Colorite Premium
ColoRite Premium is a Paint system comprising hot-dip galvanized steel sheet with a minimum Zinc coating mass of 275 GSM that is painted on and oven cured with premium polyester in combination with a custom-formulated primer. This produces a normal paint dry film thickness of 25µm on the top surface (inclusive of Primer) and 10 µm on the bottom (inclusive of primer). ColoRite Premium was developed to provide durable material for exterior applications with very good weatherability and good formability.
Anti Weathering Limited Warranty: 10 Years (UNICOIL Technical terms and conditions applicable)
Substrate
Galvanized steel, minimum G90(275 GSM).
Standards and Grades
| Standard | Description | Sub-Strate Standard | Grades |
| SASO ASTM A755/ A755M | Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Pre-painted by the Coil-Coating Process for Exterior Exposed Building Products | SASO ASTM A653/A653M | CS-Type A, B, C
FS Type A, B SS33, SS37, SS40, SS50, SS55, SS60 & SS80 |
| ASTM A755/ A755M | Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Pre-painted by the Coil-Coating Process for Exterior Exposed Building Products | ASTM A653/A653M, ASTM A792/A792M
Aluminum Flat coils |
|
| EN10169 | Continuously organic coated (coil coated) steel flat products — Technical delivery conditions | EN 10346 | DX51D. DX52D
S220GD, S250GD, S280GD, S320GD, S350GD, S390GD, S420GD & S550GD |
| JIS G3312 | Pre-Painted Hot Dip Zinc Coated Steel Sheet and Strip | JIS G3302 | SGCC, SGCD1
SGC340, SGC400, SGC440 & SGC570 |
| AS 2728 | Prefinished/pre-painted sheet metal products for interior/exterior building
applications—Performance requirements |
AS 1397 | S250, S300, S350, S450, S550 |
Typical Uses
Roofing and Walling, Sandwich Panels, Garage Doors, K-Span, Cold Rooms, etc.
Dimensions: (For normal supply products)
| Thickness* (mm) – (TCTP) | Width** (mm) | Zinc Coating (GSM) |
| From 0.42 to 1.20 | 700 to 1300 | 275 (G90) |
*For grade SS50, minimum thickness is 0.46 mm
** For width less than 700 mm are supplied with slit edge
For specific dimensions please contact Sales and Marketing Dept.
TCT-P – Total Coated Thickness with Paint Film (Steel thickness + Zinc coating thickness + Paint thickness)
| Pretreatment | Corrosion resistance proprietary conversion coating. |
| Primer Coat | Universal Corrosion inhibitive Primer. Nominal thickness- 5µm each side |
| Finish Coat | Polyester based Custom formulated system. Nominal thickness-20 µm on the top or weather side. The finish coat is available on all RAL standard and other colors may be available on request. |
| Backing Coat | Foam compatible epoxy coat or Polyester based custom formulated off white. Nominal thickness: 5-7 µm. Back coat can be in the same topcoat color and DFT as required. |
| Gloss (60˚) | Nominal 30 ±5% Other gloss levels may be available on request |
Guaranteed Paint Properties
| Test | Test Method | Description | Results |
| Hardness (Pencil) | ASTM D 3363 | Pencil | F or harder |
| Adhesion -T bend | ASTM D 4145 | T-bend | 3T or less (No Pickoff) |
| Flexibility | ASTM D 4145 | T-bend | 3T or less (no cracking) |
| Adhesion – Reverse impact | ASTM D 2794 | Reverse impact | > 9 joules |
| Cross Hatch | ASTM D 3359 | Cross hatch | > No paint removal |
| Gloss 60˚ (%) | ASTM D 523 | Gloss | 30±5% |
| Color Difference | ASTM D2244 | Light colors | Δ E :≤1.0 |
| Medium Colors | Δ E :≤ 1.5 | ||
| Dark Colors | Δ E :≤2.0 / Visual match | ||
| Metallics | Visual match |
Expected Product Service Performance
| Property | Test Method | Description | Results |
| Resistance to UV (QUV-A) ASTM G53 | Exposure Hours | 1500 Hrs | |
| ASTM D2244 | Color Change | DE Hunterlab : Light color ≤4 Int.Color ≤6 Dark color ≤8 |
|
| ASTM D4214 | Chalking | ASTM Rating 4 – 2 | |
| ASTM D523 | % Gloss Retention | ≥ 40 | |
| Natural well washed exposure ASTM G7 | Exposure Hours | 7 Yrs | |
| ASTM D2244 | Color Change (Non Vertical) | DE Hunterlab – Light color ≤6 Int.Color ≤9 Dark color ≤12 |
|
| ASTM D4214 | Chalking | ASTM Rating 4 – 2 | |
| ASTM D523 | % Gloss Retention | ≥ 30 | |
| Resistance to corrosion (Salt Spray) ASTM B117 | Exposure Hours | 1000 Hrs | |
| ASTM D714 & ASTM D1654 | Blister Density, Size & Corrosion Creep | Blister density- Few, Blister size rating ≥8 Undercut from scribe ≤2mm | |
| Resistance to humidity at 38± 1°C ASTM D 2247 | Exposure Hours | 1000 Hrs | |
| ASTM D714 | Blister Density & Size | Blister density- Few, Blister size rating ≥8 | |
Resistance to Abrasion |
ISO 1518 | Scratch | ≥ 2000gms |
| Resistane to Heat (EN13523-13) | ASTM D2244 | 90°C – 700 hours or 60°C – 1000 Hours | ΔE ≤ 5 , ΔGloss ≤ 7% |
| Resistance to Fire | BS 476 Part 7 | Fire rating | Class M1 |
