I need to caulk some aluminum-framed window panels (we’re talking aluminum-to-aluminum seals here) this weekend. The temps are predicted to be in the teens-twenties-(maybe)thirties. My first choice caulk, GE Silicone II, says not to apply in temps below 40 F degrees. Does it really matter? If so, what should I use instead?
Thanks all in advance.
I’m not certain what you should use, but I have tried GE Silicone II at <40°F. The stuff does not polymerize right at low temperatures. It will remain a sticky gooey mess, even after temperatures warm up.
Check out an elastomeric polyurathane caulk like Solar Seal™
Still might not be able to apply, read the instructions carefully in regards to temp. They mean pretty much exactly what they say.
One way I use to do it on new home construction during the winter is to wait til the forcast warmest day available, and the night before turn on the heater to about 85 degrees. Then, work on the side getting direct sunlight. Had mixed results, but worked more than it didn’t.
If you have no choice and you are trying to prevent damage, then use it - or something that will flow- when you take it from room temp outside. Now, while it won’t set perfectly, if you have no choice it will be ok. Sure, it won’t set up for 25 years of flexibility and protection, but use it in a pinch.
The bit@% is that you have to remove and re-do it later.