VFI®-640-1 Gray Acrylic Coating

VFI-640-1 Gray Acrylic Coating is a single-component, fluid-applied, elastomeric roof coating commonly used as a base coat. As a water-based product, no hazardous chemicals are used when cleaning equipment and it only needs a standard acrylic sprayer for easy application. When applied as a base coat in a commercial roof restoration system, it works with an acrylic top coat to build film thickness, protecting the substrate from impacts, UV radiation, and weathering. 

VFI-640-1 Gray Acrylic Coating from VFI is an elastomeric base coat used with an acrylic topcoat for commercial roof restoration system.

Features & Benefits

  • Identifiable color – for easy detection of where more coverage is needed when applying a top coat
  • Quicker cure time – darker color helps the coating cure faster for quick and easy top coat application
  • Better impact resistance – holds up against physical wear and tear
  • Better durability – withstands extreme weather conditions and UV rays, helping to extend the life of the roof
  • Excellent adhesion – improves the bond of the topcoat layer to the substrate
  • Low VOCs – exceeds EPA standards for VOCs

Instructions for Use:  

Surface Preparation  

Detailed surface preparation will depend on the substrate being coated and the application method. Using a broom, clean the entire substrate of dirt and debris that may affect adhesion. Power wash the surface as needed, and use a roof cleaning detergent to scrub areas with grease, oil, and animal fats. Rinse the roof of all cleaning agents and allow it to dry before proceeding with roof restoration.  

Make necessary repairs to the roof’s structural components. Gaps and seams should be tight and flush. Eliminate gaps and deflections bigger than ¼” with additional screws or rivets. Loose or backed-out fasteners must be tightened or replaced with oversized fasteners.  


VFI always recommends the use of a primer (VFI-#11 9:1 Epoxy Primer) for improved adhesion. A multicoat method using VFI-605-1 White Acrylic Coating as a top coat is also recommended after applying VFI-640-1 as a base coat. The VFI-605-1 topcoat should be applied at a minimum rate of 1 gallon per square over the base coat.  

VFI-640-1 White Acrylic Coating can be applied to the surface with a sprayer, roller, or brush. The temperature must be between 50°F – 120°F during application for proper adhesion. Apply the maintenance base coat at a minimum rate of 1.25 gallons per. After topcoat application, coverage rate should total a minimum of 2.25 gallons per square. Check specifications for required wet and dry film thickness. The top coat should be applied within 48 hours of base coat application. Ensure that the base coat has fully cured before applying the top coat.  

*Roofs with a slope less than or equal to 1/12 should be fully reinforced with polyester fabric.  


All application tools, including spray equipment, brushes, rollers, etc., can be cleaned with water. If the material has cured on or in equipment, use mineral spirits.  


*Always read the safety data sheet before working with chemicals 

Use chemicals only as directed and for their intended purpose. Do not dispose of chemicals down the drain. Most chemicals must be disposed of as hazardous waste.  

PPE to avoid all unnecessary exposure:  

  • Eye protection – wear safety glasses and any additional eye protection as necessary
  • Hand protection – wear chemically resistant protective gloves (nitrile, butyl, or neoprene)
  • Skin and body protection – wear suitable protective clothing
  • Respiratory protection – in case of insufficient ventilation, wear suitable respiratory equipment. Respirator selection must be based on known or anticipated exposure levels, the hazards of the product, and the safe working limits of the selected respirator

Product Limitations  

VFI-640-1 Gray Acrylic Coating must be protected from freezing. The temperature must remain above 40°F until the coating has fully cured for ensured adhesion. Rain and moisture will negatively affect adhesion, so stop application if either is present. VFI-640-1 is not recommended on flat roofs or where ponding water is present.  

  • Incompatible materials – none known
  • Conditions to avoid – heat
  • Chemical stability – stable under normal storage conditions
  • Reactivity & hazardous reactions – no dangerous reaction known under normal use
  • Hazardous decomposition products – may include, and are not limited to, oxides of carbon

Potential Health Hazards  

  • May cause respiratory tract irritation. 
  • May cause stomach distress, nausea, or vomiting if swallowed.  
  • May cause skin irritation or sensitization: redness, drying, defatting, or cracking of the skin.  
  • May cause eye irritation: discomfort, pain, redness, swelling, excess blinking & tear production.  

*If you are experiencing any of these symptoms, seek medical assistance or attention. Call a poison control center or doctor if swallowed.  

Application Methods:

  • Spray
  • Brush
  • Roll

Available Packaging:

  • Tote
  • Drum
  • 5 Gallon