Polymetric sand Question?

Discussion in 'Hardscaping' started by Blmtlandscapes, Jul 21, 2008.

  1. Blmtlandscapes

    Blmtlandscapes LawnSite Member
    Messages: 116

    I have just used poly sand for the first time on a walkway. I followed the directions carefully but we got some unexpected rain about 8 hours after I put the sand in place. Luckily none of the sand made it on to the pavers but when I felt the sand this morning it was really soft and it seems like the chemical bond barely took place. Will it eventually get stronger when the weather gets better, or is there anything else I can do to help make it stronger. Thanx
  2. BOEpavers

    BOEpavers LawnSite Member
    Messages: 92

    Too much water too soon will cause the "polymer adhesive" portion of the sand to wash out. If this happens it will probably never set up. I'd wait for a spell of 3 or 4 dry days and see if the sand hardens. If it doesn't you have no choice but to remove it and reapply. The same can happen if you apply too much water when installing the polysand. We also tried a brand once (forget the name) that was applied under perfect conditions and wouldn't set. Removed it and reinstalled with Techni-Seal (our preferred and now only brand we use) and no problems in 3 years.
  3. Mike33

    Mike33 LawnSite Bronze Member
    Messages: 1,649

    What is the correct procedure for appling the water to the sand on a paver job. I only did it once and wasent sure.
  4. shethinksmytractors_sexy

    shethinksmytractors_sexy LawnSite Member
    Messages: 119

    just sweep the sand in real good and mist over it with a garden hose. it should set up with no problems if you do that.
  5. Rex Mann

    Rex Mann LawnSite Senior Member
    Messages: 621

    We use Techniseal brand , too.

    1. sweep it in
    2. run compactor over it one more time
    3. sweep again to fill remaining joints
    4. use a gas powered blower and blow off all polymer dust
    5. lightly wet down the sand..this sets it just below the chamfer or surface
    6. wait 15 minutes and lightly wet again
    7. wet one more time....
    8. Get paid

    if you apply the water to fast one of two things will happen. One,
    you can wash all the polymers to the bottom of the joint. Two, all
    the polymers can float to the top and stick to the pavers.

    If you do not apply enough water, all the polymers through out the entire joint will not get activated.

    Tip: if you see white foam on the pavers you have added water to fast

    Sand will start to set up by the time you clean up and are ready to head out.

    Your current problem: If the sand does not set up, I would try to apply IN sealer from Techniseal. It is invisible and will lock the sand in the joints.
    It is easier then removing the other sand.

    Good luck


  6. PatriotLandscape

    PatriotLandscape LawnSite Bronze Member
    from MA
    Messages: 1,209

    My favorite thing to do after the poly goes in :D
  7. zedosix

    zedosix LawnSite Silver Member
    Messages: 2,665

    If you would of waited til noon most likely the sand would not of been soft. It just didn't get a chance to have the sun on it yet. Rex said it best, its very important to mist it lightly and not to over do it. If you had set it up properly I doubt rain 8 hrs later would of made much difference.
  8. DVS Hardscaper

    DVS Hardscaper LawnSite Fanatic
    Messages: 6,619

    Poly sand can be frustrating when you have an Immigrant work force and none of them speak enough english to comprehend why the water spray must be a mist. :dizzy:
  9. zedosix

    zedosix LawnSite Silver Member
    Messages: 2,665

    Thats got to be a challenge to have employees that don't speak fluent english. I am lucky to have bilingual employees.
  10. CALandscapes

    CALandscapes LawnSite Senior Member
    Messages: 946

    It's nice to speak Spanish.

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