Quote:
Originally Posted by JRTJH
This is my opinion YMMV.....
It's the same with self leveling sealant. The problem is how the sealant "outgasses" the dispersant solvent. In large amounts there may be a problem, but in the mount we apply to reseal a roof seam, there just isn't any danger of damaging the TPO membrane from chemical dissolution caused by "outgassing"....
Again, YMMV.....
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This is good information, as I was not aware of this being the primary failure mode. I always assumed it was due to the sealant not perfectly adhering to the different surface material, regardless of how well it was prepared, just due to the chemical structure. Kind of how wood glue will not glue metal to metal, no matter how well it is prepared. Thanks for the good info John.