Will this work to seal a few small holes in a black pond liner? The holes are on a horizontal planting shelf.

I would recommend firestone primer, seam tape and cover tape instead for the right way to patch holes in 45 mil epdm rubber.

We wouldn’t recommend it. The silicone is for sealing liner to faceplates with screws and any plumbing parts that are threaded and might need extra sealing. It can also be used in place of Teflon tape. The Pond Company

Can i build a new aquarium with this?

Yes, I think clear would be more aesthetically pleasing but this should work for a glass aquarium. I wouldn't use it for acrylic.

Will this work to seal around a Rubbermaid 100 gallon horse trough—around the rectangular piece of the bulkhead? No leak from threads

I have a 3500 Gallon Koi Pond and it sealed a couple of leaks I had in my liner very well. I was losing about 6 inches of water a day and once I found the tears in my liner I applied the sealant around the tear and pushed it into place. It has bee holding water without leaking for several weeks now so I'm thinking yes, it will hold in your application. It goes on very wet but seals to a hard surface. Good Luck.

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Aquascape Black Silicone Sealant, Safe for Fish, 10.1-ounce |29186

Aquascape Black Silicone Sealant, Safe for Fish, 10.1-ounce |29186

Product ID: 292071960

Details

Brand
Aquascape
Item dimensions L x W x H
5.1 x 5.1 x
Item weight
363 g
Material
Silicone
Style
Compact

🌞UV resistant for long-lasting durability

🐟100% safe for fish and wildlife

💧100% waterproof sealant

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MOP$410

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Description

🐠 Seal smart, seal safe — the black silicone that keeps your aquatic world flawless!

ECO FRIENDLY FISH SAFE - Formulated to protect aquatic life while meeting Green Building Standards.
BUILT TO BRAVE THE ELEMENTS - UV resistant and temperature tough for all-weather, outdoor or indoor use.
ULTIMATE WATERPROOF PROTECTION - Seals ponds, aquariums, and water features with airtight, leak-proof bonds.
VERSATILE SURFACE COMPATIBILITY - Bonds seamlessly to metal, tile, glass, wood, and more for endless DIY possibilities.
LONG SHELF LIFE RELIABLE QUALITY - 10.1-ounce tube with a 24-month shelf life ensures you’re always ready for your next project.

Aquascape Black Silicone Sealant 29186 is a premium, waterproof, UV-resistant sealant designed for both indoor and outdoor use. Safe for fish and wildlife, it forms durable, airtight bonds on a wide range of surfaces including metal, tile, glass, and wood. This eco-conscious, VOC-compliant formula meets Green Building Standards and offers a 24-month shelf life, making it the go-to choice for pond liners, aquariums, terrariums, and versatile repair projects.

Specifications

ASIN	B000N1AMY0
Brand Name	Aquascape
Color	Black
Compatible Material	Metal
Customer Reviews	4.6 4.6 out of 5 stars (2,139)
Global Trade Identification Number	00827807291864
Item Dimensions	5.1 x 5.1 x 27.9 centimeters
Item Form	Liquid
Item Type Name	Safe for Fish and Plants
Item Weight	363 g
Manufacturer	Aquascape Designs, Inc
Material Type	Silicone
Model	29186
Number of Items	1
Part Number	29186
Style Name	Compact
Surface Recommendation	Tile
UPC	827807291864
Unit Count	10.1 Milliliters
Water Resistance Level	Waterproof

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