High-Performance Fire Retardant Additive

Transform your standard paints and stains into code-compliant, professional-grade, Fire Marshal-approved fire retardant additive from National Fireproofing Supply Co. Designed for versatility, our additive allows contractors, manufacturers, and DIYers to infuse flame-retardant properties directly into paint or stain coatings without compromising structural integrity or finish quality.

Whether you are treating water-based or solvent-based paints,  stains, our product includes a specialized formula to meet your specific substrate needs. In compliance with CSFM 12-7A-4.8 safety standards, we offer a PFAS-free and halogen-free option that helps projects meet ASTM E84 (Class A) requirements.

Frequently Asked Questions: Paint & Wood Stain Additives.

Q: Does adding this fire retardant additive change the color or finish of my paint?

A: When mixed at the recommended ratios (typically 12 ounces per gallon), our additive ‘Dek Gard’ is designed to be ‘finish-neutral.’ It integrates into the liquid without changing the tint, sheen, or drying time of most high-quality water-based paints and stains. We always recommend a small “test batch” to ensure compatibility with your specific brand of finish.

Q: Will adding this to regular paint give me a Class A fire rating?

A: Our additive is tested to help systems achieve a Class ‘A’ Flame Spread Rating according to CSFM 12-7A-4.8 standards. However, because the additive only treats the “skin” (the paint layer) and not the wood underneath, fire marshals often recommend a “system approach”: apply a penetrating fire retardant spray to the raw wood first, then use your additive-treated paint as the decorative topcoat.

Q: Is the fire protection permanent once it’s mixed in?

A: The protection lasts as long as the paint film remains intact. Unlike sprays that can wash off, an additive is locked into the cured paint or stain. However, if the surface is sanded or heavily weathered, or the paint begins to peel, or the stain begins to fade, a fresh coat of treated paint or stain must be applied to maintain the fire rating.

Q: Can I use a wood stain additive on top of a previously sealed deck?

A: No. Additives must be mixed into the penetrating stain and applied to raw, unsealed wood so the treated finish can bond properly. If your wood is already sealed, you must strip the old finish or use an exterior paint with the additive instead.