How to get old silicone caulk off and make new caulk stick
Old silicone caulk often breaks off in tiny pieces because it is difficult to loosen, and new caulk frequently fails to adhere to shower walls, separating as soon as it dries. These difficulties prevent a proper seal, leading to persistent leaks or repeated peeling failures.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Using isopropyl alcohol or commercial caulk removal sprays to soften old caulk
- 2Scraping with a flat razor or plastic razor
- 3Using a hair dryer or heat gun to soften silicone for easier scraping
- 4Cleaning the area thoroughly with alcohol or acetone before reapplying
- 5Using painters tape to create a border for a cleaner application
- 6Scraping out the old material with a flat pry bar or 5-in-1 tool, then using backer rod and self-leveling polyurethane sealant.
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“Is there a way to loosen the clear silicon caulk to remove it easier? I’ve been trying everything I can think of but it breaks off in tiny pea sized chunks.”source ↗
“Also having trouble getting the caulk to stick to the side wall of the shower. This is the 3rd time removing caulk from this shower. As soon as it dries, it separates from the wall along the base of wrap.”source ↗
“The old crack filler between my driveway and foundation is cracked in a lot of places. I'm getting a trickle of water in my basement on that side when it rains.”source ↗
“What type of tool can I use to scrap the remainder off and what should I use to fill and reseal it?”source ↗
Where this came up
People with this problem also raised
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