I prefer 2-part sealer but used a 1 part sealer for most of this floor because Chad didn't have the 2 part I used to use, and he recommended this single part on instead.
Unfortunately I forgot a lot of what I used to know about seam sealing and waited too long to remove my tape, which caused the sealer to string or lift and it looked terrible. Even more so, after I removed the tape from painting the floor it lifted a lot of the sealer in the exterior seams. I had to cut it down and re-seal in a lot of spots but it turned out fine and didn't require too much effort.
The trick is to tape off your seam, apply a small amount of seam sealer, then I run my finger along it to smooth it out, and then immediately remove the tape. It will give you a nice looking seam:
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What I should have done on the edges of the bed (since I was taping off the sides first to paint the floor) was tape, apply sealer, immediately remove tape, let sealer dry, then mask. Once I had done the final spray of the entire bed and removed all the masking, I took a fine tipped modeling brush and applied paint leftover from my cup to areas of the sealer that might not have got covered due to the tape being just a little off. The paint flows out in these tiny spots and the correction is impossible to tell.