--- product_id: 42016620 title: "4500 Roof Bonding Sealant, 10 fl oz, Black" brand: "geocel" price: "R698" currency: ZAR in_stock: true reviews_count: 9 category: "Geocel" url: https://www.desertcart.co.za/products/42016620-4500-roof-bonding-sealant-10-fl-oz-black store_origin: ZA region: South Africa --- # Cures underwater Quick drying Multi-surface adhesion 4500 Roof Bonding Sealant, 10 fl oz, Black **Brand:** geocel **Price:** R698 **Availability:** ✅ In Stock ## Summary > 🛡️ Seal your roof like a pro—because leaks are so last season! ## Quick Answers - **What is this?** 4500 Roof Bonding Sealant, 10 fl oz, Black by geocel - **How much does it cost?** R698 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/42016620-4500-roof-bonding-sealant-10-fl-oz-black) ## Best For - geocel enthusiasts ## Why This Product - Trusted geocel brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Speedy Seal:** Fast skin-over time means your roof is protected sooner—no waiting around. - • **DIY Pro-Grade:** No extra adhesives needed; trusted by pros and serious DIYers for permanent, watertight repairs. - • **Universal Grip:** Adheres flawlessly to asphalt, metal, concrete, EPDM, and more—one sealant to rule them all. - • **Waterproof Wonder:** Cures and bonds even underwater for unbeatable leak protection. - • **Flexible Fortitude:** Remains flexible through temperature swings and UV exposure—no cracking, no shrinking. ## Overview Geocel 4500 Roof Bonding Sealant is a premium one-component Scypolymer designed for roofing applications. It uniquely applies, adheres, and cures underwater, dries quickly to resist ponding water, and bonds to a wide range of substrates including asphalt shingles, metal, concrete, and EPDM. Its flexible, non-flammable formula ensures durable, long-lasting repairs trusted by professionals since 1974. ## Description Geocel 4500 Roof Bonding Sealant is a premium Scypolymer one-component, proprietary bonding sealant specifically designed for roofing applications and systems. It applies, adheres, and cures underwater. The advanced technology of this bond sealant results in a product that quickly withstands ponding water while bonding to many common roofing substrates. This durable sealer is ideal for use on asphalt shingles, steel, concrete, EPDM, primed TPO, primed PVC, Hypalon (black only), metal, wood, and other common building substrates. No additional adhesives or sealants are needed when you use this flexible sealer. It has a non-flammable formulation and works with EPDM membranes, tapes, and patches. It can also be used as a night seal and for core/test cuts. Founded in 1974, the Geocel brand provides innovative, specially designed sealants. Quality is a key ingredient in every Geocel product and service offered, which is why professionals have come to trust and depend on Geocel products. Review: Can't go wrong - ⭐️⭐️⭐️⭐️⭐️ The Gold Standard for Roof Repairs—Worth Every Penny! ​I bought the GEOCEL GC55103 4500 Roof Bonding to finally tackle a persistent, slow leak around a chimney flashing that I had failed to fix with three different big-box store sealants. This product is in a league of its own, and the five-star rating is absolutely earned. ​Application: The sealant is thick, but it flows exactly where you need it to go. I applied it easily using a standard caulking gun. The self-leveling property is fantastic; it beautifully filled small voids and gaps around the flashing without me having to tool it much. It adheres immediately to everything—metal, asphalt shingle, and masonry. ​Performance & Cure: I applied this on a cool afternoon, and it skinned over quickly. The truly amazing part is its performance. The leak I've been fighting for months? Completely gone after the first rain. It remains flexible and has handled the recent temperature fluctuations and strong UV exposure with zero sign of cracking, shrinking, or lifting. It truly creates a permanent, watertight membrane. ​Final Verdict: If you are dealing with a tough leak on your roof (especially around vents, skylights, or flashings), stop wasting money on cheap sealants. The GEOCEL 4500 is professional-grade and provides the peace of mind that the job is done right. It bonds fiercely and forms a flexible, durable repair that looks like it will last longer than the roof itself. Highly, highly recommended for serious DIYers and professionals alike! Review: The best sealant to to ever come out of a tube! - I've used many different sealants and this is the best by far. The consistency is a little thicker than most, but smooth. It's very trowelable and fills voids well. Setting time is a little on the fast side which is preferable in most cases. It cures to a very solid yet semi-flexible mass that reminds me of the better rubber creating products. Adhesion is strong on a wide range of surfaces. Geocell should consider offering it in a 64 oz tub for use in troweling setting beds for flashing work. Add the ability to use it under water and you have sealant paradise! ## Features - POLY SEALANT – Geocel 4500 Roof Bonding Sealant is a premium Scypolymer one-component, proprietary bonding sealant specifically designed for roofing applications and systems. It applies, adheres, and cures underwater. - QUICK DRYING – The advanced technology of this bonding sealer results in a product that quickly withstands ponding water while bonding to many common roofing substrates. - IDEAL FOR – This durable sealant is ideal for use on asphalt shingles, steel, concrete, EPDM, primed TPO, primed PVC, Hypalon (black only), metal, wood, and other common building substrates. - EASY TO USE – No additional adhesives or sealants are needed when you use this flexible sealant. It has a non-flammable formulation and works with EPDM membranes, tapes, and patches. It can also be used as a night seal and for core/test cuts. - GEOCEL – Founded in 1974, the Geocel brand provides innovative, specially designed sealants. Quality is a key ingredient in every Geocel product and service offered, which is why professionals have come to trust and depend on Geocel products. ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.7 out of 5 stars 654 Reviews | ## Product Details - **Brand:** Geocel - **Color:** Black - **Item Form:** Liquid - **Item Weight:** 1 Pounds - **Liquid Volume:** 10.1 Fluid Ounces ## Images ![4500 Roof Bonding Sealant, 10 fl oz, Black - Image 1](https://m.media-amazon.com/images/I/417eiD7jL1L.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: Why does the front of the bottle say it bonds to epdm, but under limitations its says it is not for use with white or black epdm?** A: Please read the label more carefully: no black sealant on white EPDM, no white sealant on black. In other words, use black sealant only on black material, white only on white. **Q: Want to use under a white epdm roof to adhere to new plywood - any problem using this black adhesive? thank you.** A: Worked fine for me. Roof was peeling back from wind and this held as a repair; press down epdm after application while it cures. Then covered edge with self leveling white lap sealant. **Q: what is the difference with this and the 2300?** A: The 2300 i have used is more runny and sticks to everything to include bronze and stainless. **Q: Can this product be applied to pond liner to glue onto another piece of liner? Would it be harmful to fish?** A: That's exactly what I did, nothing changed with the comets or Shubunkins. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Can't go wrong *by R***I on November 20, 2025* ⭐️⭐️⭐️⭐️⭐️ The Gold Standard for Roof Repairs—Worth Every Penny! ​I bought the GEOCEL GC55103 4500 Roof Bonding to finally tackle a persistent, slow leak around a chimney flashing that I had failed to fix with three different big-box store sealants. This product is in a league of its own, and the five-star rating is absolutely earned. ​Application: The sealant is thick, but it flows exactly where you need it to go. I applied it easily using a standard caulking gun. The self-leveling property is fantastic; it beautifully filled small voids and gaps around the flashing without me having to tool it much. It adheres immediately to everything—metal, asphalt shingle, and masonry. ​Performance & Cure: I applied this on a cool afternoon, and it skinned over quickly. The truly amazing part is its performance. The leak I've been fighting for months? Completely gone after the first rain. It remains flexible and has handled the recent temperature fluctuations and strong UV exposure with zero sign of cracking, shrinking, or lifting. It truly creates a permanent, watertight membrane. ​Final Verdict: If you are dealing with a tough leak on your roof (especially around vents, skylights, or flashings), stop wasting money on cheap sealants. The GEOCEL 4500 is professional-grade and provides the peace of mind that the job is done right. It bonds fiercely and forms a flexible, durable repair that looks like it will last longer than the roof itself. Highly, highly recommended for serious DIYers and professionals alike! ### ⭐⭐⭐⭐⭐ The best sealant to to ever come out of a tube! *by T***P on June 27, 2026* I've used many different sealants and this is the best by far. The consistency is a little thicker than most, but smooth. It's very trowelable and fills voids well. Setting time is a little on the fast side which is preferable in most cases. It cures to a very solid yet semi-flexible mass that reminds me of the better rubber creating products. Adhesion is strong on a wide range of surfaces. Geocell should consider offering it in a 64 oz tub for use in troweling setting beds for flashing work. Add the ability to use it under water and you have sealant paradise! ### ⭐⭐⭐⭐⭐ Great product for multiple applications *by D***N on April 20, 2026* This stuff is amazing. I used it to seal roof nails and the seal the flashing. Dries quickly (can actually be used when it’s raining) and sealed everything up. Then I went camping and my RV had a leak. I remembered I had this in my truck. I put it on the spot I suspected was leaking in the pouring rain. The leak stopped immediately. I’m sold! Best stuff ever. ## Frequently Bought Together - GEOCEL GC55103 4500 Roof Bonding Sealant, 10 Ounce Cartridge, Black - Oatey Oatey-14137 14137 Rain Collar 3"-4" No-Calk Roof Flashing, 1 Count (Pack of 1), Black - Oatey 14136 Rain Collar 1.5"-3" No-Calk Roof Flashing, Black --- ## 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/42016620-4500-roof-bonding-sealant-10-fl-oz-black](https://www.desertcart.co.za/products/42016620-4500-roof-bonding-sealant-10-fl-oz-black) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-25*