NoxSilicone 55 – 100% Silicone Flat Roof Waterproofing (Ponding Water Resistant)

Standing water on your flat roof? NoxSilicone 55 is the only product that permanently resists ponding water without degrading.

NoxSilicone 55 is the ultimate waterproofing solution for flat roofs, RV roofs, and trailer roofs. Its 100% silicone high-solids formula creates an inorganic membrane that permanently resists standing water (ponding water) without breaking down — something no acrylic or elastomeric coating can do.

Extend the life of your flat roof by 15+ years with a single-coat application. No tear-off, no replacement — just permanent, industrial-grade waterproof protection.

Why NoxSilicone 55 Is the Best Flat Roof Solution

• 100% Silicone Formula — not acrylic, not elastomeric. Pure silicone that will never degrade from standing water
• Ponding Water Resistant — the only coating designed for roofs where water accumulates and sits for days. Zero water degradation
• Single-Coat Application — covers in one thick pass (3mm / 1/8"), saving time and labor. No second coat needed
• UV-Proof — does not crack, chalk, or lose flexibility under extreme sun exposure
• 15+ Year Protection — long-lasting waterproof membrane backed by proven performance
• Highly Flexible — stays pliable through extreme temperature swings without cracking
• Excellent Adhesion — bonds to EPDM, primed TPO, primed PVC, metal, concrete, modified bitumen, Hypalon, and most common roofing systems
• Can be used as a joint sealant — waterproof valleys, termination points, flashings, fasteners, seams, and panel joints

Recommended For

• Flat roofs (commercial and residential)
• RV and trailer roofs
• Modified bitumen roofs
• EPDM rubber roofs
• Metal flat roofs
• Concrete roof decks
• Any roof with ponding water issues
• Waterproofing flashings, seams, joints, and penetration points

Coverage

Single-coat application at 3mm (1/8") thickness.

• 1 pail (5 gallons / 18L) covers approximately 250 sq. ft.

Coverage may vary based on surface condition and porosity.

Available Colors

• White — standard color, in stock
• Gray — special order, additional $249.99 fee + 2-week lead time

How to Apply

1. Clean all surfaces with NoxCleaner degreaser — surfaces must be clean, dry, and frost-free
2. Apply one thick, even coat using a squeegee broom at 3mm (1/8") thickness
3. Allow to cure fully before exposure to rain or traffic

Application temperature: 41–140°F (5–60°C) Surface requirement: Clean, dry, and frost-free. Do not apply if surface temperature exceeds 140°F (60°C) Surface must be completely dry before application

Important: NoxSilicone 55 can only be recoated with silicone-based products. Do not apply acrylic or latex coatings over silicone.

What's in the Box

• 1x NoxSilicone 55 – 100% Silicone Waterproofing (5-gallon / 18L pail)

NoxSilicone 55 vs. Noxseal — Which One Do You Need?

• You have a flat roof with ponding water? → Choose NoxSilicone 55. It's the only product that permanently resists standing water without degrading.
• You have a metal or shingle roof? → Choose Noxseal. Elastomeric coating with multiple color options for sloped roofs.

NoxSilicone 55 = flat roofs & ponding water. Noxseal = metal & shingle roofs.

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