VFI®-4385 82 D Form Coating Epoxy

VFI®-4385 82 D Form Coating Epoxy

VFI-4385 82 D Form Coating Epoxy is a coating with high rigidity and enough flexibility for casting concrete or other cementitious products over EPS, wood, and steel surfaces. An epoxy coating is an alternative to the VFI-2100 urethane molding rubber series or urethane form coatings like VFI-2538 70 D EPS Form Hard Coat. A low viscosity allows for easy mixing and application in 20 mil passes using a roller or brush. The coating will self-level, providing a uniform casting surface that can also be sanded to a desired finish.  

VFI-4385 Form Coating Epoxy is an 82 D coating with high rigidity and enough flexibility for casting concrete or other cementitious products over EPS, wood, and steel surfaces.

Features & Benefits

  • Flexible and will not crack or deform
  • Hard enough to be sanded for a uniform surface
  • Extended pot life allows for easy application with a roller
  • Not moisture sensitive and can go over damp surfaces
  • Adheres to EPS, wood, and steel

Instructions for Use:  

Surface Preparation  

For ensured adhesion, all surfaces must be clean and free of contaminants, including dirt, dust, and debris. Oil and grease must be removed by scrubbing with a cleaning detergent and rinsing with water.  

  • EPS – Ensure that EPS foam has been aged for at least 30 days. Foam between 1 and 3 PCF is acceptable, but for optimal cost-to-quality ratio, we recommend 2 PCF foam. Once clean and dry, VFI-4385 can be applied directly to the surface.  
  • Wood – The surface should be clean, relatively dry, and sanded for good mechanical adhesion.  
  • Steel – The surface must be cleaned by roughly sanding or sandblasting to SP6 to remove all rust, mill scale, dirt, and other contaminants.   


Before combining the A and B sides, premix the Hardener (B side) until a uniform mix is achieved. The Epoxy (A side) does not need to be premixed. Pour the measured B side into the measured A side and mix them until uniform. Transfer the mixture to a new container and mix again before use.  

VFI-4385 82 D Form Coating Epoxy can be applied by brush or roller at a minimum of 20 mil passes with a maximum thickness of about a quarter inch. For additional recoats, a good surface profile is required, so the cured coating must be sanded between each application. Always ensure the surface is clean, free of concrete dust, and dry before coating. 


Application equipment, such as rollers and brushes, can be cleaned with xylene, MEK, or a similar cleaning solvent.    


*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 approved safety glasses with side shields that are resistant to chemicals or tightly sealed/fitted splashproof chemical safety goggles and a face shield 
  • Hand protection – wear chemically resistant protective gloves (nitrile, butyl, or neoprene) 
  • Skin and body protection – wear impervious clothing as necessary to protect from skin contact 
  • Respiratory protection – in case of insufficient ventilation or when risk assessment shows air purifying respirators are appropriate, wear suitable full-face 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  

  • Incompatible materials – A side: strong oxidizers, acids, amines, and bases. B side: strong oxidizers and acids 
  • Conditions to avoid – A side: no data available. B side: strong oxidizers and keep away from heat, sparks, flame, and other ignition sources 
  • Chemical stability – stable under normal storage conditions 
  • Reactivity & hazardous reactions – no dangerous reactions known under normal use 
  • Hazardous decomposition products – A side: may include and are not limited to oxides of carbon. B side: hazardous decomposition products should not be produced under normal conditions of storage and use. Under combustible conditions, products of combustion may include and are not limited to oxides of carbon and oxides of nitrogen 

Potential Health Hazards  

  • A side may cause respiratory irritation. B side may cause respiratory sensitization and burns.  
  • Both sides may cause stomach distress, nausea, and vomiting if swallowed. B side is toxic and may cause burns.  
  • A side causes skin irritation and sensitization: redness, edema, drying, defatting, and cracking. B side is toxic when in contact with skin and causes severe burns, redness, pain, and blisters. Repeated exposure to the material can result in absorption through skin, causing a significant health hazard.  
  • Both sides cause serious eye irritation or damage: discomfort, pain, excess blinking and tear production, marked redness, and swelling of the conjunctiva. B side may also cause burns.  

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

Application Methods:

  • Chip Brush Chip Brush
  • Roll Roll

Available Packaging:

  • 5 Gallon
  • 2 Gallon
  • 1 Gallon