Liquid Rubber NeoPond Waterproof Pond Sealant, Fish/Plant Safe, 5 Gallon

I wanted to wait until I fully used this before I made a review, an di have to say that the experience is an overall positive one. Firstly, I ordered the wrong product, initially. A quick call to the manufacturer and some guidance about my project steered me in the proper direction. I have a homemade concrete waterfall, covered with thoroseal, that runs into my koi pond, and it cracked over time. Repairing the cracks every spring was getting boring. Prepping the old, dirty surface via a wire wheel and some etching compound, then covering it with 2 coats of the primer made for an easy application. I applied with a chip brush, and the first coat took a long time, the following 3 coats much easier as I was going over half-cured rubber instead of concrete. Due to the weather and my work schedule, I had to apply 1 coat roughly every day, with the final 2 on a Sunday (my only day off work). After letting it fully cure for 5 days, the rubber coating has adhered well, is thick and smooth, and the waterfall is happily churning away, which makes my koi happy. The one-gallon bucket I purchased easily coated my roughly 25-square foot waterfall for several layers, giving me at least a 30-mil thickness with lots of flex. If you follow the instructions, you shouldn't have any difficulties.

If you buy this product, you will be sorry. I took extreme care cleaning and preparing my 1000 gallon masonry pond. Used acid etch, scrubbed the surface, powerwashed and dried for three days. I applied the Beest primer which adhered extremely well. I allowed the primer to cure for a few hours, then applied four coats of the Neopond rubber pond sealant. I waited a day between coats and let the whole thing cure for another five days. It looked perfect. I filled, then drained the pond as recommended. I refilled the pond, and bout two weeks later, I noticed a single, quarter sized bubble had formed. No worries. Two weeks after that, I checked the pond and there were thousands of quarter sized bubbles. No leaks, mind you, but the bubbles had stretched the membrane which broke the seal between the primer and Neopond sealant. What a disaster. I've been spending the last few days using a diamond cup grinder to remove every last speck of primer and sealant. I will use an epoxy product. Never again Neopond. I should have listened to the other reviews.

Outstanding product . I have a pool liner as a pond liner so when I put a hole in it chipping ice I used this and walla no more leak . Put another hole chipping ice again last winter so I will have to clean weed and plant and drain to patch but fully expect another no leak experience. Just wish it came in white . Works so well I used it to seal the seams on porch roof . Drys fast and application is pretty easy.

had to fix a leak in my concrete pond and it works great. Looks very nice. Goes on easy. We’ll see how long it lasts.

Used this to seal a home made 4x2x2 for our baby boa. Sealer works great just know the cure time takes a while. It tacked up fairly fast, but of gassed for maybe a month and a half. Smell went away but just know it takes time. P.s. if you apply sand while wet it adds great texture for your critters.

Works better instead of of the flex seal

I was really needing a solution to the leak we had in our small water fountain pond and our backyard. Other items like flex seal did not work so we purchased the liquid rubber neon pond waterproof item. I wanted to ensure there wasn't going to be any issues with leaking so I put four coats of it on waiting each time between layers. It didn't work and the pond when it filled up still would end up leaking and now after 8 months I noticed that it is peeling off of the pond surface. So disappointing considering how much it cost.

I was hopeful, but this product performed poorly. I was using it to seal a galvanized steel tank to make an outdoor pond. It bubbled up within days, didnt stick, and even had rust coming through. I had some leftover so I tried a second time with the same result. I didnt use a primer. Maybe that would have helped.

This product is very easy to apply. I brushed it onto a cement pond that was leaking and crumbling. Brushed it clean first then brushed it on. Was dry enough for recoat by the time the first coat was completed. The pond held water soon after.

Terrible product. Followed manufacturer’s instructions for application and curing time and it still peeled off within days.

I have an old fiberglass fish pond, 16' x 10' x 2.5'. It had many problems holding water so I used spray foam for the while thing and once cured, painted the whole surface with two coats or more. Pond no longer leaks.

Messy but seems to work

Creates a rubbery layer suitable for stocked ponds. I’d suggest a primer coat. I thought it would soak into concrete but it doesn’t. It has formed a membrane layer on top of the concrete much like spraying 5-6 layers of plasti-dip. So far it has help up as a pond liner.