Is Hydralastic 836 compatible with oriented strand board (OSB)?

Yes, Hydralastic 836 is chemically compatible with OSB.  Hydralastic 836 should be applied to the rough side of the OSB.  Typically, one side is treated and smoother than the other.  The board joints should be primed and detailed with Precon Fabric Tape.  The tape is 12” and it can be cut down.