I had the same experience with paint cracking after using an old tube of paintable caulk to finish caulking the new crown moulding in my bathroom a couple of years ago.
I'm now cutting out the old caulk with box cutter and filling with new caulk. This was my first and last use of old caulk. At $1.50 a tube you don't want to skimp on quality by using old stuff.
BTW, I checked with tech service at GE re 100% silicone caulk problems and the tech I talked to said to always use fresh caulk (there's a date code on the bottom of each tube - never use caulk more than 2 to 3 months old).
She said to always run a 6" line of caulk on a scrap board and wait a half hour. It should just start skinning over and be pliable and sticky. If it's got a granular feel it's toast, throw it out. I use a lot of caulk in my handyman business and I hate callbacks and lousy looking caulking jobs.
Also, the tech said that ALL original caulk must be removed when re-caulking with 100% silicone. Silicone will NOT bond to silicone. She suggested that I use isopropyl alcohol when scraping to help remove the caulk. She said the alcohol helps break the bond.
Since I started to use her advice I've had a 100% success rate.
I'm now cutting out the old caulk with box cutter and filling with new caulk. This was my first and last use of old caulk. At $1.50 a tube you don't want to skimp on quality by using old stuff.
BTW, I checked with tech service at GE re 100% silicone caulk problems and the tech I talked to said to always use fresh caulk (there's a date code on the bottom of each tube - never use caulk more than 2 to 3 months old).
She said to always run a 6" line of caulk on a scrap board and wait a half hour. It should just start skinning over and be pliable and sticky. If it's got a granular feel it's toast, throw it out. I use a lot of caulk in my handyman business and I hate callbacks and lousy looking caulking jobs.
Also, the tech said that ALL original caulk must be removed when re-caulking with 100% silicone. Silicone will NOT bond to silicone. She suggested that I use isopropyl alcohol when scraping to help remove the caulk. She said the alcohol helps break the bond.
Since I started to use her advice I've had a 100% success rate.
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