Bonda G4 Pond Sealer - Clear 2.5kg

The media could not be loaded. If you have a leaky pond buy this its great , I had three holes pop in the bottom of my pond its been there about 19 years with no probs - this size can does a pond this size one coat ( maybe took a bit more as the original coating is textured finish ) I bought a second can to give another coat - only used half for second layer but I will be using up the rest next time it is completely emptied if it doens't go soild - it does harden very quickly but have sealed the can really well so hoping it will stay ok for a while - bit expensive but worth it , it does the job well .

I first bought some of this a couple of years back - back then it was like painting on a thick gravy. I dunno if they've changed the formulation, but this time around it was more like honey. It's much harder to paint on evenly (onto uneven surfaces, like rocks).A necessary evil, but also the need to paint 3 coats at 2-3 hour intervals is a pain too. It basically means you can't do much for an entire day except paint this stuff on. Also, the brush will "go off" in that time, even if wrapped in plastic so probably best to budget for a fresh brush for each coat (and no, don't even think about cleaning brushes). The first coat soaks in a lot, so you'll worry you don't have enough to finish, but the third (or fourth) coats feel more like a formality. On that subject - make sure you absolutely do have enough to finish the job - if you leave it too long between coats, the next one won't bond and will just come off in flakes/sheets. "Range anxiety" means you're going to end up with half a tin of this left over - and that's really just extra cost for the job.The tin is also made so that you absolutely can't pour some out into a pot without spilling some down the side of the tin, or on the floor, over the cat, etc. You also won't be able to get the very last of it out either - not economical, nor environmentally friendly. Also make sure you clean off the threads of the lid and spout because once this stuff sets, it's like glue.All that said, once it's done, and once you've sorted out the places where it's sort of "pooled up" or otherwise didn't bond to the surface properly or whatever else went wrong, it's pretty nice. After a couple of years, things like moss will return and stop it looking quite so shiny. A jetwash will soon clean it up if you want though.As others note, it's not "clear" at all - it's definitely got a browny/yellowy colour when applied. It also makes a glossy finish. In my case over sandstone that's quite a change, but actually not unpleasant once you get used to it and it (and things around it) mature a little. It definitely does seal things up and makes them waterproof though - so in that sense it works very well. It's just a journey to get there.

We purchased a large terracotta pot that we wanted to turn into a water feature but needed to seal the inside. I followed the instructions and 3 coats later it worked and looks great. I purchased to 2kg tin and still have lots left.

I have a small (3m*1m) garden pond partly sunk in tot he garden and partly out constructed of concrete blocks with a concrete screed to finish the inside. The bottom of the pond is at three levels. Initially it was waterproof but after a couple of years I began to get a little seepage showing as damp patches on some of the blocks and a slow drop in water level. I decided to give this a go, drained and cleaned the pond and left it to dry out thoroughly. I then applied a total of three coats of this to the walls and base (mainly because I wanted to use up the tin). The first application seemed to use a lot of the liquid and this presumably was because it was being sucked into the concrete. The next two coats went a lot further. So far after about 6 months the pond seems absolutely watertight and the pond plants seem happy (I don't have any fish). Very pleased with the product as it did what I needed with minimum fuss.

Used for an old cascade on rough purbeck where previously loosing loads of water. I did check & re-point area first. I did not totally keep to app timings due to area. Did 3 coats, used @ 15% more due to rough surface. Not too much trouble with pooling. 4 starstruck only because I can't prove longevity yet ( usual issues with these reviews) but run water through for @ 1 week & so far it's very good. I've included a photo so you can see colour impact of 3 coats- after which it goes honey colour. Also the left hand cascade has not had water cours run through, only washed down so its much easter to see impact to painting. If it lasts I'd use it again so to speak. Yes, I'd recommend this stuff.

I was losing water in my man made stream that supplies my fish pond. I removed any debris, then thoroughly dried the stream bed before applying two coats. That was eight months ago. I have not had any water loss since.I gave some to a colleague to use on his concrete fountain with the same results .

Good product with value for money but need ed three coats and can was quite adequate.

Easy to use, follew the instructions and it works perfectly. I have used it to seal an Acer bed to stop lime from the wall leaching into the soil so only needed two good coats not three. 1st coat goes into the render, second coat is really easy as it's only adering to the 1st coat.