How Do You Stick Stones to a Pond Liner

Options. Pond installers often recommend silicone caulk for sealing rocks to the pond liner as well as to each other. It is waterproof and non-toxic, but it may not be able to hold large rocks together, and while it has bulk, it can’t seal gaps wider than about an inch.

Can you put rocks on pond liner?

Use large, smooth rocks placed just one layer deep and if you have included a bottom drain, keep a wide area around it free of rocks. Debris won’t get trapped as easily between smooth surfaces plus there is less risk of damage to the pond liner. Invest in a pond vacuum cleaner to clean the rock surfaces of debris.

What glue is safe for fish ponds?

Cyanoacrylate Super Glue and pure silicone are the most common aquarium safe adhesives used.