Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: repair crack between stone / mortar on waterfall spillway

  1. Back To Top    #1
    jeffreymlewis's Avatar
    Join Date
    Jul 2012
    Location
    Walnut Creek, CA, USA
    Posts
    7

    repair crack between stone / mortar on waterfall spillway

    Hello pool experts!

    Last year I noticed a gap forming between the mortar and rock on my waterfall spillway (see picture below). I thought it would be a good idea to inject a concrete/masonry caulk into this gap as a preventative measure.

    However, I can't figure out which material to use. The area to be patched is in constant direct sunlight, so polyurethane is out (since it can't withstand UV rays). A silicone masonry caulk can withstand UV, but silicone is not recommended below the waterline. (This is the waterfall spillway, after all, so it will be covered by water 24x7.)

    Then there are Polysulfide products (for boats and such). These can withstand UV rays and are fine below the waterline. However, I cannot find a polysulfide caulking rated (tested) on concrete/masonry. Any ideas?

    Thanks,
    Jeffrey


    15k gal, IG painted plaster (black), 3.0 HP Intelliflo VS, Pentair CCP240, MiniMax 400, build date unknown (estimate 1995), attached spa w/ water fall

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: repair crack between stone / mortar on waterfall spillway

    There is no UV penetration below the water line.

    Additionally, I have used poly caulk in full sun for years......very acceptable.

    I would use that stuff from HD or Lowes that has sand embedded in it for a decent texture match and never look back
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Jun 2013
    Location
    SpringHill FL
    Posts
    415

    Re: repair crack between stone / mortar on waterfall spillway

    I agree with Dave. Check the tile section with the grout. They sell sanded grout caulking. Chances are they have a close match to your color
    Nathan
    15x30 gunite 18k gallons Hayward star clear plus 120sqft cart

  4. Back To Top    #4
    jeffreymlewis's Avatar
    Join Date
    Jul 2012
    Location
    Walnut Creek, CA, USA
    Posts
    7

    Re: repair crack between stone / mortar on waterfall spillway

    Funny, I was just in the tile section of the hardware store the other day looking for caulking for the kitchen counter, and found this grout-like caulking that I never knew existed. Thanks for the advise, I'll give it a try.

    - Jeffrey
    15k gal, IG painted plaster (black), 3.0 HP Intelliflo VS, Pentair CCP240, MiniMax 400, build date unknown (estimate 1995), attached spa w/ water fall

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •