Carboxane 2100 BR - Bio-Resistant Epoxy Polysiloxane Topcoat

Carboxane 2100 BR is an isocyanate-free, ultra-durable, fungal-resistant modified siloxane hybrid topcoat engineered by Carboline to combat Baudoinia and other black fungal growth commonly found in environments with ethanol and alcohol vapors. This fast-cure, high-solids coating delivers outstanding color and gloss retention that exceeds many acrylic aliphatic polyurethanes — while providing excellent corrosion protection that can be applied direct to metal (DTM). Ideal for distilleries, wineries, ethanol storage tanks, and bakeries, Carboxane 2100 BR keeps substrates looking clean and protected for years. VIEW THE ENTIRE LINE OF CARBOLINE COATINGS HERE › Key Features: Pronounced Fungal & Bacterial Growth Inhibition: Exhibits broad-spectrum growth inhibiting activity against Baudoinia and other bacteria and fungi thriving in ethanol and alcohol vapor environments — field tested for over 2½ years of resistance. Isocyanate Free: Safer formulation eliminates isocyanate hazards without sacrificing performance or durability. Fast Cure with Good Pot Life: Dry to the touch in as little as 1 hour at 90°F (32°C), with a 5-hour pot life at 75°F (23°C) — significantly speeds up project timelines. Excellent Weathering Performance: Meets SSPC Coating Spec. No. 36 Level 3A — the highest level for polyurethanes — for long-lasting exterior color and gloss retention. Direct to Metal (DTM) Application: Can be applied in 1–2 coats instead of the typical 2–3 coat systems, saving significant time, labor, and money. Excellent Corrosion Protection: Meets ISO 12944-6 C3 High and C4 Medium ratings when applied as a single coat DTM. Low VOC: Less than 100 g/l as mixed — meets the most stringent field-applied coating VOC regulations. Common Industry Applications: Ethanol Storage Tank Exteriors: Resists Baudoinia black fungal growth on tank shells and roofs exposed to ethanol and alcohol vapors. Distilleries & Spirits Maturation Facilities: Protects structural and tank exteriors in alcohol-vapor-rich environments where black mold is a persistent problem. Wineries: Provides long-term exterior protection and fungal resistance on tanks and facility structures in winery environments. Bakeries: Guards against biological growth on exterior surfaces in yeast- and fermentation-adjacent environments. General Industrial & Commercial Exteriors: Suitable for urban to light industrial exposures (C1–C4 per ISO 12944) — steel structures, equipment, and facades requiring durable, low-maintenance finishes. Carboxane 2100 BR is SOLD IN 1-GALLON & 5-GALLON KITS, INCLUDING PARTS A & B. Product type: Fungal Resistant Modified Siloxane Hybrid Carboxane 2100 BR has a Gloss finish Available colors: 1864 White, C703 Grey, C705 Light Grey (limited additional colors available on request) Applied via Airless Spray, Brush, or Roller Mixing: 4:1 Ratio Part A to Part B Dry Film Thickness: 3–7 mils (76–178 microns) per coat Looking for a bio-resistant topcoat for your project? Contact us today to discuss your project: (800) 567-5358