Product Data Sheet - AcryShield® A640
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1. PRODUCT NAME
ACRYSHIELD® A640
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 A640 is a unique, fast- setting, multi-purpose, acrylic, elastomeric coating for use over a variety of substrates including asphalt and metal roofing. A640 provides resistance to early wash-off associated with heavy dew and light rain.
A640 has unique “bleed blocking” properties that make it particularly suited for coating over asphalt surfaces, and exceeds several ASTM D6083 requirements for critical properties such as tensile strength, elongation, wet adhesion and weatherability.
| BENEFITS: | APPROVALS: | |
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UL 790 Class A Rating  ICC-ES ESR-2140 This product, in white, meets the Energy Star® guidelines for reflectivity.
CRRC Rated 
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4. TECHNICAL DATA
See table below.
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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For application details see specific Guide Specifications.
6. STORAGE
Store materials between 40ºF and 100ºF to prevent damage to products. Do not store at high temperatures or direct sunlight. Protect all materials from freezing during transit, handling, storage, and installation. Shelf life of 24 months if unopened containers stored between 40°F and 90°F and out of direct sunlight.
7. AVAILABILITY AND COST
AcryShield A640 may be purchased directly from National Coatings Corporation. For information call
800-423-9557.
8. WARRANTY
Various warranties are available for specific ACRYSHIELD ROOF MANAGEMENT SYSTEMS and ACRYPLY® ROOFING SYSTEMS installed by approved applicators.
9. MAINTENANCE
Periodic maintenance of ACRYSHIELD ROOF MANAGEMENT SYSTEMS and ACRYPLY ROOFING SYSTEMS ensures extended performance and reduces life cycle costs.
10. 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.
11. FILING SERVICES
Additional product information is available from National Coatings Corporation.
ACRYSHIELD® A640 |
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ASTM D6083 Technical Data
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Property |
Requirement |
Typical Results |
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Initial Tensile Strength (psi) |
200 Minimum |
275 |
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Initial Elongation (%) |
100 Minimum |
265 |
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Dry Adhesion (pli)* |
No Reference |
6.5 |
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Wet Adhesion (pli)* |
2 Minimum |
5.0 |
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Tear Resistance (lbf / in) |
> 60 |
100 |
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1000-hr Accelerated Weathering |
No Cracking or Checking |
No Cracking or Checking |
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Elongation After Accelerated Weathering (%) |
100 Minimum |
220 |
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Permeance (perms) |
50 Maximum |
12 |
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Water Swelling (%) |
20 Maximum |
15 |
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Fungi Resistance (Zero = No Growth) |
Zero Rating |
Zero Rating |
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Volume Solids (%) |
> 50 |
52± 2 |
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Weight Solids (%) |
> 60 |
66± 2 |
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Viscosity (KU) |
85-141 |
110 ± 10 |
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* Measured Over Aged PVC Substrate |
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Cool Roof Data |
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AcryShield A640 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.