Carboxane 2000 - Polysiloxane Topcoat for Superior Weathering

Carboxane 2000 is an isocyanate-free, ultra-durable modified siloxane hybrid topcoat engineered by Carboline for extreme long-term weathering performance, color and gloss retention, and corrosion protection on exterior structures. Its tightly cross-linked UV-resistant siloxane binder far exceeds the weathering durability of even high-grade aliphatic polyurethanes — and when used over a suitable primer, a single finish coat replaces the performance of a conventional 3-coat system, eliminating the intermediate epoxy coat and saving significant time, labor, and money. VIEW THE ENTIRE LINE OF CARBOLINE COATINGS HERE › Key Features: Exceeds SSPC Coating Spec. No. 36 Level 3A: Surpasses the highest weathering standard for polyurethanes — delivering extreme UV stability, long-term chalk resistance, and outstanding color and gloss retention across demanding exterior exposures. 2-Coat System Replaces 3-Coat: Over a suitable primer, Carboxane 2000 provides the barrier and corrosion resistance normally requiring a primer, epoxy intermediate, and polyurethane topcoat — eliminating a full coat and reducing labor costs. Isocyanate Free: Safer formulation eliminates isocyanate hazards without sacrificing performance or durability. Long Pot Life: 8-hour pot life at 75°F (23°C) gives applicators exceptional working time on large projects — one of the longest pot lives in its class. Excellent Corrosion Protection: Meets ISO 12944 C3 High and C4 Medium ratings at 5–7 mils DFT. When combined with a zinc-rich priming system, delivers extreme long-term corrosion and weathering protection. High Build, 3–7 Mils DFT: High-build formula with excellent barrier properties — often eliminates the need for an intermediate coat for significant labor savings. Flame Spread Index 0 / Smoke Developed Index 10: Low flame spread and smoke development characteristics for projects with fire performance requirements. Full Color Availability: Available in custom colors per the Carboline Color Guide — specified to exact project color requirements. Common Industry Applications: Bridge & Highway: Extreme UV and weathering resistance extends repaint cycles on high-visibility structures — reducing lane closures and lifecycle maintenance costs. Oil & Gas / Offshore: Exceeds SSPC No. 36 Level 3A weathering; pairs with zinc-rich primers for extreme long-term protection on offshore and petrochemical structures. Marine: High-build barrier properties and corrosion resistance for marine atmospheric exposures where long service life is critical. Water & Wastewater: Durable gloss finish with long-term color retention for water infrastructure, supporting Flame Spread Index 0 / Smoke Developed Index 10 requirements. Power: UV-stable siloxane binder maintains appearance and protection on power generation structures in harsh weathering environments. Architectural & Commercial: Custom colors with long-term chalk resistance for high-visibility commercial and architectural facades requiring minimal repainting. Carboxane 2000 is SOLD IN 1-GALLON & 5-GALLON KITS, INCLUDING PARTS A & B. Product type: Modified Siloxane Hybrid Carboxane 2000 has a Gloss finish Available colors: Refer to Carboline Color Guide — custom colors available Applied via Airless Spray, Brush, or Roller Mixing: 2.2:1 Ratio Part A to Part B Dry Film Thickness: 3–7 mils (76–178 microns) per coat Looking for a high-performance siloxane topcoat for your project? Contact us today to discuss your project: (800) 567-5358