Replies

1. 
   maine_tyler | Feb 01, 2023 07:21pm | #1

   Arnold,
   I've used a lot of OSI quad max. Sticky stuff, seems to work well.
   Are you placing it on the framing before securing the plywood, or are you trying to fill the seam afterwards? If the latter, I would opt for a tape.

1. 
   arnoldk | Feb 02, 2023 06:42am | #2

   I am trying to seal the seam on the inside of the wall at the top plate as shown in the picture in red (not my picture).

   The hardware stores don't seem to carry OSI Quad Max

   Thank you,
   Arnold

   
1. 
   kurtgranroth | Feb 02, 2023 09:18am | #4

   OSI and LePage are both sub-brands of Henkel. Since OSI and LePage Quad Max are from the same parent company; have the same name; nearly the same packaging; and almost identical descriptions, I'm going to assume that they are exactly the same product.

1. 
   arnoldk | Feb 02, 2023 11:21am | #5

   I noticed that to and was wonder the same thing. Things in Canada are often sold under an different compared to the USA which is ignoring.

   Thanks,
   Arnold

2. Expert Member
   BILL WICHERS | Feb 02, 2023 08:47am | #3

   I've used the Dynaflex product many, many times, although not specifically for air sealing. I see no reason why it wouldn't work for that. I would put down a heavy/thick bead where you're trying to seal, then I'd push it into the crack and spread it a little using a caulk finishing tool. Why a caulk finishing tool instead of a finger? Because I'd rather the tool get a splinter than my finger, and you can't count on framing lumber to be splinter free -- especially on the long corners.

   My usual preference for air sealing is the polyurethane sealants in Loctite's PL line, which I think is under the LePage brand in Canada. I like the PL sealants because they are *far* toughter and more durable than any others I've used, and I think they'll hold up better over time as a result. They do take a while to fully cure though.

   Bill