I have discovered a somewhat concerning phenomenon.
Last fall, I was supposed to fill around a newly built basement staircase, and I put styrofoam on the retaining wall. I glued the styrofoam with PL600 so that it would stay in place until it was filled.
I never got around to ordering gravel, etc. (a crane arm truck is needed to scoop it into the right place). Winter came, lots of snow, etc.
I observed during the winter that the panels had come loose and were lying under the snow in the pit. I assumed that water had gotten between the wall and the styrofoam, frozen, and that the styrofoam had then broken at the boundary with the glue.
Anyway, today I put the panels back, hoping to order gravel this week. It wasn't the styrofoam that gave up; it was the glue. The glue was very porous, and I could easily remove glue from the wall, where there were lumps of glue, you could easily pulverize the glue between your fingers.
This doesn't matter to me; the glue only needs to work until the gravel is in place.
But I shuddered at the thought of possibly using PL600 to set up something important. As far as I understand, PL600 should be essentially equivalent to PL400, the difference being that it's water-based. According to what is written on the tube, it should work down to -30. However, we did have -32 on the thermometer for a few hours this winter...
Last fall, I was supposed to fill around a newly built basement staircase, and I put styrofoam on the retaining wall. I glued the styrofoam with PL600 so that it would stay in place until it was filled.
I never got around to ordering gravel, etc. (a crane arm truck is needed to scoop it into the right place). Winter came, lots of snow, etc.
I observed during the winter that the panels had come loose and were lying under the snow in the pit. I assumed that water had gotten between the wall and the styrofoam, frozen, and that the styrofoam had then broken at the boundary with the glue.
Anyway, today I put the panels back, hoping to order gravel this week. It wasn't the styrofoam that gave up; it was the glue. The glue was very porous, and I could easily remove glue from the wall, where there were lumps of glue, you could easily pulverize the glue between your fingers.
This doesn't matter to me; the glue only needs to work until the gravel is in place.
But I shuddered at the thought of possibly using PL600 to set up something important. As far as I understand, PL600 should be essentially equivalent to PL400, the difference being that it's water-based. According to what is written on the tube, it should work down to -30. However, we did have -32 on the thermometer for a few hours this winter...