choice.

In addition to passing the ASTM E84 Class A, UL Type 1 test for surface burning characteristics, which all exterior fire retardant lumber and plywood bearing a Class A stamp must pass, Flame Safe XT has passed the ASTM D2898 accelerated weathering (rain) test.

Flame Safe XT has a clear finish which can be stained with a water based stain or painted with a latex based paint. Flame Safe XT can be specified with preservative and decay resistant treatments such as MCA, ACQ, CCA and may be specified with a water repellant is so desired. Applications such as exterior decks, balconies, stairs or siding are the notable examples of where Flame Safe XTand preservative treated would be the logical choice

Permanence: Flame Safe interior fire retardant treated lumber and plywood is a permanent guard against the spread of flame. Strength: Flame Safe's aqueous based resin fire retardant treatment and kiln-drying process strengthens the wood
Hygroscopicity: Flame Safe's exterior and interior fire retardant plywood and lumber is no more hygroscopic than untreated wood of any given species

Corrosion: Flame Safe exterior and interior fire retardant plywood and lumber does not demonstrate any greater corrosion rate than untreated wood on metal fasteners or hardware
Decorating and Finishing: Flame Safe exterior and interior fire retardant plywood and lumber surfaces can be stained and painted with ordinary preparation, however avoid using lacquer based stains or varnishes
Field Cuts: Flame Safe exterior and interior fire retardant plywood and wood allows the user to re-surface, mill, or rip lumber or plywood provided the exposed surfaces are coated with Flame Safe fire retardant coating (Fire Poly)
Versatility: Flame Safe exterior and interior fire retardant plywood and lumber is compatible with most waterborne preservative treatments for lumber, plywood and timber for exterior and in ground use

    Flame Safe Wood Products vacuum pressure impregnated fire retardant plywood, fire retardant lumber, and fire retardant wood and Flame Safe Chemical’s fire retardant products have been tested by accredited third party testing agencies. Flame Safe warrants it’s products to perform as tested and will furnish test reports upon request, in addition to those published on our web site.
      In addition, Flame Safe Chemical manufactures a complete line of fire retardant coatings, fire retardant penetrants and fire retardant sprays that meet or exceed industry’s fireproofing standards. The effectiveness of Flame Safe’s fire retardant products are well documented.
      The uniqueness of Flame Safe’s fire retardant products are not only their simplicity of application, their low cost, their environmental safeness, their tested, proven certifications, but most importantly they are required by code. Fire codes are written and enforced to save lives and property.
      Uniquely, Flame Safe’s fire retardant coatings, sprays and penetrants are easily applied, colorless, non-toxic, environmentally safe, and are aqueous based fire retardants chemicals.
      Flame Safe has both interior and exterior fire protection coatings, penetrants, and fire retardant sprays for wood, wood products, architectural millwork, molding and trim, lumber, plywood, wood shingles, timbers, fiberglass and plastics, fabric, theater curtains, drapes, upholstery, carpet, mattresses and bedding, wall coverings, thatch, thatching, tiki huts, paper, cardboard and packaging systems for combustible liquids, dry grass, dry brush. The Fire Buster™ is a fire retardant treated fabric available for commercial and residential use.
      Flame Safe is dedicated to setting not merely following the fireproof industry standards through ongoing research development and testing programs. Flame Safe continually endeavors to educate the marketplace on the significance of fireproofing combustible materials through the use of fire retardant products.

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E84 steinner tunnel Steinner Tunnel ASTM E84 Class A UL723 UL Type 1 NFPA255

Fire is the most unpredictable and dangerous accidents that may occur in our environment. Ignition is one of the essentail fire properties of a material. The time to ignition depends of the species, moisture content, inherent variability of wood as a natural material. Once ignition has occurred, a layer of char is formed as the wood burns. The wood is converted to charcoal which has no strength.


Click below for more information on

Flame Safe Wood Products
Exterior and Interior Fire Retardant Plywood
Fire Retardant Wood - - Fire Retardant Treated Lumber - - Fire Retardant Timber & Timbers

Fire Rated Wood, Fire Rated Plywood, Fire Rated Lumber and Fire Rated Timber & Timbers

Flame Safe Chemical Corporation´s
Fire Retardant Spray on Coatings, Penetrants

Flame Safe Manufactures the most effective fire retardant coatings and sprays to fireproof fabric and fabrics for theatrical curtains, upholstery, canvas tents, mattresses, clothing, carpet, wall coverings, paper, cardboard, lumber, wood, plywood, timber and timbers, OSB, I-joists, thatch & thatching, polyurethane foam, styrofoam, Tiki huts, grass, brush, and fire retardant spray for Christmas trees

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2653 Warfield Avenue, Fort Worth, Texas 76106

Phone: 1-800-333-9197 or 1-817-740-9197

The information contained herein is the property of Fire Prevention Technologies d/b/a Flame Safe Chemical Corporation and Flame Safe Wood Products, Inc . copyright 1990 Revised 8/20/2009

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