1. PRODUCT NAME
ACRYSHIELD® A420
Elastomeric Roof Coating
2. MANUFACTURER
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NATIONAL COATINGS CORPORATION
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1201 Calle Suerte Camarillo, CA 93012
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| Phone: |
800-423-9557 |
| FAX: |
800-294-3866 |
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www.nationalcoatings.com
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3. PRODUCT DESCRIPTION
ACRYSHIELD A420 is a multi-purpose, acrylic, elastomeric coating for use over a variety of substrates including asphalt and metal roofing. A420 has unique “bleed blocking” properties that make it particularly suited for coating over asphalt surfaces. A420 far exceeds the ASTM D6083 requirements for critical properties such as tensile strength, elongation, wet adhesion and weatherability.
4. TECHNICAL DATA
See Table on reverse side.
5. INSTALLATION
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May be applied by spray, brush, or roller.
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All surfaces must be clean, dry, and free of dirt, grease, oil, or other contaminants that would interfere with proper adhesion.
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Apply at temperatures above 50ºF.
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Apply only when weather conditions will permit drying before rain, dew or freezing temperatures.
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Cool temperatures and high humidity retard cure.
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Yield=7.2 DFT/gallon.
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For application details see specific Guide Specifications.
6. AVAILABILITY AND COST
AcryShield A420 may be purchased directly from National Coatings Corporation. For information call 800-423-9557.
7. WARRANTY
Various warranties are available for specific ACRYSHIELD RESTORATION SYSTEMS and ACRYPLY® ROOFING SYSTEMS installed by approved applicators. Periodic maintenance of ACRYSHIELD RESTORATION SYSTEMS and ACRYPLY ROOFING SYSTEMS ensures extended performance and reduces life cycle costs.
8. MAINTENANCE
Periodic maintenance of ACRYSHIELD RESTORATION SYSTEMS and ACRYPLY ROOFING SYSTEMS ensures extended performance and reduces life cycle costs.
9. TECHNICAL SERVICES
Additional information, product brochures, and guide specifications are available. Roof energy evaluations, life cycle cost analyses, and other roof management services are also available from a National Coatings Technical Consultant.
10. FILING SERVICES
Additional product information is available from National Coatings Corporation.
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ACRYSHIELD® A420
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ASTM D6083 Technical Data
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Property
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Requirement
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Result
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| Initial Tensile Strength (psi) |
200 Minimum |
> 250 |
| Initial Elongation (%) |
100 Minimum |
> 250 |
| Dry Adhesion (pli)* |
No Reference |
> 6.0 |
| Wet Adhesion (pli)* |
2 Minimum |
> 4.5 |
| Tear Resistance (lbf / in) |
> 60 |
>100 |
| 1000-hr Accelerated Weathering |
No Cracking or Checking |
No Cracking or Checking |
| Elongation After Accelerated Weathering (%) |
100 Minimum |
> 200 |
| Permeance (perms) |
50 Maximum |
< 15 |
| Fungi Resistance (Zero = No Growth) |
Zero Rating |
Zero Rating |
| Volume Solids (%) |
> 50 |
45 ± 2 |
| Weight Solids (%) |
> 60 |
60 ± 2 |
| Viscosity (KU) |
85-141 |
110 ± 10 |
| *Measured Over Aged PVC Substrate |
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Cool Roof Data
(Product tested in white color)
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Property
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Method
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Result
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| Initial Solar Reflectance |
ASTM C1549 |
.83 |
| Thermal Emittance |
ASTM E408 |
.94 |
ACRYSHIELD A420 is for industrial/commercial applications only. These suggestions and data are based on information we believe to be reliable. They are offered in good faith, but without guarantee, as conditions and methods of use are beyond our control.