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Community and Q&A

Acrylic primer + tape

Mark Walker | Posted in General Questions on

Is an acrylic primer/sealer like PPG Gripper plus an acrylic tape like 3M 8067 All-Weather a good combination for air-sealing OSB to OSB (seams) and OSB to concrete (sill plate)?

Gripper is $25/gallon. I’m thinking of either using it on all the OSB or just the edges.  2″ 8067 is $0.16/ft.

Would Gripper and a dimpled rain screen coexist in contact with each other?

Is this a lot of effort for little return or an inexpensive way to get better performance out of the house?

 

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Replies

  1. GBA Editor
    Martin Holladay | | #1

    Mark,
    In my backyard tape test, 3M All Weather Flashing Tape performed very well on OSB, even without primer. Here is a link to an article with more information: "Return to the Backyard Tape Test."

    If you need to tape OSB to concrete, there are only two tapes I would recommend: either Siga Fentrim or Pro Clima Contega Solido Exo.

  2. Expert Member
    Peter Yost | | #2

    Hi Mark -

    I also did quite a bit of PSA tape testing (see the Sticky Business series of blogs now on http://www.building-wright.com).

    I agree with Martin's field testing results and recommendations. I did not test 3M 8067 but many others in addition to Martin have had good results with this tape. I do think OSB is a challenging substrate especially over time (moisture content changes that stress the adhesive bond) but crossing manufacturers for tape and primer is tricky. They all have proprietary formulations and I would not vouch for compatibility, at least not without testing.

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