I used an older tube of clear silicone and ran a bead along the back of a new cabinet top in our downstairs bathroom. 14 hours later, it hasn't even skinned over.
I can scrape the majority of it out easily enough, but what should I use to clean up the residue? Vinegar? Soap & water? Other?
It sounds to me the stuff was old. It never will cure if it was. However, I applied some to my barn a little over a year ago. I was just plugging some nail holes in sone used tin. It plugged the holes but remained soft. I planned to remove it and replace it, but this was in late fall of 2004, and it was getting cold so I just left it. Spring came and I was busy with other things. Late last summer I went to replace it and found it was semi hard. Apparently the hot sun baked it. It's not quite normal, but the holes are plugged and its in a spot where it dont really matter too much. So, it will stay. But it took a good year to semi-harden. Maybe after another summer it will completely harden???? This is fine on my barn, but in your bathroom, you dont want that.
I do wonder if you removed as much as possible with whatever scraper you can find. Then try to apply some new silicone. Will the new stuff cause the bad stuff to harden? I dotn know, just a guess.... I had planned to try that on my barn but like I said, it was semi hard, so I just left it.
I read what others said. I doubt the heat will work. Kerosene might work, but I would not try to apply new silicone to anything saturated with kerosene.
I learned the hard way. If it comes out of the tube with difficulty, toss it.
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