MS300 Marine Sealant, Window Sealer, Pond Sealer for Leaks Concrete Glass Metal, MS Polymer Adhesive 4x Stronger than Aquarium Silicone Caulking, Black Pond Liner Marine Adhesive Sealant, 300ml

Quite awkward to work with, it sticks like mad to anything it touches, other than where you want it to stick or course. Cleaning it off your skin and nails afterwards is a challenge! But it cures very quickly even in cold weather and underwater and cured my leaky pond problems.

Works well on butyl liner to butyl liner and stone alike.

Great product. Really does what you hope it will. It is very good at fixing pond liners BUT I have to take off a star because No matter how careful you are it will get on something that you don't want it too. And anything that touches that, or touches the thing that touched that And it's impossible to get off.

Good product

Easy to apply, Nice & sticky (wet finger before touching) and invisible on black liner. Most importantly, pond no longer leaks!! Would definitely recommend

I haven't used it as yet. I need to build my pond first. I know this is the best on the market. Looking forward to using this product when putting my pond window in.

Seams like decent stuff, but would not adhere to a pond liner and concrete seam and had all fallen off by the following day.

It works ! fountain no longer leaks , it was important for it to be non toxic. Get everything ready in advance including a waste bag, def wear disposable gloves

Our rubber lining seam had come open below the water line due to drought and the ground moving. When we realized that we needed help fast. This stuff worked perfectly. Caulked the open seam right in the water and pressed it closed with some rocks. The next day we could refill and the waterline didn't drop. We'll be buying more.

Other than only available in black, this is an excellent sealant.

The item did not come with the screw on nozzle

Arrived with no top. Several other reviews mention same issue.

Arrived with no nozzle