--- product_id: 52605808 title: "Dow Corning Silicone Rubber Aquarium Sealant 00688" brand: "dap" price: "R761" currency: ZAR in_stock: true reviews_count: 8 category: "Dap" url: https://www.desertcart.co.za/products/52605808-dow-corning-silicone-rubber-aquarium-sealant-00688 store_origin: ZA region: South Africa --- # aquarium-safe for fish 100% waterproof seal FDA food-safe certified Dow Corning Silicone Rubber Aquarium Sealant 00688 **Brand:** dap **Price:** R761 **Availability:** ✅ In Stock ## Summary > 💧 Seal it once, seal it right — waterproof confidence for every project! ## Quick Answers - **What is this?** Dow Corning Silicone Rubber Aquarium Sealant 00688 by dap - **How much does it cost?** R761 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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 - • **Compact & Precise:** 2.8 oz tube designed for quick, mess-free repairs and crafts. - • **Aquarium-Ready Sealant:** Harmless to fresh and saltwater fish once fully cured. - • **Versatile Household Hero:** Ideal for sealing, repairing ceramics, dishwasher seals, tents, and more. - • **Certified Food-Safe Formula:** Meets FDA standards for incidental food contact—perfect for kitchen projects. - • **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 seals. FDA-approved for incidental food contact and safe for aquarium use, it’s perfect for professional-grade household repairs, crafts, and aquatic projects. Compact and easy to apply, it resists cracking and shrinking, ensuring long-lasting performance across a variety of surfaces. ## Description DAP All Purpose Adhesive Silicone Sealant is a durable, 100% silicone rubber sealant designed for a wide range of quick household repairs and projects. Designed for speed and precision, the compact 2.8 ounce size is ideal for quick touch-ups or smaller projects and repairs. Safe for both freshwater and saltwater fish once fully cured and a great choice to restore or build small aquariums. This sealant creates a flexible, 100% waterproof seal that resists cracking and shrinking, ensuring long-lasting performance. Meets ASTM C920, Class 25 standards and the requirements of FDA Regulation No. 21 CFR 177.2600, making it safe for incidental contact with food. Sealant works on interior and exterior applications and is dishwasher and microwave safe. Additional uses include repairing dishwasher seals, mending campers and tents, repairing porcelain, china, crystal, ceramics, jewelry and making crafts. DAP caulk and sealants provide durable performance for a variety of projects. DAP On the Go products provide the ability to seal, repair, bond and more without the waste. Review: Five Stars - Working ok, I still need to add a few layers Review: What for - I bought this a long time ago and I can't remember what for, but I do remember it did the job well. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | DAP | | Colour | Clear | | Item form | Paste | | Material | Rubber | | Special feature | Waterproof | | Specific uses for product | Aquarium Sealing, Crafts, Household Projects, Kitchen Projects, Repairing Ceramics | ## Product Details - **Brand:** DAP - **Item dimensions L x W x H:** 9.5 x 3.8 x 21.6 centimetres - **Item weight:** 73 g - **Material:** Rubber - **Style:** Tube ## Images ![Dow Corning Silicone Rubber Aquarium Sealant 00688 - Image 1](https://m.media-amazon.com/images/I/61UFo5DQdUL.jpg) ![Dow Corning Silicone Rubber Aquarium Sealant 00688 - Image 2](https://m.media-amazon.com/images/I/61lNTidDLTL.jpg) ![Dow Corning Silicone Rubber Aquarium Sealant 00688 - Image 3](https://m.media-amazon.com/images/I/71IFWur8ujL.jpg) ![Dow Corning Silicone Rubber Aquarium Sealant 00688 - Image 4](https://m.media-amazon.com/images/I/81CXvfqzlaL.jpg) ![Dow Corning Silicone Rubber Aquarium Sealant 00688 - Image 5](https://m.media-amazon.com/images/I/71nTEeskDpL.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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Five Stars *by T***7 on 1 September 2015* Working ok, I still need to add a few layers ### ⭐⭐⭐⭐ What for *by M***H on 27 September 2024* I bought this a long time ago and I can't remember what for, but I do remember it did the job well. ### ⭐⭐⭐⭐ All good so far *by J***9 on 8 September 2015* Used this to glue the washer to a jumper plate in a tap - the retaining screw at the base of the jumper plate had sheared off so nothing much was holding it in place. Seems to have done the job - tap is working well - only time will tell if it has staying power. ## Frequently Bought Together - Dap 00688 All-Purpose Adhesive Sealant, 100% Silicone, 2.8-Ounce Tube - Useekoo USB Aquarium Air Pump, Ultra Durable & Quiet USB Nano Air Pump, Small Air Bubbler for Aquarium Fish Tank with Air Stone and Silicone Tube - Sea-Monkeys® Instant Life - World's Only Instant Pets® - Ages 6+ (Pack of 1) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/52605808-dow-corning-silicone-rubber-aquarium-sealant-00688](https://www.desertcart.co.za/products/52605808-dow-corning-silicone-rubber-aquarium-sealant-00688) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-07*