Hello. There are double-sided tapes on the back of the product. Normally, double-sided tape is sufficient for ceramic surfaces. However, when factors such as cold environment, rough surface, slippery damp surface, etc., the tapes can be dissolved. But our customers expressed that they were satisfied with the double-sided tape. If the surface to be pasted is rough and will affect the adhesiveness of double-sided tapes, we recommend that you support it with 'Mirror Silicone'. But the mirror silicone sticks solid and can be a pain to remove. Your decision is important in this regard. We wish you healthy and happy days.