---
product_id: 725604801
title: "Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear)"
brand: "wacker"
price: "102.83 DT"
currency: TND
in_stock: true
category: "Wacker"
url: https://www.desertcart.tn/products/725604801-wacker-121-professional-aquarium-fish-tank-silicone-sealant-small-to
store_origin: TN
region: Tunisia
---

# 100% waterproof & water resistant 360 lbs tensile strength Fast curing speed Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear)

**Brand:** wacker
**Price:** 102.83 DT
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal your aquarium like a pro—strong, safe, and sleek!

## Quick Answers

- **What is this?** Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear) by wacker
- **How much does it cost?** 102.83 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/725604801-wacker-121-professional-aquarium-fish-tank-silicone-sealant-small-to)

## Best For

- wacker enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Application:** Ideal for glass, plastics, ceramics, and more—seals gaps and repairs with precision.
- • **Odorless & Easy to Use:** Smooth, clean application for professional-grade results without the harsh chemical smell.
- • **Fish-Safe & FDA Approved:** Non-toxic formula ensures a safe, healthy environment for your aquatic life.
- • **Long-Term Water Resistance:** Resists cracking, shrinking, and yellowing even under constant water pressure.
- • **Unmatched Aquarium Bonding Power:** Engineered in Germany for superior strength and durability, perfect for tanks of all sizes.

## Overview

Wacker 121 is a premium-grade, FDA-approved silicone sealant designed specifically for aquarium construction and repair. With 360 lbs tensile strength, fast curing, and exceptional waterproofing, it guarantees a durable, fish-safe seal for tanks ranging from small to monster-sized. Trusted by professionals for over 20 years, it offers odorless, versatile bonding for glass and other materials, ensuring your aquatic environment stays secure and pristine.

## Description

For over two decades, aquarium professionals have trusted Wacker 121 to securely seal monster-sized aquarium glasses. This high-performance silicone sealant provides unbeatable adhesion, ensuring a watertight and durable bond for large custom aquariums. Ideal for both freshwater and saltwater setups, Wacker 121 is formulated to resist cracking, shrinking, and yellowing over time, even under constant water pressure. - *Superior Strength:* Designed to withstand extreme aquarium sizes and volumes. - *Reliable & Long-lasting:* Decades of proven use in professional aquarium setups. - *Safe for Aquatic Life:* Non-toxic, fully aquarium-safe once cured. - *Easy Application:* Smooth application for clean, precise seals.

## Features

- ✔️ PREMIUM GRADE ---> Made in Germany, Wacker 121 is a high performance silicone sealant designed for strong Bonding, Gap Filling & Repair of aquarium tanks, fish tanks and other glazing applications. Suitable for small to large size tank construction.
- ✔️ FDA APPROVED ---> FDA approved for fish and other aquatic animals. No toxins in it, safe and fish friendly.
- ✔️ FEATURES & BENEFITS ---> Excellent Long-term water resistance *★* Suitable for glass, plastics, ceramic products, and more *★* High strength, high toughness, high viscosity *★* Fast curing speed *★* Suitable for objects under water pressure *★* Excellent mechanical properties *★* Usage for wide variety of Glazing & Industrial applications
- ✔️ ENVIRONMENTAL ✔️ ODORLESS ✔️ WATERPROOF ✔️ HIGH-QUALITY

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08KGVHJJ8 |
| Best Sellers Rank | #35,667 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #99 in Silicone Sealers |
| Brand Name | Wacker |
| Color | Clear/Transparent |
| Compatible Material | Glass |
| Container Type | Tube |
| Customer Reviews | 4.3 4.3 out of 5 stars (400) |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Weight | 420 Grams |
| Manufacturer | Wacker |
| Material Type | Silicone |
| Model | WCK121 |
| Other Special Features of the Product | Non Toxic, Strong |
| Part Number | WCK121 |
| Specific Uses For Product | Aquarium |
| Tensile Strength | 360 Pounds |
| Unit Count | 310 Milliliters |
| Viscosity Level | High |
| Volume | 310 Milliliters |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Wacker
- **Item form:** Paste
- **Material:** Silicone
- **Special features:** Non Toxic, Strong
- **Specific uses for product:** Aquarium

## Images

![Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear) - Image 1](https://m.media-amazon.com/images/I/21Qhq5Hrm9L.jpg)
![Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear) - Image 2](https://m.media-amazon.com/images/I/31CKsAraW0L.jpg)
![Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear) - Image 3](https://m.media-amazon.com/images/I/613gvPZhUCL.jpg)
![Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear) - Image 4](https://m.media-amazon.com/images/I/41nBs4238rL.jpg)
![Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear) - Image 5](https://m.media-amazon.com/images/I/410-A9QCDCL.jpg)

## Frequently Bought Together

- Wacker 121 Professional Aquarium, Fish Tank Silicone Sealant | Small to Large Tanks | Bonding, Gap Filling & Repair | Safe for Fish (310ml - Clear)
- BIONIX Freshwater Master Test Kit (200 Test).

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-26*