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Thread: Installing mastic, DIY?

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    Installing mastic, DIY?

    I recently purchased a house that has a pool. During the pool inspection, it was shared the pool currently does not have mastic between the tile and the connecting patio foundation and would need it. I am not ready to start on the project and want to know if this is something I can do myself or if it is worth the money to have a professional do it. I am willing to do it and am not afraid to learn, as I have done several DIY projects around the house already. I have done some research online and have called a few pool stores. From what I can tell it looks as though Deck O Seal seems to be a common item used, but I would like to hear from others as well. Also, in some places there is at least 1.5 inch gap between the pool tile and the concrete patio, from what I have read online, I believe I should put rope in the gap before using the mastic. If this is the case, any recommendations on what type of rope I should use? Any help and advice you can offer is truly appreciated.

    Thank you
    Nic

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    duraleigh's Avatar
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    Re: Installing mastic, DIY?

    Welcome to the forum.

    Polyurethane caulk is commonly used at that gap. However, I would not be comfortable using it 1.5" wide. I think I would get a professional to at least give you a price quote and tell you what he suggests in lieu of polyurethane.

    "mastic" implies something adhesive to bond two things together so probably not the best thing to search for. I think you'll want to search for "caulk" to frind suggestions
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    gtemkin's Avatar
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    Re: Installing mastic, DIY?

    Quote Originally Posted by nhfrand View Post
    Also, in some places there is at least 1.5 inch gap between the pool tile and the concrete patio, from what I have read online, I believe I should put rope in the gap before using the mastic. If this is the case, any recommendations on what type of rope I should use?
    The "rope" that's commonly used is known in the trade as backer rod and is made out of plastic foam. If you go to....

    http://www.bayindustries.com/media/3...od-catalog.pdf

    ...you'll find a very detailed description and how it's supposed to be used. 1.5 inches is an industrial sized gap and from your description i can't tell if it's on the horizontal deck surface or the vertical tile to coping surface.

    There are many manufacturers of backer rod. Home Depot sells some very limited sizes but for more uncommon sizes you would have to go to a local concrete/masonry supply company.
    21K gal 16' x 40' in-ground pool built 1959, old school with Jacuzzi bronze pump, American Products 24" Sand Filter & Americana Multiport valve, Jandy Lite2 millivolt heater, Coverstar cover, and classic Kreepy Krauly.

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    Re: Installing mastic, DIY?

    I redid my mastic this year and used Sikaflex SL from Home Depot. So far so good.
    14,000 gal IG + spa, DE Filter, 400k BTU heater, Polaris 280, Aqualink RS6, TF-100 Test Kit

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    Re: Installing mastic, DIY?

    Thank you everyone! I am going to take your advice and apply it to buying the right materials this weekend.

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    Re: Installing mastic, DIY?

    I purchased all the stuff and am doing it this week. I purchased Silkaflex SL however, now that I got it home, i realize it might not work, as it is for horizontal placement and I need it for vertical. Any suggestions?

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    gtemkin's Avatar
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    Re: Installing mastic, DIY?

    SL stands for "Self-Leveling". That will not work on a vertical surface. I'm not sure a 1.5 in gap is normal. It's almost as if someone didn't complete a course of cut tile so the gap wouldn't have to be so large. The inspectors report may have used the word "mastic" but he may have left out other details of what's missing. Suggest you get someone out to your pool who's an expert and ask them what they would do to make it right.
    21K gal 16' x 40' in-ground pool built 1959, old school with Jacuzzi bronze pump, American Products 24" Sand Filter & Americana Multiport valve, Jandy Lite2 millivolt heater, Coverstar cover, and classic Kreepy Krauly.

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