Pro tip: Tried a new roofing sealant on a job in Springfield last month, it peeled right off after the first rain. Learned you really need to check the temp rating before you buy.

The can said 'all-weather' but the fine print said not below 45 degrees, and it was 38 that morning. Anyone else run into this with a product that seemed good on the label?

3 comments

3 Comments

iris_ellis3mo ago

Totally disagree with Sean. Those ratings are there for a reason. I've seen it with cold patch asphalt and certain types of paint. The chemistry just doesn't set right outside the stated range. A seven degree gap is enough to keep the adhesive from bonding to the surface at all. It might look okay until the first real stress, like wind or rain, and then it just lets go. The label saying "all-weather" is pretty misleading though, they should be clearer.

sean_hunt613mo ago

Might be making a bigger deal of this than needed. A five degree difference on a cold morning seems like a small thing to cause total failure. I'd look at surface prep or maybe a bad batch before blaming the temp rating alone.

vals382mo ago

You know, I used to feel the same way about those temperature ranges. What changed my mind? I tried to use a construction adhesive last fall that said it was good down to 40 degrees. It was about 37 out, and I figured close enough. The bond failed completely within a week, just like iris said. It looked fine until it got a little damp. Now I follow those specs to the letter, because the chemistry really does seem to have a hard cutoff.