
Application Guide
Before you begin:
✅Weather is dry (no rain forecast for the next 2 hours)
✅Asphalt pavement and seams are 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)
✅SeamSeal 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
✅SeamSeal application rate is set at 1 gallon per 300 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
Method 1: Backpack or Handpump Sprayer
What You Need:
- A clean backpack or handpump sprayer with a fan-tip or cone-tip nozzle
- SeamSeal product, measured volume appropriate for the project
- Masking shields or spray boards as desired for narrow band application

Steps:
- Site Prep: Clear any target seams or cracks of loose debris using compressed air or leaf blower. Sweep or blow the adjacent surface clean of debris. Blot the surface using a towel to make sure the surface is dry.
- Pavement Temperature: Use a temperature gun to gauge the surface and make sure it is above 50°F
- Fill sprayer: Mix SeamSeal thoroughly in the product container. Pour the mixed SeamSeal into the backpack or handpump sprayer tank. Prime the spray applicator as recommended by the manufacturer.
- Spray Application: Walk at a steady pace, spraying directly along the seam, joint, or crack. Aim to spray a narrow band with 6 inches on either side.
- Guides: Avoid overspray or uneven spray by using a masking shield or spray guard as needed.
- Watch for puddling: Use a broom or roller to spread out excess SeamSeal if needed.
- Return any unused product back to the manufacturer's container and seal tightly.
Method 2: Spray System (Flatbed Truck or Compact Unit)
What You Need:
- A clean BioSpan Spray System (flatbed or compact units), calibrated appropriately
- SeamSeal product in 275-gallon totes (for the flatbed system) or 80-100 gallons (for the compact system)
Steps:
- Site Prep: Clear any target seams or cracks of loose debris using compressed air or leaf blower. Sweep or blow the adjacent surface clean of debris. Blot the surface using a towel to make sure the surface is dry.
- Pavement Temperature: Use a temperature gun to gauge the surface and make sure it is above 50°F
- Prepare the spray system: Ensure the 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.
- Prep SeamSeal: Mix SeamSeal thoroughly (for 15 minutes within the tote) before use.
- Calibrate flow rate: Target rate is 1 gal per 300 sq ft (0.03 gallons per sq yd). Adjust vehicle speed and pressure accordingly. May slowly close the product return / recirculation valve to adjust pressure.
- Application: Switch on the appropriate spray boom from the cab control system. Use a masking shield or spray guard on the target spray nozzle and boom. Or use the wand attachment from the System walkway. Once the vehicle is in motion, switch on the Master control to start spraying.
- Drive Spray System at consistent pace with boom nozzle (and masking shields) centered on seam.
- Ensure narrow, continuous coverage over the seam. For shoulder seams, aim to apply a band of 6- to 9-inches on either side of the seam. For lane centerlines, aim to apply a band of 9- to 12-inches on either side of the seam.
- Avoid stopping mid-pass to prevent over-application.
- Post-Application: Once the spray line has been switched off and the vehicle is parked, close off the valve to the SeamSeal 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 SeamSeal 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 SeamSeal cure.
- SeamSeal Cure: Wait 2 hours before regular traffic.

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.