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

Good stuff done the job

Works really well ( ie waterproof).

Fixed quite a large hole in pond liner,had a piece of spare liner that I fixed over the hole and it's not leaked.

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.

I had a large crack along the ridge of my 30yr old plastic pond, and removing the established pond would have been a major job. I spotted the MyPond Marine Sealant but was a bit sceptical at first. According to the instructions it’s harmless to pond life and fish which was the most important bit to me! … I used the colour Black to match the pond which is easily applied by the use of a sealant gun, “however be warned” wear disposable rubber gloves! As it’s difficult to remove from skin. I got some on my wrist, but used “Isopropyl liquid” to get it off without any drama. There is a slight odour although nothing to worry about. After filling the large crack I smoothed it off with a putty knife and allowed it to set for 24 hrs, then topped back up with water. The end result is Great, no leaks whatsoever. I’ve also covered the area over with a large flat decorative stone which just overhangs enough to hide the repaired area…. it’s now 2 months since I repaired the crack and everything is looking good, and will keep my eye on it’s durability over the next 12 months and beyond… For me it’s been a very cost effective lifesaver and would definitely use again if needed.

I used this to repair a tear in a pond’s liner. Having cut a small patch of liner about 20mm larger than the tear, I applied the sealant all over and around the tear then placed the patch over it. Allowed recommended 24 hours to cure then refilled the pond. Three days later it seems to have worked perfectly with no apparent drop in level.

Did the job, sealed the crack in my concrete pond, even below the waterline. Best to use gloves though as would be hard to remove from skin.

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

Excellent, works as promised.

The reason I returned it ,is because it needs a primer for concrete and the specific primer for humid septic tanks is very expensive

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

Good

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.