VFI®-5011 80 A Expansion Joint Filler

VFI®-5011 80 A Expansion Joint Filler

VFI-5011 80 A Expansion Joint Filler is a two-part, self-leveling polyurea hybrid material used to fill and protect interior control joints or new construction saw joints in industrial floors. The joint filler has strong elastomeric properties that ensure joints stay sealed when concrete expands or contracts due to temperature changes. Polyurea hybrid joint fillers also protect concrete joint edges from deteriorating due to high traffic and heavy loads. A fast cure time decreases downtime, allowing you to trim the material to be flush with the surface quickly after application. VFI-5011 is a versatile material that can also be used to patch and repair cracks or joints.

Two-part 80 A polyurea joint filler ideal for expansion joints and provides elastomeric properties to keep the joint sealed.

Features & Benefits

  • Rapid curing for decreased downtime during installation
  • Excellent abrasion and chemical resistance in high traffic areas
  • 1:1 mix ratio by volume for easy application
  • Prevents water, dirt, and other contaminants from causing deterioration
  • Allows concrete to expand and contract without cracking or breaking

Instructions for Use:

Surface Preparation

Joint filler separation can be avoided by delaying the application of the joint filler as long as possible after new concrete has been poured so it has time to shrink and cure. New concrete slabs should be allowed to cure for at least 28 days before installing the joint filler. All joints must be cleaned, prepped, and free of oils, dirt, loose particles, or other contaminants that might affect adhesion. Clean concrete where necessary by grinding, sandblasting, or wire brushing. For optimal results, re-cut joints with a dry diamond blade.

All surfaces should be structurally sound and dry (less than 5% moisture). If the area to be filled is wet or damp, the joints must be primed and allowed to set. If joints in the concrete have been filled previously, remove all old joint sealing materials. Priming may be required if the previous filler or sealant is not saw-cut from the joint.


The temperature of the work area and surface should be between 50°F – 100°F during application, and the material should be at least 65°F. Using the material at higher temperatures or with larger quantities will shorten the pot life. You must premix the B side (Poly) until uniform before combining it with the A side (Iso). Mix times will vary depending on the volume of material used and the mixing method. When using cartridges, mixing is not required unless the material is visibly separated. Shake the cartridges until uniform if separation occurs.

VFI-5011 can be dispensed using a dual cartridge static mix gun or a low-pressure, plural component machine pump. When purchased as the Qwik Spray System, VFI recommends the plural component, pneumatically driven VFI-7500 Qwik Spray Gun. An air compressor that can provide 100 psi and 10 CFM of constant pressure is also required. Keep the cartridge upright when loading it into the applicator gun. Dispense initial material away from the joint to ensure the material is fully mixed.

Note: Application with the Qwik Spray System must be performed continuously. Stopping before the cartridge is fully dispensed will result in the material setting up in the mixing nozzle.

When weight is not an issue, closed cell backer rods may be installed at a depth of 1”-1 ¼”. If you plan on exposing the joints to heavy loads, the joint filler should be applied at full depth. Coverage will depend on the size of the joints. VFI-5011 cartridges, when used with a backer rod, will cover 17’ of ¼” wide control joints. The recommended method of application is to fill the joint from bottom to top. Overfill the joint by up to 5%, so you can cut excess material away to be flush with the surface. Allow the filler to set for approximately 45 minutes before using a sharp wall scraper or stiff, sharp razor blade to shave off excess material. Applying lightweight oil to the blade will allow for easier shaving.


We recommend using xylene or MEK as a cleaning solvent. Wipe excess material from the surface and application tools before it cures. If the material cures, a sharp wall scraper can be used to remove it. When using the Qwik Spray Gun, remove the cartridges from the applicator frame and throw them away. Do not soak the gun in any 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 and any additional eye protection as necessary
  • Hand protection – wear chemically resistant protective gloves (nitrile, butyl, or neoprene)
  • 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

This product contains isocyanate, which may irritate the skin and is toxic if inhaled as particulate matter. Avoid prolonged breathing of vapors and repeated skin contact. It is not intended for exterior or interior joints that are subject to high movement from thermocycling. As a moisture-sensitive product, joints must be dry or wet and damp areas must be primed. VFI-5011 is not UV color stable and has no long-term UV testing.

  • Incompatible materials – strong oxidizers
  • Conditions to avoid – 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, and are not limited to, oxides of carbon

Potential Health Hazards

  • May cause respiratory tract irritation. A side material may also cause allergy and asthma symptoms or breathing difficulties if inhaled.
  • Causes skin irritation or sensitization: redness, edema, drying, defatting, and cracking of the skin.
  • Causes serious eye irritation: discomfort, pain, excess blinking and tear production, marked redness, and swelling of the conjunctiva.
  • 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:

  • Inject Inject

Available Packaging:

  • Tote
  • Drum
  • 5 Gallon
  • Cartridge