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Sealing Spoil Board

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  • Sealing Spoil Board


    LDF & MDF finally came in and I have a lot of Kilz paint which is an excellent sealer for odors. Will it work and if so will 2 coats of it be sufficient or should I using a different product?
    Also have an exterior grade polyurethane. Thanks
    Stinger III - SR48
    3.5hp Milwaukee
    Pro Package
    Indexer
    Black Box Hurricane
    Aspire 10.5
  • #2

    Are you talking about sealing the edge of the spoil board so you don't lose vacuum?
    If so, I just roll on a nice thick coat of wood glue like Titebond II with a small 1" wide roller.
    You could do the same thing with the polyurethane.
    Pete
    ----------
    2021 Stinger I SR-24, 1kW Spindle
    Performance Pkg w/Gantry Lift, FTC
    Phenolic Top, Storm Vac, JTech Laser
    VCarve Pro 11.0
    www.gotoguysmarine.com

    Comment

    • #3

      I need to seal the bottom of the grid board (119" x 49") as well as the edges. I've never worked with mdf before and from what I'm reading I need to spray 2 coats of primer then 2 coats of polyurethane to get the best seal. Is that true? I have a BlackBox Hurricane vacuum and assume I want the best seal possible for it to work well on this table.
      Last edited by Ron Hampe; 06-14-2022, 07:19 PM.
      Stinger III - SR48
      3.5hp Milwaukee
      Pro Package
      Indexer
      Black Box Hurricane
      Aspire 10.5

      Comment

      • #4

        Nope. You don't want anything on the mdf surface - only on the edge.
        You need to usually take off .01-.02" on each side to remove the surface sealer. You want maximum airflow through the mdf.
        ​​​​​Some folks use silicone or a little double stick tape near the edges and a little in the center to keep the mdf in place when the vacuum is not running.
        Pete
        ----------
        2021 Stinger I SR-24, 1kW Spindle
        Performance Pkg w/Gantry Lift, FTC
        Phenolic Top, Storm Vac, JTech Laser
        VCarve Pro 11.0
        www.gotoguysmarine.com

        Comment

        • #5

          I was referring to the mdf with the grid cut into it. What is the point in sealing the edges if the bottom surface below the grid isn't sealed as well?
          Stinger III - SR48
          3.5hp Milwaukee
          Pro Package
          Indexer
          Black Box Hurricane
          Aspire 10.5

          Comment

          • #6

            Ok, so you are talking about the vacuum plenum. Mine is phenolic but sure, you should paint or seal the plenum after making it flat. Sorry for the misunderstanding.


            Pete
            ----------
            2021 Stinger I SR-24, 1kW Spindle
            Performance Pkg w/Gantry Lift, FTC
            Phenolic Top, Storm Vac, JTech Laser
            VCarve Pro 11.0
            www.gotoguysmarine.com

            Comment

            • #7

              Thanks. These are new boards. I bought my Stinger used and it came with t-tracks and was not setup for vacuum.
              Stinger III - SR48
              3.5hp Milwaukee
              Pro Package
              Indexer
              Black Box Hurricane
              Aspire 10.5

              Comment

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