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🚀 Seal smarter, not harder — the ultimate marine-grade fix for flawless water features!
MyPond MS300 Marine Sealant is a premium 300ml MS polymer adhesive that delivers 4x the strength of standard aquarium silicone. Waterproof and fast-curing underwater within 24 hours, it bonds securely to over 10 materials including concrete, glass, and metal. Its fish-safe formula ensures safe use in ponds, aquariums, and fountains, making it the go-to sealant for durable, professional-grade leak repairs and upgrades.
| ASIN | B0C2VBJ2BL |
| Best Sellers Rank | 1,676 in Garden ( See Top 100 in Garden ) 15 in Pond Care & Water Treatment |
| Brand | MyPond |
| Compatible Material | Concrete, Stone, Wood, Glass, Metal, Rubber, Plastic, Fiberglass, Acrylic, Glass Reinforced Plastic, Porcelain, Vinyl, StoneConcrete, Stone, Wood, Glass, Metal, Rubber, Plastic, Fiberglass, Acrylic, Glass Reinforced Plastic, Porcelain, Vinyl, Stone |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.3 4.3 out of 5 stars (301) |
| Item Form | Liquid |
| Manufacturer | MyPond |
| Manufacturer Part Number | Ms-300 |
| Number of Items | 1 |
| Style Name | Compact |
| Surface Recommendation | Window |
| Unit Count | 300.0 millilitre(s) |
| Water Resistance Level | Waterproof |
J**N
Good product just price bit high
Good product
G**A
Very good, very messy
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.
S**S
Excellent for pond liner repairs
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.
B**T
it works- so far
Worked just as it was supposed on first use.
R**R
Did the job!
Easy to apply, Nice & sticky (wet finger before touching) and invisible on black liner. Most importantly, pond no longer leaks!! Would definitely recommend
M**L
Doesn't work with preformed pond liners
Seams like decent stuff, but would not adhere to a pond liner and concrete seam and had all fallen off by the following day.
A**R
Sealant
As described
M**M
Seals great
Good product
J**K
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.
J**N
Other than only available in black, this is an excellent sealant.
K**.
The item did not come with the screw on nozzle
E**.
Arrived with no top. Several other reviews mention same issue.
B**T
Arrived with no nozzle
Trustpilot
3 days ago
3 weeks ago