| SANDLOCK Use on Wide Joints (over ½”) |
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| When filling joints wider than ½”, such as on natural stone pavements, sand is not enough. Either using SandLOCK PREMIX or sand mixed with SandLOCK ADDITIVE does not provide enough structure in the joints. |
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Step 1 - Fill the empty joints with open-graded aggregate (3/8”, ½” or ¾” Clean, depending on joint size). Do NOT use dense-graded aggregate (base material). Spread the open-graded aggregate over the stone surface until all the joints are full. Sweep off excess aggregate.
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Step 2 - Sweep SandLOCK PREMIX or Course Concrete Sand mixed with SandLOCK ADDITIVE into the joints. This will fill the remaining voids between the open-graded aggregate. Sweep off excess when all the joints are full.
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Step 3 - Use a leaf blower to remove any remaining SandLOCK residue from the surface of the pavement. Be careful not to blow the joint material out.
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Step 4 - Saturate the surface with water to activate.
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