---
product_id: 48209530
title: "Underwater Sealant, 290 ml, Black"
brand: "gold label"
price: "฿3864"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/48209530-underwater-sealant-290-ml-black
store_origin: TH
region: Thailand
---

# Instant underwater bonding Bonds all surfaces Solvent & isocyanate free Underwater Sealant, 290 ml, Black

**Brand:** gold label
**Price:** ฿3864
**Availability:** ✅ In Stock

## Summary

> 💧 Seal it once, seal it right—underwater magic in a tube!

## Quick Answers

- **What is this?** Underwater Sealant, 290 ml, Black by gold label
- **How much does it cost?** ฿3864 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/48209530-underwater-sealant-290-ml-black)

## 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-Safe Formula:** Solvent and isocyanate free, ensuring a fish-safe, non-toxic seal for aquatic environments.
- • **Durable & Waterproof:** Provides a long-lasting, waterproof barrier that withstands pressure and moisture for ultimate reliability.
- • **Compact & Ready-to-Use:** 290 ml liquid form in a sleek, easy-to-apply package—ideal for quick fixes and professional projects alike.
- • **Instant Underwater Repair:** Seals leaks and cracks underwater without drying time—perfect for pond and aquarium emergencies.
- • **Universal Surface Compatibility:** Bonds seamlessly to vinyl, glass, ceramic, plastic, stone, concrete, and more—one sealant to rule them all.

## Overview

Gold Label Underwater Sealant is a 290 ml black liquid sealant designed for instant, waterproof repairs underwater. It is solvent and isocyanate free, making it safe for fish and aquatic environments. This versatile sealant bonds to a wide range of materials including vinyl, glass, ceramic, plastic, stone, and concrete, providing a durable, long-lasting seal ideal for ponds, aquariums, and other wet surfaces.

## Description

Product Description Gold Label Underwater Sealant 290ml black Box Contains Gold Label Underwater Sealant 290ml black

## Features

- Contains sensitizing substances. May produce an allergic reaction.
- 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 | 12,107 in Garden ( See Top 100 in Garden ) 950 in Garden Décor |
| Brand | Gold Label |
| Colour | Black |
| Compatible Material | Vinyl, Glass, Ceramic, Plastic |
| Customer Reviews | 4.4 4.4 out of 5 stars (905) |
| Global Trade Identification Number | 05060159850036 |
| Item Dimensions | 50 x 50 x 240 millimetres |
| Item Form | Liquid |
| Item Weight | 0.5 Kilograms |
| Manufacturer | Gold Label |
| Manufacturer Part Number | S30 |
| Material | Rubber |
| Model Number | S30 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Style Name | Compact |
| Surface Recommendation | Window, Tile, Pipe, Countertop, Door |
| Unit Count | 290.0 millilitre |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Gold Label
- **Item dimensions L x W x H:** 50 x 50 x 240 millimetres
- **Item weight:** 0.5 Kilograms
- **Material:** Rubber
- **Style:** Compact

## Images

![Underwater Sealant, 290 ml, Black - Image 1](https://m.media-amazon.com/images/I/61vlIhl9gcL.jpg)

## Questions & Answers

**Q: It says on your product Safety that it's " Harmful to aquatic life with long lasting effects." .I don't understand.**
A: No idea about it being harmful. I used it to join two bits of liner that is under an artificial bog.

**Q: I have a 6 inch hairline crack in my fibreglass fish pond, will this fix it?**
A: I haven’t used this product for that purpose but it is supposed to bond layers together and seal joints so may be worth a try.

**Q: Has anybody used it on a glass aquarium. I need to do an underwater repair with the tropical  fish still in the tank.**
A: It will seal underwater and is non toxic. I have used it in a pond. The tube I had was black sealant though.

**Q: Can gold label  underwear  sealantI have  a hole  at the bottom  of my fish pond  do i have  to completely  drain  my pond to fix the  leak**
A: On the container it states that the glue will work underwater, which implies that you don't have to drain the pond.  However, the instructions also tell you to remove all mud, silt and algae.  To do this you have to lower the water level until the damage is exposed so that you can clean up around it.

## 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.co.th/products/48209530-underwater-sealant-290-ml-black](https://www.desertcart.co.th/products/48209530-underwater-sealant-290-ml-black)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-08-25*