Product Data Sheet - AcryShield® A640

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1. PRODUCT NAME

ACRYSHIELD® A640
Elastomeric Roof Coating

2. MANUFACTURER

NATIONAL COATINGS CORPORATION

1201 Calle Suerte Camarillo, CA 93012

Phone: 800-423-9557
FAX: 800-294-3866
www.nationalcoatings.com

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:
  • Seamless Waterproofing
  • Fully-Adhered Installation
  • Asphalt Bleed Blocking
  • acrylic Durability
  • Energy Savings
  • Prolonged Roof Life
  • Reduced Life Cycle Costs
  • Renewable

UL 790 Class A Rating

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ICC-ES ESR-2140

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This product, in white, meets the Energy Star® guidelines for reflectivity.

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CRRC Rated
- Product ID 0626-0011 (White)
- Product ID 0626-0030 (Light Grey)

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California Title 24 

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4. TECHNICAL DATA

See table below.

5. INSTALLATION

  • May be applied by spray, brush, or roller.

  • All surfaces must be clean, dry, and free of dirt, grease, oil, or other contaminants that would interfere with proper adhesion.

  • Apply at temperatures above 50ºF.

  • Apply only when weather conditions will permit drying before rain, dew or freezing temperatures.

  • Cool temperatures and high humidity retard cure.

  • 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.

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

ASTM D6083 Technical Data

Property

Requirement

Typical Results

Initial Tensile Strength (psi)

200 Minimum

275

Initial Elongation (%)

100 Minimum

265

Dry Adhesion (pli)*

No Reference

6.5

Wet Adhesion (pli)*

2 Minimum

5.0

Tear Resistance (lbf / in)

> 60

100

1000-hr Accelerated Weathering

No Cracking or Checking

No Cracking or Checking

Elongation After Accelerated Weathering (%)

100 Minimum

220

Permeance (perms)

50 Maximum

12

Water Swelling (%)

20 Maximum

15

Fungi Resistance (Zero = No Growth)

Zero Rating

Zero Rating

Volume Solids (%)

> 50

52± 2

Weight Solids (%)

> 60

66± 2

Viscosity (KU)

85-141

110 ± 10

* Measured Over Aged PVC Substrate

 

Cool Roof Data

Bright White

Method

Initial

Aged

Solar Reflectance

ASTM C1549

.83

.77

Thermal Emittance

ASTM C1371

.94

.92

SRI

Calculated

105

96

Light Grey

Method

Initial

Aged

Solar Reflectance

ASTM C1549

.72

.70*

Thermal Emittance

ASTM C1371

.90

.90*

SRI

Calculated

89

86*

*CRRC Rapid Ratings: These are interim laboratory-aged values that simulate weathered values. These values will be replaced with the measured three-year aged values upon completion of the weathering process. SRI values calculated using Rapid Ratings may change once the aged rating replaces the interim rating.

 

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.