Flamex PF-2 Exterior Fire Retardant Spray

(6 customer reviews)


SKU: PF2 Category:


Flamex PF-2 exterior wood fire retardant spray is a water-based, post-treatment fire retardant. Flamex PF-2 is also a wood preservative that penetrates the wood pores and seals itself within the substrate. This exterior fire retardant protects the wood by developing a self-extinguishing reaction in contact with an open flame.

flamex pf-2 fire retardant spray is excellent for sealing outdoor wood
Superior water resistance

When properly applied, the wood shall have a Class A rating. Flamex PF-2 contains polymers that maintain the flame retardancy for up to five years for exterior applications. Flamex PF-2 exterior fire retardant spray for exterior wood is non-toxic, non-combustible, non-carcinogenic, easy to apply, and contains no PDBE’s.

Laboratory tested as a leach resistant treatment for exterior wood.The durability of exterior fire performance for Flamex PF-2 exterior treated lumber has been confirmed to be maintained following exposure to the Standard Test Method for Evaluating Clear Water Repellent Coatings on Wood detailed in American Standard Test Method ASTM D5401 and is classified in accordance with ASTM E-84 Steiner Tunnel Test, meeting the requirements of US Standards for use in all exterior applications.

Proven stability from an exterior fire retardant spray

Flamex PF-2 formulation is non-hygroscopic which overcomes many of the disadvantages of conventional fire retardants. Besides it’s exterior durability, this product should also be used in situations where interior high humidity is a problem. Applying Flamex PF-2 on wood decking, fencing, framing, roof sheathing, wood shingles, cardboard etc., performs considerably better than conventional fire retardant systems in this respect.

Flamex PF-2 does not contribute to the corrosion rates of metals. 

Flamex PF-2 treated wood has a proven track record and can be used for all exterior or severe damp applications. Precious minutes can mean the difference between life or death.

Flamex PF-2 is a Class A rated flame retardant with a Flame Spread of 25 and Smoke Developed of 70 on wood. Since it penetrates and forms a molecular bond with the substrate, the life of the application shall be indefinite for most interior applications. For exterior applications, it is recommended that Flamex PF-2 be reapplied every 3 – 5 years depending on the amount of rainfall.


When Using This Product:

  • Do not mix with other products
  • Shake or mix well before using
  • Do not allow to freeze
  • Do not lay on another surface when wet to prevent mold and absorption by the other surface
  • Store in original container away from sunlight and heat
  • Pretest for applicability and color fastness
  • Surface must be clean and dry prior to application
  • Clean hands & equipment with soap and cold or warm water
  • Do not expose treated areas to moisture for 24 hours

Safety Guidelines:

  • Use in well ventilated area
  • It is recommended to wear a respirator when spraying this or any latex containing product indoors
  • If applicable, use approved safety devices (ropes, belts, ridge hooks, ladders, etc.)
  • Do not step on wet treated areas, surface may be slippery until dry
  • Avoid exposure to eyes
  • Keep away from children.

Weight N/A
Container Size

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

6 reviews for Flamex PF-2 Exterior Fire Retardant Spray

  1. James

    I live in Florida and treated our deck with the PF2. I also treated an extra piece of the decking that I had left over and laid it outside so I can test to see when I should reapply the fire retardant again. I did a burn test the other day with a cig lighter and it would not burn after outdoor in the rain for 3 years. As a matter a fact, the wood still beads water. Highly recommend this product for not only a flame retardant but also a wood sealent

  2. Bruce (verified owner)

    Verified reviewVerified review - view originalExternal link

    Delivery was fine, arrived undamaged. We’re wanting to leave our redwood deck natural not stained.. I saturated a 5ft wide area the whole 20ft length. The next day after it soaked in and dried we can barely tell the difference between the treated area and the rest.. I thought the one quart spray bottles would be easy to use but on a large area my hands got pretty cramped. Next time I’ll get gallon jugs for the weed sprayer. Great product though!

  3. Pamela Freese (verified owner)

    Verified reviewVerified review - view originalExternal link

    Great and prompt service. Product was super easy to use!

  4. James B. (verified owner)

    Verified reviewVerified review - view originalExternal link

    Applies like water, dries clear that’s all I know! I’m glad to have applied it under my balcony!

  5. Anthony (verified owner)

    Verified reviewVerified review - view originalExternal link

    I plan to buy more.

  6. Anonymous (verified owner)

    Verified reviewVerified review - view originalExternal link

    I received 2 gallons of Flamex PF-2 in short order after speaking with a company agent on the phone. My situation involved perhaps 240 square feet of application. Two gallons should cover 250 sq. ft. The agent’s recommendation was to apply the solution using a sprayer as the wood lay on the ground. [I was preparing to replace a fence.] In this manner there would be less runoff. Although this was a pain to do because of preparation (I did it in two steps because of the space all that wood took up), this worked out well. I have perhaps a quart left to do some final touch up once the fence is ‘hung.’ I am very pleased with the telephone transaction and the product!

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