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Molawan Thermo-Cool
Molawan Thermo-Cool is a cost effective pre-painted steel developed to provide durable material for exterior applications with High Thermal reflectivity. The paint is a thermal reflective paint, consisting of special ceramic pigments, applied on a Galvanized substrate of 90 GSM minimum zinc coating, with paint film thickness of 20 microns on weathering side. This product is designed to lower the surface temperature of buildings when used for roofing/wall applications and provides thermal comfort and energy savings.
Standards
Substrate
Galvanized steel, minimum G30(90 GSM).
Standards & 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, Cold Rooms etc.
Dimensions:
| Thickness* (mm) | Width** (mm) | Zinc coating (GSM) |
| 0.25 to 1.20 | 700 to 1300 | 90 (G30) minimum |
* 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)
Advantages:
- High Solar Reflection
- Reduces Steel Sheets’ Heat Absorption
- Reduces Heat Inside the Building
- Less Air-Conditioning Usage in Pre-Engineered Buildings
- Reduces Thermal Stresses and Extends Product’s Lifetime
- Allows using Dark Colors with Minimum Absorption of Heat
- Improves Thermal Comfort
| Pretreatment | Corrosion resistance proprietary conversion coating each side |
| Primer Coat | Universal Corrosion inhibitive Primer Nominal thickness 5µm each side |
| Finish Coat | Custom formulated system with Solar Reflective Pigments Nominal thickness 15 µm on the top or weather side. |
| Backing Coat | Polyester based custom formulated off white or Foam compatible epoxy coat Nominal thickness 5-7 µm. Back coat can be in the same topcoat color and DFT as required. |
| Gloss (60˚) | Medium Gloss. 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 |
| 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% |
Expected Product Service Performance
| Property | Test Method | Description | Results |
| Total Solar Reflectance | ASTM G159 | Solar Reflectance | TSR values for different colors: RAL 9005 – 33% RAL 7035 – 60% RAL 1015 – 51% |
