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Bumpy coating on polyurethane floor coating

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  1. #1
    Apprentice (new member)
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    Default Bumpy coating on polyurethane floor coating

    Hi, I applied a gloss coating to some flooring as a refresher coating. I'm unable to lay it down without leaving either visual strokes (when using a brush or applicator) or a kind of bumpy surface (with a 4mm nap roller). It is fairly consistent, i.e. the bumps are all over and regular, so it isn't dust or surface contamination etc.

    This is layering on an existing floor which I carefully cleaned using the relevant chemicals to strip grease, dirt etc. Then washed clean with water. The spot test was ok, stuck well enough, didn't get rejected etc.

    I've tried applying thick and thin coats, diluting the coating, sanding it back (not to timber), tack cloths and IPA cleaner before application, or just plain wash with water then leaving to dry.

    It just doesn't seem to want to lay down smooth.

    I'm using Cabot's CFP flooring which is a water based polyurethane coating.

  2. #2
    In with the new namtrak's Avatar
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    Default

    Some photos would help. Sounds like it is possibly drying too quick. Cabots isnt a particularly good product so that might not be helping. A good hard buff with a buffing machine could help as well

  3. #3
    Seasoned DIY droog's Avatar
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    Do you have any idea what the previous coating is ?
    And did you follow the preparation guide ?

    Previously coated floors & timber floating floors

    Thoroughly clean the surface with Cabot's Floor Clean and allow to dry. Apply one coat to a small test area. Allow to dry for 3 hours. Press sticky tape firmly to the surface and pull off quickly. If the coating comes off, sanding back to a sound surface will be required.

  4. #4
    Apprentice (new member)
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    Thanks for the reply. Happy new year!

    I'm not sure what the previous coating was as it was there when I bought the house. I did follow the instructions for applying to an existing surface, including cleaning it to remove any polish etc.

  5. #5
    Apprentice (new member)
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    Hi, thanks for the reply. I tried another coating and a few other things after reading your message (hence the delay in response). I had some Gemini from another more successful coating attempt on a different floor.

    I created an Imgur post with a pic of the Cabot's from before, and a few of the attempts on sanded floors after. Any advice on how to improve is welcome, thanks!

  6. #6
    Community Moderator phild01's Avatar
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    Default

    Kerry, please use this site's image uploader for your pics...not a hosting site.

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