VFI®-711 Foam Roof Patch

VFI-711 Foam Roof Patch is a two-component, 4 PCF spray applied foam packaged in cartridges. Designed for use with the VFI-7500 Qwik Spray Gun, it is useful for repairing sections of damaged or missing foam on a roof. Difficult-to-repair areas can be quickly foamed without the need for a larger machine. Since VFI-711 has excellent adhesion, it can be used almost anywhere on a roof that requires foam repair.

VFI-711 Foam Roof Patch from VFI is a portable foam cartridge system for quickly repairing damaged or missing foam patches on a commercial roof.

Features & Benefits

  • Improved portability, as it doesn’t require a large plural component sprayer
  • Provides exceptional durability by creating a sealed, insulated surface once applied
  • Creates a smooth, quality finish that can be easily coated
  • Easy to apply for simple and fast repairs with the Qwik Spray System
  • Cartridges designed for use with VFI®-7500 Qwik Spray Gun

Instructions for Use:

Surface Preparation

Surface preparation will depend on the conditions of the substrate. Remove any surface contaminants detrimental to the adhesion of the foam patch. Use a broom to sweep dirt, dust, and debris. A power washer may be used on tougher stains.


VFI-711 Foam Roof Patch requires a plural component spray gun with dual 750 mL cylinders like the VFI-7500 Qwik Spray Gun. To use the gun, an air compressor that can provide a minimum of 100 PSI and 10 CFM of constant pressure is needed.

Mixing VFI-711 is only required if the material is visibly separated. If separation is visible, shake the cartridges until a uniform mix is achieved. The application temperature should be between 40°F – 100°F. Yield will decrease with temperatures lower than 70°F. Bring the material temperature to a minimum of 65°F before spraying. Apply the foam patch to all areas that are missing foam.


To clean residue on the Qwik Spray Gun, VFI recommends using xylene or MEK. Do not soak the gun in any 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 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-711 is not UV stable and has no long-term UV testing. It must be covered with a silicone or acrylic roof coating. Isocyanate in the A side may be irritating to skin and toxic if inhaled.

  • Incompatible materials – A side: oxidizers. B side: strong oxidizing agents, acids, and bases.
  • Conditions to avoid – heat and incompatible materials.
  • Chemical stability – stable under normal storage conditions.
  • Reactivity & hazardous reactions – The VFI-711 A side will react with water but otherwise there are no dangerous reactions known under normal use
  • Hazardous decomposition products – may include, and are not limited to, oxides of carbon.

Potential Health Hazards

  • May cause stomach distress, nausea, or vomiting if swallowed.
  • May cause skin irritation and sensitization: redness, edema, drying, defatting, or cracking.
  • May cause respiratory tract irritation, allergy or asthma symptoms, or breathing difficulties.
  • Causes serious eye irritation: discomfort, pain, excess blinking and tear production, with marked redness and swelling of the conjunctiva. B side components may also cause burns.

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

Application Methods:

  • Qwick Spray

Available Packaging:

  • Cartridge

Physical Properties

  • Solid Material Density: 4.0 PCF
  • Compressive Strength: 73 psi
  • Closed Cell Content: >90%
  • Permeance: <1 perm at 3 in
  • Thermal Resistance: 5.5
  • Response to Thermal And Humid Aging: 0.03

Liquid Properties

  • Liquid Density A Side: 10.25 lbs/gal
  • Liquid Density B Side: 8.58 lbs/gal
  • Mixed Liquid Density: 9.41 lbs/gal
  • Specific Gravity A Side: 1.23 g/ml
  • Specific Gravity B Side: 1.03 g/ml
  • Specific Gravity Mixed: 1.13 g/ml
  • Ratio by Volume (A:B): 1A:1B
  • Viscosity A Side: 110 cps
  • Viscosity B Side: 475 cps

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