An exposed metal anti-corrosion protection system for prepared color steel roofs, container shells and light-gauge metal surfaces. It helps improve metal adhesion, seal local weak details and protect outdoor surfaces exposed to rust risk, screw holes, lap seams, rain, UV, salt spray and weathering.
Metal primer interface + local thick-film detail sealing + exposed anti-corrosion topcoat
Metal primer interface for cleaned and rust-treated metal surfaces
Hand-scraped thick-film sealing for seams, screw holes and local weak details
Exposed polyaspartic topcoat for outdoor metal corrosion and weathering protection
The system separates metal adhesion preparation, local weak-detail sealing and exposed surface protection, helping reduce corrosion recurrence, leakage paths and outdoor weathering risks on color steel roofs and container shells.
BW8008 is applied to cleaned and rust-treated metal surfaces to create a stable primer interface before detail sealing and topcoat application. It helps support adhesion and anti-corrosion interface stability on prepared metal, especially around rust-treated spots, old coating transitions and exposed panel edges.
BW6-9526 is used around lap seams, screw holes, fasteners, panel joints, rust pits and local cracks before the exposed topcoat is applied. Its hand-scraped thick-film build helps reinforce detail areas where water entry, movement and localized corrosion often start.
BW0-8028 forms the exposed polyaspartic anti-corrosion topcoat over the prepared metal system. It helps improve outdoor weathering resistance, UV stability, color retention and long-term surface protection for color steel roofs and container shells.
Color steel roof and container corrosion often starts from small weak points: rust spots, chalking old coating, lap seams, screw holes, fasteners, panel overlaps, edges, container corners, weld seams, UV exposure, rain and salt spray. The BW8008 + BW6-9526 + BW0-8028 system helps reduce these risks through a controlled route from surface preparation to primer application, local detail sealing and exposed topcoat protection.
Clean and inspect the color steel roof or container shell before coating work begins. Remove loose rust, oil, dust, chalking layers, weak old coating and other contamination, while reviewing rust spots, panel overlaps, fasteners, weld seams, edges and detail repair scope before primer application.
Apply BW8008 over cleaned and rust-treated metal surfaces to create the primer interface before detail sealing and topcoat work. Control primer coverage, target film thickness and recoat timing so the following BW6-9526 and BW0-8028 layers are applied over a stable prepared surface.
Use BW6-9526 for lap seams, screw holes, fastener areas, panel joints, rust pits, local cracks and weak detail zones. This hand-scraped thick-film layer helps reduce detail-related corrosion and leakage paths before the exposed topcoat is applied.
Apply BW0-8028 as the exposed anti-corrosion and weather-resistant topcoat over the prepared and detail-treated metal surface. It helps protect color steel roof panels and container shells from UV exposure, rain, salt spray, surface aging and long-term outdoor service conditions.
System-relevant values for color steel roofs and containers: metal adhesion, local detail sealing, movement tolerance, salt spray resistance and exposed topcoat weathering.
| Item | Test standard / reference | Result |
|---|---|---|
| Density | GB / T 6750-2007 | 1.08 g/cm³ |
| Cathodic disbonding | Physical Properties | ≤15 mm |
| Dry metal adhesion | ASTM D-3359 | 11.5 MPa or substrate broken |
| Temperature variation | GB / T 9278-1988, -40 to +180°C, 24 h | Normal |
| Acid resistance | 50% H2SO4 or 15% HCl, 30 d | No corrosion, no blistering, no peeling |
| Oil resistance | 0# diesel and crude oil, 30 d | No corrosion, no blistering, no peeling |
| Salt spray resistance | Chemical Resistance | 1000 h, no corrosion, blistering or peeling |
| Item | Test standard / reference | Result |
|---|---|---|
| Elongation | GB / T 23446-2009 | 320% |
| Density | GB / T 6750-2007 | 1.25 g/cm³ |
| Solid content | Product Information | ≥80% |
| Tear strength | GB / T 23446-2009 | 60 kN/m |
| Tensile strength | GB / T 23446-2009 | 19 MPa |
| Abrasion resistance | HG / T 3831-2006 | 8 mg |
| Salt spray resistance | Chemical Resistance | 2000 h, no corrosion, blistering or peeling |
| Item | Test standard / reference | Result |
|---|---|---|
| Impact strength | GB / T 1732 | 50 kg·cm |
| Pencil hardness | Product Information | H |
| Abrasion resistance | HG / T 3831-2006 | 5 mg |
| Impermeability | Physical Properties | 2.1 MPa |
| Accelerated aging | GB / T 14522-1993, 1000 h | Loss of light <1; chalking <1 |
| Salt spray resistance | Chemical Resistance | 3000 h, no corrosion, blistering or peeling |
| Acid / alkali / salt resistance | Chemical Resistance | 40% H2SO4 or 10% HCl, 40% NaOH, 60 g/L salt, 240 h |
The above values are selected from the current product-detail Product Information, Physical Properties and Chemical Resistance tables. Final film thickness and suitability should be confirmed according to substrate condition, service exposure, detail design, project specification and the latest approved technical data sheet.
Before handover, key inspection should focus on metal surface readiness, BW8008 primer condition, BW6-9526 detail sealing and BW0-8028 exposed topcoat quality.
Confirm the prepared metal surface and primer condition before detail sealing and topcoat work.
Review BW6-9526 around local weak points before the exposed topcoat is applied.
Check the exposed topcoat surface before service.
Use these checks to judge whether the BW8008 + BW6-9526 + BW0-8028 system is suitable before final specification.
For prepared color steel roof panels where rust spots, aged coating, lap seams, screw holes and outdoor weathering need anti-corrosion review. Review outdoor exposure before confirming suitability.
For container panels, corners, weld seams and exposed shells where rain, UV, salt spray and old coating condition need to be reviewed before protection.
For lap seams, screw holes, fasteners, panel joints and overlaps where local sealing is required before the exposed topcoat is applied.
For exposed light-gauge metal surfaces where rust condition, old coating adhesion, panel movement and topcoat compatibility can be reviewed. Review light-gauge steel before confirming suitability.
Do not finalize material consumption from area alone. Confirm metal surface condition, old coating adhesion, rust treatment level, seam length, screw-hole density, repair scope, target DFT, topcoat color, weather or salt-spray exposure and inspection requirements before ordering.
Common questions about using BW8008, BW6-9526 and BW0-8028 for color steel roofs, container shells and exposed light-gauge metal protection.
