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Thread: To seal or not to seal moss rock

  1. Back To Top    #1

    Join Date
    Sep 2016
    North Richland Hills, TX

    To seal or not to seal moss rock

    Time to make a decision on sealing. The builder is recommending that they seal the rocks when they do the coping. Since this is moss rock I'm not sure that makes sense? Wouldn't that clog up the pores and keep moss from growing? Maybe it's an aesthetic decision. Just curious if you guys had any experience with this.

    Also, the colors int he rock really come out when wet. Standard sealing won't change the appearance, but I understand enhancing would. If sealing is recommended, would enhancing vs standard sealing make any difference on way or another?

    Ongoing build, started in Aug, ​19K gal, IG pebble, 3 HP Intelliflo VS+SVRS, 420 sqft Pentair Cartridge Filter, Intellichlor SWG, IntelliPH, 48sqft Spa, 400K BTU NG Mastertemp Heater, Legend 1 cleaner, 3/4 HP Boost Rite cleaner pump

  2. Back To Top    #2
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Re: To seal or not to seal moss rock

    Sealing would likely inhibit the growth of moss but is moss something you really want in and around your pool? Seems like you just be introducing a lot of organic debris into the water that way.

    As for sealing versus not sealing, it's really up to you. A good quality penetrating sealant like DryTreat 40sk or DuPont StoneTech will certainly keep moisture out of the pores but you will have to reapply the sealer on a scheduled basis (typically anywhere from once every 18months to 3 years depending on heat and sun exposure). Typically a penetrating, non-color-enhancing sealer will darken the stone a shade or two, but it should be minimal. Unless you are really trying to go for a specific color, then using any kind of "enhancer" probably doesn't make much sense given the fact that you'll be re-applying it. In other words, Day 1 after applying the enhancer will make it look awesome and then every day after that it will get lighter and lighter until you reseal it again. So somewhere between those two endpoints you'll be looking at the stone and thinking, "Gee, that's not the look I was hoping for...".
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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