Zirca-Sil: Durable Protection for Demanding Metal Finishes

Zirca-Sil is a cutting-edge zirconium-silicate based sealant from Astra, engineered to enhance the durability and appearance of treated and coated metal surfaces. By forming a dense, adherent silicate barrier, it protects against corrosion, mild chemical exposure and mechanical wear, while maintaining surface gloss and finish integrity.

Key Features & Benefits

• Strong corrosion resistance: forms a zirconium-silicate barrier that shields metal surfaces against rust, oxidation, and environmental degradation.
• Chemical durability: withstands exposure to mild acids, alkalis and other chemical agents often encountered in industrial or outdoor settings.
• Gloss retention & finish protection: preserves the visual appeal of painted or coated surfaces by resisting wash off, staining or dulling.
• Environmentally safe: free of hazardous heavy metals; formulated to meet international safety, environmental & worker-health standards.
• Easy application & compatibility: compatible with pretreated, phosphated, anodized, or otherwise finished metal surfaces; apply by immersion or spray.

Typical Application

• Outdoor architectural metal work
• Appliance and hardware finishes
• Electrical enclosures
• Metal parts exposed to chemical or outdoor exposure

Why Choose Zirca-Sil at Astra

Built on Astra’s strong R&D foundations, Zirca-Sil benefits from precise manufacturing, in-house testing, and full technical support. It's ideal for customers who require long-lasting protection without compromising on look or environmental compliance. Each batch undergoes rigorous testing (adhesion, gloss, salt spray) to ensure it meets demanding performance and quality standards.