It stuck and held well on my white silicone case for my iPhone X and I took it off twice and had no problem holding it after I reattached it with a silicone had case. Now I have chosen my heavy iPhone battery case, which is also made of silicone and is very heavy. I really didn't think it would even start sticking and holding onto the battery as this is my third time using it on a different case and due to the extra weight, but it stuck and still works. I almost didn't buy this because a lot of people have mentioned that they don't stick to silicone and I think the manufacturer even claims not to use it with silicone, but I've had no issues with multiple silicone cases. Great purchase and great color option - white! I wanted white because I always buy white cases and wanted it to blend in with the rest. It wasn't easy to find pure white, so thanks for offering it in white!
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