---
product_id: 23334333
title: "Underwater Sealant, 290 ml, Black | Aquarium, Pond Liner Sealer, Bonds and Seals Leaks Underwater"
brand: "gold label"
price: "€ 110.15"
currency: EUR
in_stock: true
reviews_count: 13
category: "Gold Label"
url: https://www.desertcart.hr/products/23334333-underwater-sealant-290-ml-black-aquarium-pond-liner-sealer-bonds
store_origin: HR
region: Croatia
---

# Fish-safe formula Instant underwater cure Bonds all surfaces Underwater Sealant, 290 ml, Black | Aquarium, Pond Liner Sealer, Bonds and Seals Leaks Underwater

**Brand:** gold label
**Price:** € 110.15
**Availability:** ✅ In Stock

## Summary

> 💧 Seal it like a pro—underwater, fish-friendly, and foolproof!

## Quick Answers

- **What is this?** Underwater Sealant, 290 ml, Black | Aquarium, Pond Liner Sealer, Bonds and Seals Leaks Underwater by gold label
- **How much does it cost?** € 110.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/23334333-underwater-sealant-290-ml-black-aquarium-pond-liner-sealer-bonds)

## Best For

- gold label enthusiasts

## Why This Product

- Trusted gold label brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Friendly & Safe:** Solvent & isocyanate free, ensuring no harm to aquatic life or your environment
- • **Compact & Convenient:** 290 ml gel paste in a sleek, easy-to-handle tube for precise application
- • **Universal Bonding Power:** Adheres strongly to vinyl, glass, ceramic, concrete, and more for versatile use
- • **Instant Underwater Repair:** Cures seamlessly underwater for quick fixes without drying delays
- • **Trusted by Pros & Hobbyists:** Highly rated with 4.3 stars from 873 reviews, a go-to for pond and aquarium maintenance

## Overview

Gold Label Underwater Sealant is a 290 ml black silicone gel designed for instant, waterproof repairs underwater. Its solvent- and isocyanate-free formula is safe for fish and bonds a wide range of materials including vinyl, glass, and concrete. Compact and easy to apply, it’s a trusted choice for pond and aquarium sealing with strong customer approval.

## Description

Gold Label Underwater Sealant 290ml black

Review: gold - stuff is legit
Review: Awesome product … wear latex gloves - Works well and cures underwater… fish in tank weren’t harmed. I recommend using latex gloves because if you get this on your finger it will be all over your body before you know it.. lol

## Features

- Pond and Aquarium Sealer
- Fish safe sealer that can be used underwater for instant repairs
- Solvent & Isocyanate Free
- Bonds all surfaces
- Ideal for Butyl Rubber, Vinyl, Glass, Plastic, Ceramic, Stone, Concrete and more

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0038LYLN0 |
| Best Sellers Rank | #103,569 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #75 in Water Garden & Pond Liners & Seals |
| Brand | Gold Label |
| Brand Name | Gold Label |
| Color | Black |
| Compatible Material | Vinyl |
| Customer Reviews | 4.3 out of 5 stars 873 Reviews |
| Global Trade Identification Number | 05060159850036 |
| Included Components | Huttons Gold Label Black Pond Sealant 290ml or 9.5 Fl Oz |
| Item Dimensions | 1.97 x 1.97 x 9.45 inches |
| Item Form | Gel, Paste |
| Item Type Name | Gold Label Black Pond Sealant 290ml or 9.5 Fl Oz Water Garden Koi Fish Pond and Aquarium Sealant |
| Item Weight | 0.5 kg |
| Item dimensions L x W x H | 1.97 x 1.97 x 9.45 inches |
| Manufacturer | Gold Label |
| Material | Silicone |
| Material Type | Silicone |
| Model | S30 |
| Number of Items | 1 |
| Part Number | S30 |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Countertop, Door, Pipe, Tile, Window |
| Unit Count | 9.81 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Gold Label
- **Item Weight:** 0.5 Kilograms
- **Item dimensions L x W x H:** 1.97 x 1.97 x 9.45 inches
- **Material:** Silicone
- **Style:** Compact

## Images

![Underwater Sealant, 290 ml, Black | Aquarium, Pond Liner Sealer, Bonds and Seals Leaks Underwater - Image 1](https://m.media-amazon.com/images/I/61vlIhl9gcL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ gold
*by J***N on December 10, 2025*

stuff is legit

### ⭐⭐⭐⭐⭐ Awesome product … wear latex gloves
*by B***L on August 9, 2024*

Works well and cures underwater… fish in tank weren’t harmed. I recommend using latex gloves because if you get this on your finger it will be all over your body before you know it.. lol

### ⭐⭐⭐⭐ Initial Feedback
*by R***S on September 7, 2023*

It is too early to comment on how well this product fixes the leaks on my backyard pond as It is only 2 days post installation. I’m commenting now to help others as they consider this product who may be concerned about multiple reviews stating how messy this product is. This was a concern as I considered the pros and cons of the purchase. This product is no more or less messy than any type of adhesive caulking I have ever installed. Of course if you are not careful it can be a problem. Simply take your time to get the nozzle cut to the volume you want to apply and then run your bead accordingly. I found the info online adequate to understand how to prep and apply the product. If the product performs as specified I wil change the review to 5 stars.

## Frequently Bought Together

- Gold Label Underwater Sealant, 290 ml, Black
- TotalPond Waterfall Foam Sealant
- GREAT STUFF 99112849 Smart Dispenser Pond & Stone, 12 oz, Black

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**Shop now:** [https://www.desertcart.hr/products/23334333-underwater-sealant-290-ml-black-aquarium-pond-liner-sealer-bonds](https://www.desertcart.hr/products/23334333-underwater-sealant-290-ml-black-aquarium-pond-liner-sealer-bonds)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-10*