Suitable for urban parks, residential gardens and suburban landscapes with moderate humidity, good ventilation and no high salt or acid mist. Only complete the mandatory pre-treatment (SA2.5 grade sandblasting + neutral degreasing) before use, then let the planter form a natural protective patina outdoors over 12–24 months. The key is to keep the planter's drain holes unobstructed to avoid standing water and uneven patina formation. This method features zero maintenance cost and retains the original natural rust aesthetic of weathering steel.
Ideal for high-salt coastal areas (1–3km from the sea), high-humidity southern regions, light industrial zones with slight dust/acid mist and heavy rainfall areas. After the patina matures naturally (12–24 months) or stabilizes for 1 week post-accelerated treatment, clean surface dust and spray 2 thin layers of UV-resistant, breathable polyurethane/silicone-based transparent sealer (special for weathering steel). Re-spray the sealer once every 1–2 years in coastal/industrial areas. It retains the patina's reddish-brown tone and texture while boosting corrosion resistance by 3–5 times, effectively preventing patina peeling and pitting corrosion.
Accelerated Patina + Transparent Sealer (For Fast Uniform Patina Aesthetic)
Perfect for projects with tight construction deadlines (e.g., commercial plazas, landscape hardscaping) that need a quick, uniform rust color, and it's adaptable to all outdoor environments including harsh ones. Do SA2.5 sandblasting and degreasing first, then apply a neutral patina accelerator and cure with water for 2–4 weeks to form a dense, even patina. After 1 week of natural stabilization, spray the same transparent sealer as above. This method shortens the natural patina cycle drastically and balances immediate visual effect with long-term corrosion protection.
Outdoor Weather-Resistant Coating (For Non-Rust Color Customization)
For design projects that require fixed non-reddish-brown colors (e.g., matte black, dark gray, forest green) while keeping SPA-H's structural strength and durability. After sandblasting to SA2.5 grade and full degreasing/drying, spray 2–3 layers of fluorocarbon or high-performance epoxy outdoor coating-these coatings are UV-resistant, fade-proof and peel-proof, isolating the steel from all corrosive media. Retouch the coating every 3–5 years for long-term outdoor use, and it's suitable for all harsh environments with color customization needs.
