---
product_id: 52605808
title: "Dow Corning Silicone Rubber Aquarium Sealant 00688"
brand: "dap"
price: "€ 28.94"
currency: EUR
in_stock: true
url: https://www.desertcart.ie/products/52605808-dow-corning-silicone-rubber-aquarium-sealant-00688
store_origin: IE
region: Ireland
---

# aquarium-safe for fish 100% waterproof seal FDA food-safe certified Dow Corning Silicone Rubber Aquarium Sealant 00688

**Brand:** dap
**Price:** € 28.94
**Availability:** ✅ In Stock

## Summary

> 💧 Seal it right, seal it tight—your projects deserve the best!

## Quick Answers

- **What is this?** Dow Corning Silicone Rubber Aquarium Sealant 00688 by dap
- **How much does it cost?** € 28.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/52605808-dow-corning-silicone-rubber-aquarium-sealant-00688)

## Best For

- dap enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Quick Fix:** Perfect for household repairs, crafts, and even dishwasher-safe applications.
- • **Compact & Ready-to-Use:** 2.8 oz size designed for precision and fast, mess-free projects.
- • **Aquarium-Approved Sealant:** Harmless to both freshwater and saltwater fish once cured.
- • **Certified Food-Safe Formula:** Meets FDA standards for incidental food contact—safe and reliable.
- • **Unbreakable Waterproof Bond:** Creates a flexible, crack- and shrink-resistant seal that lasts.

## Overview

DAP Dow Corning Silicone Rubber Aquarium Sealant 00688 is a premium 100% silicone adhesive designed for durable, flexible, and waterproof sealing. It meets ASTM C920 Class 25 standards and FDA regulations for incidental food contact, making it safe for household, aquarium, and food-related applications. This compact, clear sealant resists cracking and shrinking, is dishwasher and microwave safe, and is harmless to aquatic life once cured.

## Description

Dap Dow Corning Silicone Rubber Aquarium Sealant 00688

## Features

- DAP All Purpose 100% Silicone Adhesive Sealant Long-lasting, 100% silicone rubber is ideal for quick household repairs and projects. Forms a strong, waterproof seal. Won’t shrink or crack. Stays flexible. Safe for incidental food contact. Dishwasher and microwave safe. Also ideal for building or repairing aquariums. Harmless to fresh and saltwater fish when cured.
- Meets ASTM C920, Class 25; Forms a strong, waterproof seal.
- Flexible seal won’t crack or shrink.
- Safe for incidental food contact. When cured and washed, the product meets the requirements of FDA Regulation No. 21 CFR 177.2600.
- Dishwasher & microwave safe; Aquarium safe – harmless to fresh and saltwater fish when cured.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 9.53 x 3.81 x 21.59 cm; 72.57 g |
| Item model number | 7079800755 |
| Language: | English |
| Number of pieces | 1 |
| Batteries Required? | No |
| Batteries included? | No |
| Material Type(s) | Rubber |
| Colour | Clear |
| ASIN | B000KE4PBQ |

## Product Details

- **Brand:** DAP
- **Specific uses for product:** Aquarium Sealing, Crafts, Household Projects, Kitchen Projects, Repairing Ceramics
- **Material:** Rubber
- **Item form:** Paste
- **Special feature:** Waterproof

## Images

![Dow Corning Silicone Rubber Aquarium Sealant 00688 - Image 1](https://m.media-amazon.com/images/I/61UFo5DQdUL.jpg)

## Questions & Answers

**Q: What are the temperature specifications ? Can I use this close to a heating element submerged in water once it dried ?**
A: I used it to seal the outside of the heating element on my dishwasher... the flange wouldn’t make a complete seal around the outside, so it leaked water. Still working great after several months.

**Q: I have a tube of this. Can I use it to install a bathroom sink?**
A: It is not like other silicone used in bathroom/shower installs. One specific difference is that those bathroom/shower silicones contain anti-microbial protection against mold & mildew. 
This is a food grade safe silicone, so those anti-microbial additives aren’t included in this formula. Also, it takes 72 hours to cure properly.

**Q: I'm interested in using this to repair a Chemex coffee maker. Crack is near the top. My concerns are about the heat  and about food safety. Thoughts?**
A: Nothing other than a talented glass blower can fix a Chemex glass coffee filter cone. A crack in the borosilicate glass will grow under the stress of thermal expansion. In theory you can pre-heat the entire piece and repair the area and anneal and cool the piece, in practice it would cost much more to pay someone to do that than to buy a new Chemex. It’s an ,aesthetically pleasing way to make coffee, but you have to make peace with the idea that It requires exceptionally careful handling to achieve an average working life of 2 years In daily use. There are many other cone type coffee filter coffee makers that produce coffee quite well if you lose interest in the aesthetic experience.

**Q: how do i clean out the plastic long applicator so i can reuse it? i don't want sealant to dry in there and clog it, rendering the applicator useless.**
A: I have had no problem with the product drying in the nozzle.  At most I had to pick put the very tip, the rest stays wet enough to flow again when pressure is applied to the tube.  I used a strong toothpick or a shishkebob stick to get a dry plug out if that happened.  But 9 out of 10 ten uses it did not clog.

## Frequently Bought Together

- Dap 00688 All-Purpose Adhesive Sealant, 100% Silicone, 2.8-Ounce Tube
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-01*