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Discussion Forum

Sap bleed-throughs

BETBEN | Posted in General Discussion on November 2, 2009 06:23am

What can I use to prime previously-painted wood where the sap from knots continues to bleed through? I’ve tried yellow shellac but that doesn’t seem to work. Thanks for any and all replies!

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Replies

  1. User avater
    McDesign | Nov 02, 2009 07:30pm | #1

    The alcohol-based B.I.N.

    1. User avater
      Crash | Nov 02, 2009 08:48pm | #3

      I just used the BIN, two coats of it, covered by two coats of white latex top coat and the sap color still bled through after a few days.  I was going to ask the forum for an alternative to BIN! 

       

      1. User avater
        McDesign | Nov 02, 2009 09:16pm | #4

        Are you sure it was the alcohol-based BIN?

  2. User avater
    McDesign | Nov 02, 2009 07:31pm | #2

    Oh - and welcome here!

  3. YesMaam27577 | Nov 02, 2009 11:27pm | #5

    Shellac is probably the best sealer I've found. But you can't just use one or two coats , when you're dealing with the tough spots.

    That's the bad news.

    The good news is that the stuff dries so quickly that you can do 7 or 8 coats in one hour.

    I won't be laughing at the lies when I'm gone,
    And I can't question how or when or why when I'm gone;
    I can't live proud enough to die when I'm gone,
    So I guess I'll have to do it while I'm here. (Phil Ochs)

  4. john7g | Nov 03, 2009 12:03am | #6

    had good luck just recently with SW Oil Base Ext Primer on cedar with 2 coarts of Duration but it has yet to live through a hot summer here and that will be the test. 

  5. User avater
    Jeff_Clarke | Nov 03, 2009 01:52am | #7

    Cover Stain.   You can spray but brushing will put on a heavier coat.

    View Image

    View Image
    Oil-Base Primer-Sealer
    All Surface, All Purpose Stain Killer Bond Coat

    • Interior and exterior
    • Best exterior wood sealer
    • Blocks cedar & redwood bleed
    • Seals water, smoke & nicotine stains
    • Sticks to all surfaces without sanding
    • Dries in 1 hour

    I've also had luck using aluminized metallic spray paint over pesky knots.

     

    Jeff



    Edited 11/2/2009 5:54 pm ET by Jeff_Clarke

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