Bonda G4 Pond Sealer Clear 1kg

Why did you choose this product over others?:Fair price and very effective in its chosen use

This product is great, we have had a pool for 30 years, and suddenly started leaking, not sure where the leak was, we used this product and hey presto, it leaks no more! It has sealed the floor and walls of the pool.

I used it to seal a pond waterfall of glued (with silicone) together rocks.Has a sort of yellow/brownish/clear tint... but it looks natural on stones and cannot be seen under waterQuite sticky and thick (a bit like Mable syrup), and connects well to stone or similar materials. Not so for silicone or plastics.... though it still does create a protective film, even if it does not "glue" so well to e.g. silicone.Not flexible when cured. It will likely crack if painted on moving stuff.Finger dry rather quickly (for second coating something like 3 hours of curing is enough, or even less - in good weather perhaps 1-2 hours)Cures well under even cold and humid weatherThey recommend 2-4 coats, imo 2-3 is quite enough and I can imagine even one coat to be efficient in some cases. It all depends.PROS: Does what it says on the box and is easy to work with. Durable and can take a beating once cured.CONS: Not flexible when cured, and does not seem to bond very well with plastic or silicone surfaces.

Used this to seal a leaking water feature reservoir (resin). Been 3 weeks now and zero leaks. Not cheap but it works.

After 2 years, my 2000 litre concrete pond started leaking. After draining, cleaning and drying the pond, I noticed a few damp patches where water appeared to be leaking back in. I wire-brushed and hoovered the entire pond, and then brushed (dustpan brush) wet cement (cement and fine sand) all around the pond floor and walls and left to dry. The next day I repeated this step. When dry, I painted the leaky areas with G4 first and left for an hour. I then painted the whole pond with a single brushed coat - and was I careful to stipple, swirl, and fill every nook with G4. I left to cure for 24 hours before washing down, and refilling. Two days have passed and the water level is the same. Fixed! Warning: G4 is very smelly and made me feel ill, and when it sticks to your hands you realise how stubbornly it is bonded to your pond! Don’t put too much on the brush and really work it around.

This is not clear. It leaves a golden honey colour on whatever you paint it on. Wish they were clearer on this as it's affected the look of my water feature. Not sure if it works yet. Still need to fill it with water.

Perfect

Easy to apply, as directed (although I did dispose of the [cheap] paintbrush afterwards, rather than trying to clean it). Covers and adheres well, and four coats easily managed in 6-8 hours. Didn't find the smell a problem. Inherited an old, defunct waterfall, and fitted new pump and pipework, and re-cemented loose stones, but still some leakage. After application of G4, and requisite curing time, I am pleased to say that the watercourse is now working well, with no water loss apart from expected evaporation. Dries on the stone with a shiny, 'wetlook'. During application, a little of the product dribbled into the reservoir, but laid as a film on the water surface. Easily removed, rather like a piece of used clingfilm!