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Application Guide

Before you begin:

✅Weather is dry (no rain forecast for the next 2 hours)

✅Concrete is dry and swept or blown clean of loose debris (broom, leaf blower, etc.)

✅Temperature is above 50°F (10°C)

✅PPE is available (gloves, safety glasses, high-visibility gear, close-toed shoes)

✅OptiSeal is shaken or mixed thoroughly before application

  • 15 minutes for 275-gallon totes
  • 7-8 minutes for 55-gallon drums
  • 1-2 minutes for 5-gallon pails and 1-gallon jugs
  • 30 seconds for 1-quart bottles

✅OptiSeal application rate is set at 1 gallon per 180 sq ft

✅Supporting Products: BST Cleaner and MG Degreaser (with clean water)

✅Traffic control plan in place (cones, flaggers, signage as needed) and caution is practiced around vehicles and pedestrians for concrete pavement applications

Method 1: Backpack or Handpump Sprayer

What You Need:

  • A clean backpack or handpump sprayer with a fan-tip or cone-tip nozzle
  • OptiSeal product, measured volume appropriate for the project

Steps:

  1. Site Prep: Sweep or blow off all loose debris. Blot the surface using a towel to make sure the concrete surface is dry.
  2. Concrete Temperature: Use a temperature gun to gauge the surface and make sure it is above 50°F
  3. Fill sprayer: Mix OptiSeal thoroughly in the product container. Pour the mixed OptiSeal into the backpack or handpump sprayer tank. Prime the spray applicator as recommended by the manufacturer. 
  4. Spray Application: Walk at a steady pace, spraying side to side in smooth, even passes. For vertical applications, move wand in a steady pace up-and-down or side-to-side.
  5. Overlap: Slightly overlap the spray pattern to avoid streaking or missed sections. 
  6. Watch for puddling: Use a broom or roller on horizontal applications to spread out excess product if needed. 
  7. Return any unused product back to the manufacturer's container and seal tightly. 

💡 Use backpack or pump sprayer for irregular areas, exterior and interior spaces, and vertical or horizontal applications. BioSpan's vehicle-mounted Spray System also includes a spray wand and hose to reach irregular exterior areas.

Method 2: Spray System (Flatbed Truck or Compact Unit)

What You Need:

  • A clean BioSpan Spray System (flatbed or compact units), calibrated appropriately
  • OptiSeal bulk product in 275-gallon totes (for the flatbed system) or 80-100 gallons (for the compact system)

Steps:

  1. Site Prep: Sweep or blow off all loose debris. Blot the surface using a towel to make sure the surface is dry.
  2. Concrete Temperature: Use a temperature gun to gauge the surface and make sure it is above 50°F
  3. Prepare the spray system: Ensure pump, hoses, and spray bars are clean and functioning. Make sure fittings and clamps are tight and sealed. Ensure that all appropriate valves are open/closed before running the system.
  4. Prep OptiSeal: Mix OptiSeal thoroughly (for 15 minutes within the tote) before use. 
  5. Calibrate flow rate: Target rate is 1 gal per 180 sq ft (0.05 gallons per sq yd). Adjust vehicle speed and pressure accordingly. May slowly close the product return / recirculation valve to adjust pressure.
  6. Application: Switch on the appropriate spray booms from the cab control system. Once the vehicle is in motion, switch on the Master control to start spraying. 
  7. Avoid stopping mid-pass to prevent streaking or over-application.
  8. May use wand and hose extension to reach vertical applications such as nearby bridge deck sides/walls. 
  9. Post-Application: Once the spray line has been switched off and the vehicle is parked, close off the valve to the OptiSeal product container and make sure the top is sealed tightly for storage.

💡 Use a cone truck or follow vehicle with arrow board for safety on roads or in lots.

Cleanup & Aftercare

  • Flush all spray equipment clean of OptiSeal residue. 
  • Flush BST Cleaner through the spray system to clear nozzles, hoses, pumps, and tanks. 
  • After BST, flush the spray equipment using a more concentrated MG Degreaser solution by diluting with less water (within the recommended range).
  • Clean tools and equipment immediately after use. May use BST Cleaner or diluted MG Degreaser for exterior sprayer surface cleaning
  • Avoid rain or irrigation for at least 2 hours after OptiSeal cure. 
  • OptiSeal Cure: Wait 8 hours for OptiSeal to fully cure. Treated concrete surfaces may dry to the touch earlier. 

Need Help?

📞 Contact BioSpan support or scan your QR code on the label for how-to videos and tech support.

🌐 Visit biospantech.com for specs, SDS, and more.