VFI®-2839 95 A Aliphatic Spray Coating

VFI®-2839 95 A Aliphatic Spray Coating

VFI-2839 95 A Aliphatic Spray Coating is a fast-setting, two-part polyurea rubber that is best applied by spray as an encapsulant material to protect edges on smaller pieces like table edging. It has excellent physical properties such as color stability, moisture insensitivity, and durability for versatile applications in indoor and outdoor environments. Good chemical and solvent resistance allow the material to withstand harsh environments and climate changes.

VFI-2839 95 A Aliphatic Casting Rubber from VFI is a sprayable polyurea rubber for creating large, flexible molds and lightweight castings.

Features & Benefits

  • Completely UV stable for outdoor and indoor use
  • Smooth finish with great flexibility
  • Offers easy, fast-setting spray application
  • 100% solids and 0 VOCs

Instructions for Use:

Surface Preparation

Ensure all surfaces are properly prepared before spraying or injecting the material. Surfaces must be clean and free of contaminants such as dirt, dust, or debris. A release agent must be used on all products intended for demolding to prevent unwanted adhesion and extend the life of the molding surface. When enhanced adhesion is needed, use VFI-#11 on cementitious and masonry surfaces. Steel should be white blasted per SSPC-SP10 to remove all dust, coating, and mill scale. Sandblast or shot blast all concrete surfaces to achieve a profile equal to 80-100 grit sandpaper.

Application Process

Premix the B side (Poly) until uniform before use. Mix times may vary based on volume and mixing method. VFI-2839 must be brought to a minimum of 65°F for proper mixing and application. When spraying, it requires heated, airless plural component spray equipment capable of producing a minimum spray pressure of 2,000 psi and heat between 140°F-160°F. Spraying at higher pressures, between 2,000-3,000 psi, may provide better mixing and optimal physical properties. It can also be used in an injection molding system.

The sprayable rubber should be applied in layers at least 40 mils thick, but applications of 80 mils or more will produce the most optimal results. Allow the first coat to become tacky before applying additional coats and stay within the 20-minute recoat window. If the coating fully cures between coats, it may cause delamination.


The preferred cleanup solvent is xylene or MEK. When flushing out spray lines, we recommend using VFI-8005 Pump Flush to fully clean out the lines.


*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, fitted dust or splash-proof chemical safety goggles and face protection such as a face shield
  • 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-2839 contains aliphatic isocyanate, which can irritate the skin and is toxic if inhaled as particulate matter. Avoid prolonged breathing of vapors and repeated skin contact by utilizing proper PPE. Protect the material from moisture exposure, as water will cause the A side (Iso) material to generate carbon dioxide, resulting in high pressure in closed containers. It should also be protected from freezing and kept above 60°F.

  • Incompatible materials – A side: amines, strong bases, water, alcohols, and heavy metals. B side: acids
  • Conditions to avoid – A side: contamination occurs with water. Keep away from heat, ignition sources, and incompatible materials. B side: heat and incompatible materials
  • Chemical stability – stable under normal storage conditions
  • Reactivity & hazardous reactions – no dangerous reaction known under normal use
  • Hazardous decomposition products – may include but are not limited to oxides of carbon and oxides of nitrogen as well as isocyanates for the A side

Potential Health Hazards

  • Material on both sides may cause respiratory tract irritation if inhaled. A side material may cause allergy and asthma symptoms or breathing difficulties. B side material may cause burns.
  • Causes skin irritation and sensitization: redness, edema, drying, defatting, and cracking of the skin. B side material is toxic in contact with the skin and causes severe skin burns.
  • Causes serious eye irritation or damage: discomfort, pain, excess blinking and tear production, marked redness, and swelling of the conjunctiva. B side material may also cause burns.
  • May cause stomach distress, nausea, or vomiting if swallowed.

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

Application Methods:

  • Spray Spray
  • Inject Inject

Available Packaging:

  • Tote
  • Drum
  • 5 Gallon