What product or methods can I use to create a perimeter/barrier/dam on thinset for self leveling compound in a doorway? I'm pouring 300sf in sections as the SLC has limited working time.

Thermostrips won't work as the surface is not flat. I could create a temporary barrier using spray foam or caulk, but it might be a pain to remove. Is there a temporary product that would be easy to remove from thinset and SLC?

  • 1
    Some insight into your situation would be good. There's no one answer. Please post a better description or link a photo.
    – isherwood
    Commented Apr 12, 2021 at 13:38
  • 300 sq/ft is a fairly small room, so the "in a doorway" comment doesn't make a lot of sense in that context. Pictures of the area to be filled would be best, but editing in more details would go a long way to helping us understand.
    – FreeMan
    Commented Apr 12, 2021 at 14:30
  • Also, I'm not certain why those Thermostrips won't work, they look ideal. They're made out of "synthetic cork", so I'd think they'd be flexible, in case the floor is wavy. Maybe describe why you don't think they'd work - nothing says that you have to fill the entire space to the top of the strip all the way around, just fill until you've got a level surface...
    – FreeMan
    Commented Apr 12, 2021 at 14:33
  • I don't have any help, so the plan is to break up the 300sf into manageable sections. When the tile was removed, it left a very rough surface. I don't see the Thermostrips creating a tight seal against the floor. How can I post a picture?
    – Tim
    Commented Apr 12, 2021 at 21:02


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