What kind of adhesive should I use to stick a towel rack to tiles?

1. All-purpose glue: This type of glue dries quickly and can be applied directly to the towel rack. It has a high viscosity, but its load-bearing capacity is relatively low.

2. Nail-free adhesive: This type of glue is very strong and adheres the towel rack firmly, but its load-bearing capacity is limited after application.

3. Transparent plastic glue: Apply directly to both the towel rack and the wall, align them, and press them together. It will become sticky, but it takes about two days to reach its maximum viscosity.