Polyester Aluminum Specifications

Nothing will affect the appearance of your home more dramatically than the exterior products you choose.

Aluminum Soffit, Fascia, & Rainware Material Specifications


EMCO aluminum products shall be made from 3105 or equivalent aluminum alloy and H-26, H-28 or equivalent hardness. Aluminum is a building product grade, tension leveled coil stock, specifically produced to be roll-formed in a consistent manner. All aluminum used for coating is produced in accordance to the Aluminum standards and data 2006 edition. The ASTM standards have been approved for use by government agencies. 16" center vent soffit panels have a minimum calculated ventilated area (NFOA) of 6.6 square inches per lineal foot.


0.019" nominal - soffit, rainware, trim coil, and accessories
0.032" nominal - gutter coil
Note: Meets performance requirements of AAMA 1402-96

Aluminum Soffit, Fascia, & Rainware Paint Specifications

System Overview

The Supra HD SMP coil coating system is manufactured and distributed globally by Continental Coatings Inc. and Yung Chi Paint and Varnish Manufacturing Company Ltd. is a silicone-modified polyester high-durability coil coating system engineered for high-end metal building product applications and challenging exterior environments that require long life and extended warranty coverage. Supra HD system is formulated with a proprietary state-of-the-art polyester resin and silicone polymer system, which is significantly more resistant to UV-radiation and natural weathering than traditional polyester paints. Supra HD uses high-quality, long-lasting organic, ceramic, and metallic pigmentation to ensure excellent exterior color fastness and coating service life. This system is also available in multiple coats and various specialty high-build systems for custom projects and perforated applications. Supra HD may be applied Single Coat or over the Universal PU-11 High Molecular Weight Urethane Primer or PU-30 High-Build Urethane Primer Systems for extreme environment warranted building product applications.

Application Parameters

Supra HD system is designed for trouble-free, high-line speed coil coating line application. It has been run worldwide under a very wide range of application parameters and substrate conditions. Standard topcoat DFT is .60-.80 mils, which allows for optimal application consistency, color stability, and exterior performance. Supra HD was formulated to provide improved stain resistance and cleanability, as well as scratch resistance and surface toughness, while maintaining the good system flexibility required for long-term bend line corrosion performance. Supra HD paint film is extra tough and can handle difficult roll-forming, panel stacking, and transport conditions. Superior primer corrosion resistance and substrate adhesion provide significantly enhanced protection against wet stack storage problems, cut edge, and scratch corrosion.

Commercial Uses

Supra HD system can be formulated in standard, medium, textured, and low gloss/low sheen finishes and supplied in a wide range but with limited color palettes. This premium coating supports an extended warranty and can be applied to a variety of adequately cleaned and treated metal substrates including: Hot Dipped Galvanized, ZnAl, Galfan®, ZAM®, and Aluminum. Supra HD can be formulated with COOL ROOF ceramic pigment technology and can be formulated to exceed ENERGY STAR® requirements. It is ideal for metal wall panels, industrial and agricultural metal building components, premium rainware, commercial and residential metal roofing, and pre-engineered metal building system applications.

supra HD™ premium high durability coil coating system - silicone modified polyester
Specifications Test Result
Application Method N/A Reverse Roll Coat
Primer N/A Single Coat, PU11 HMW PU, PU30 High-Build PU
Substrate N/A Aluminum, HDG, Galvalume®, ZAM®
Pretreatment Standard Clean and Treat Chrome, Zinc Phosphate, or Approved Non-Chrome
ASTM D 4138 Dry Film Thickness Top Coat: 0.6 to 0.8 mils • Primer: 0.15 to 0.3 mils
Total System: 0.60 to 1.10 mils
ASTM D 4212 Viscosity (No. 4 Zahn Cup) 25 to 35 seconds
ASTM D 1475 Weight Per Gallon 9.0 to 12.0 lbs Per Gallon
ASTM D 2697 Solids Per Volume 50 to 55%
ASTM D 2369 Solids Per Weight 60 to 75%
Reducing Thinner Reducing Solvent Aromatic
ASTM D 3960 VOC (Theoretical) 3.0 to 4.0 lbs Per Gallon
Clean-up Solvent N/A Aromatic/Ketone
Coating Mileage N/A 1069 to 1176 sq ft Per Gallon
Peak Metal Temperature N/A 435 F to 450 F

Technical Data
Specifications Test Result
ASTM D 523 Specular Gloss at 60 6 to 85
ASTM D 3363 Pencil Hardness H TO 3H
ASTM D 4145 T-Bend 0T to 2T with No Loss of Adhesion
ASTM D 5402 Solvent Resistance (MEK Rubs) 100 +
ASTM D 3359 Cross Hatch Adhesion No Loss of Adhesion
ASTM D 2794 Reverse Impact Galvalume or HDG: 3x Metal Thickness Inch-Lbs, No Loss of Adhesion
Aluminum: 1.5x Metal Thickness Inch-Lbs, No Loss of Adhesion
ASTM B 117 Salt Spray Resistance 1,000 hrs
Salt Spray Resistance 2,000 hrs
Galvalume or HDG: Creep from Scribe < 1/8 in. (3 mm), None or Few #8 Blisters
Aluminum: Creep from Scribe <1/8 in. (3 mm), Few #8 Blisters
ASTM D 2244
ASTM D 4214
South Florida Exposure Color: No More than 5 (E) Hunter Units at 90 Vertical Angle and 7 (E) Units Non-Vertical
Chalk: Rating No Less than 8 at 90 Angle and 6 at Non-Vertical Angle
Film Integrity: 25 Years, No Blisters, Peeling or Cracking
ASTM D 870 Water Immersion 100 F 168 hrs No Field Blisters with Minimal Color Change
ASTM D 1308 Chemical Resistance (15 mins) No Significant Color Change (Color Dependent)
ASTM E 84 Flame Spread Classification Class I or A
ASTM D 968 Abrasion Resistance Total Sand = 35 +/- 5 liters (Dft Dependent)
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