VFI-6170 70 D Spray Hard Coat

Thickness Requirements

Apply an average of 40-80 mils to the surface to create a uniform film that protects the piece. If the finished piece is to be placed on the ground or in a high-traffic area, then extra coating at a rate between 60-120 mils is required to increase impact resistance. If more coats are needed, apply them within the 20-minute recoat window. Adhesion issues may occur if you are coating past the 20-minute mark but applying a primer can help generate adhesion.

Equipment

VFI’s recommended specifications for a high-pressure, plural component spray rig is to run it at 150°F-155°F and 2,500 psi of constant pressure with high-pressure heated hoses and 10 ft whip hoses. Gun tips will vary by the project and will need to be adjusted on site. The following machines are capable of meeting these specifications:

• Graco A-XP1 air sprayer provides up to 3,500 psi of constant pressure and 170°F with a 1.5 gal/min output and 210 ft hoses. Use with any Probler P2 or Fusion gun.
• Graco Reactor 2 E-XP2 electric sprayer provides up to 3,500 psi of constant pressure and 190°F with a 2 gal/min output and 310 ft hoses. Use with any Probler P2 or Fusion gun.
• Graco Reactor 2 H-XP2/XP3 hydraulic sprayers provide up to 3,500 psi of constant pressure and 190°F with 1.5 or 2.8 gal/min outputs and 310 or 410 ft hoses. Use with any Probler P2 or Fusion gun.
• PMC PHX-2 or 25 hydraulic sprayers, ideal for small or medium-scale applications, provide up to 3,000 psi of constant pressure and 190°F with outputs just under 2 gal/min and 210-410 ft hoses. Use with the AP-2 Air Purge, PX-7 Mechanical Purge, or Xtreme Spray Gun.

Surface Preparation

• EPS – The foam must be aged for at least 30 days so any gas can escape. We recommend using non-recycled EPS bead 2 PCF foam for an optimal cost-to-quality ratio, but 1-3 PCF is acceptable. Ensure that the surface is clean and dry before you begin spraying.
• Wood – The wood should be dry and contain less than 11% moisture; otherwise, it should be primed or mist-coated (a light dusting followed by the main application of the coating).

Mixing

Bring VFI-6170 to a minimum temperature of 65°F and premix the Poly (B side) components before use. The time it takes to mix the product until it is uniform will depend on the mixing method and the volume of the product. The A side does not need to be premixed.

Post Cure

Once cured, VFI-6170 must be top coated with paint or an equivalent coating for protection from UV rays. The object can be moved within the first hour of spraying but requires extra care until full cure, which could take up to 3 days.

Cleanup

After application, clean your tools and spray equipment with xylene or MEK. We recommend flushing VFI-8005 Pump Flush through spray lines to prevent material from clogging the equipment.

Storage/Shelf Life

The material shelf life is 12 months from the date of manufacture. Store in a dry, temperature-controlled space in unopened containers between 60°F – 90°F. Once open, use it immediately and reseal containers with a nitrogen purge. Moisture contamination can occur in both sides if you don’t nitrogen purge the material. Moisture may create a hardened film over and in the A side (Iso). If there is moisture contamination within the B side (Poly), it will cause pinholes and foaming once mixed and sprayed. VFI-8403 Dryer can be used to reduce undesired effects in the B side.

Precautions

VFI-6170 is not a UV color-stable product and has no long-term UV testing. This product contains isocyanate, which can be irritating to the skin and toxic if inhaled. Avoid prolonged breathing or skin contact. Make sure the surface and ambient temperatures stay between 40°F – 100°F. Avoid prolonged breathing of vapors and repeated skin contact. When spraying, use a supplied air respirator or respirator with forced air ventilation in a chemically approved spray booth. Do not thin or add foreign material to the product. See the Safety Date Sheet for all safety information.