The plastic steel balcony is leaking, and I want to use plastic to stick the gap, what glue is good

Good quality plastic steel mud can repair bathroom tile joints and prevent water leakage in the house. To achieve the desired effect, you need to buy better quality plastic steel clay for gap repair. Nowadays, there are many brands of plastic steel cement on the market and online, and you need to choose a better quality to repair, so that you can achieve the effect you are satisfied with.

There are generally two ways to deal with this situation, the first is to fill the void at the bottom with cement or styrofoam. The second method is to add fixing bolts to the sides to prevent further sinking.

Try to remove the failed and broken adhesive and re-apply the sealing foam.

You should use gap tape to plug the air leakage, I have seen such tape in Japan, I don't know if there is one in China.

You can use a sealant to plug the leak water, but it is best to choose a sealant with good mold resistance, such as Dow Corning, Sika, HASUNCAST, etc.