Polymeric sand must suit the stone, joints and base. Follow the selected product’s instructions for placement, activation and curing.
Check compatibility before purchase
Polymeric sand uses binders to stabilize the joint material. Products differ in their requirements. Confirm approval for natural stone and the proposed base.
Check minimum joint width and depth. Some products are not suitable over concrete or where moisture remains. Do not assume one sand suits all paving systems.
Prepare a test area
Natural pores can hold sand residue. Test the product on spare material or a small area. Confirm the appearance after full curing.
The stone surface and joints must meet the manufacturer’s moisture requirements before application. Damp residue can bond to the face.
Apply the specified sequence
- Confirm suitable weather and temperatures.
- Prepare the stone and joints as directed.
- Fill the joints to the specified depth.
- Use the specified consolidation method.
- Remove all excess material from the face.
- Activate with the required amount and method of water.
- Protect the joints during the stated curing period.
Do not replace the water instructions with a general misting rule. Too little or too much water can affect the result.
Protect drainage and movement
Joint filler does not repair weak bedding or poor drainage. Keep designated drainage details and movement joints as specified.
Read grout versus polymeric sand and the installation guide. Confirm the stone and joint product together with your installer.
Maintain the joints
Inspect for loss of material or persistent moisture. Identify the cause before repairing an area. Use only a cleaning method compatible with the stone and joint product.
Questions and answers
Can polymeric sand be used in a zero-width joint?
Use the minimum width and depth required by the selected product. A tight joint may not accept or activate the material correctly.
Does polymeric sand replace edge restraints?
No. Joint material and edge restraint perform different roles in the paving system.
