---
product_id: 42016620
title: "GEOCEL GC55103 4500 Roof Bonding Sealant, 10 Ounce Cartridge, Black"
brand: "geocel"
price: "€ 27.74"
currency: EUR
in_stock: true
reviews_count: 8
category: "Geocel"
url: https://www.desertcart.gr/products/42016620-geocel-gc55103-4500-roof-bonding-sealant-10-ounce-cartridge-black
store_origin: GR
region: Greece
---

# Quick drying & ponding water resistant Cures underwater Bonds 10+ roofing substrates GEOCEL GC55103 4500 Roof Bonding Sealant, 10 Ounce Cartridge, Black

**Brand:** geocel
**Price:** € 27.74
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal like a pro, rain or shine—roof repairs that won’t quit!

## Quick Answers

- **What is this?** GEOCEL GC55103 4500 Roof Bonding Sealant, 10 Ounce Cartridge, Black by geocel
- **How much does it cost?** € 27.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/42016620-geocel-gc55103-4500-roof-bonding-sealant-10-ounce-cartridge-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

- • **Pro-Grade Durability:** 200 PSI tensile strength ensures a long-lasting, crack-resistant seal.
- • **Rapid Rain-Ready Drying:** Withstands ponding water fast, so repairs hold immediately.
- • **One-Step, No Extras Needed:** Flexible, non-flammable formula eliminates need for additional adhesives.
- • **Unstoppable Underwater Cure:** Seals and sets even when wet—no weather delays!
- • **Universal Roof Compatibility:** Works flawlessly on asphalt, metal, concrete, EPDM, and more.

## Overview

Geocel 4500 Roof Bonding Sealant is a premium one-component Scypolymer designed for professional-grade roofing repairs. It uniquely applies, adheres, and cures underwater, dries quickly to resist ponding water, and bonds securely to a wide range of roofing materials including asphalt shingles, metal, concrete, and EPDM. Its flexible, non-flammable formula eliminates the need for extra adhesives, delivering a durable, waterproof seal with 200 PSI tensile strength trusted by pros 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: Works The First Time - Needed to seal down some architectural shingles that got lifted in an 80 mph wind shear. I was luckier than most, my shingles didn't tear or break. In the past, I had mixed results with cheap asphalt repair products. They all instructed laying a house brick on the repair overnight. I had numerous repairs , so that wasn't an option. Besides, who wants to go back up on a 25 foot roof the next day to see if it worked or carry 30 bricks up there. A friend that works as a roofing contractor recommended this Geocel 4500. He said to wait for a sunny day and just hold the repair down with my hand for about a minute. He laughed about the house brick thing. This stuff is the real deal. I treated it like contact adhesive. Apply it to the surface, press it down, pull it apart slightly, then put your weight on it to seal it down. This stuff sticks! Did all the lifted shingles in about 45 minutes. I wore an old pair of mechanic's gloves and just threw them out when done. It's pretty unforgiving if you get it on you . Had another storm roll through a couple days later and every repair held firm. Only 45 mph wind this time, but they held. I didnt have any problem with hardening in the tube. I must've got a fresh batch. I set it in the sun on an asphalt driveway for a couple of hours before I started. It was nice and pliable on a 75 degree day. This worked as advertised.

## 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 |
|---------------|-------|
| ASIN | B002ELU1HU |
| Best Sellers Rank | #5,408 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #15 in Adhesive Caulk |
| Brand | Geocel |
| Brand Name | Geocel |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 540 Reviews |
| Global Trade Identification Number | 00079239551034 |
| Included Components | Geocel 4500 Roof Bonding Sealant, Black, 10.3 fl. oz. |
| Item Form | Liquid |
| Item Type Name | GC55103 |
| Item Weight | 16 ounces |
| Liquid Volume | 10.1 Fluid Ounces |
| Manufacturer | Geocel |
| Material Type | Blend |
| Surface Recommendation | Roof |
| Tensile Strength | 200 Pounds Per Square Inch |
| UPC | 079239551034 |
| Unit Count | 1.0 Count |
| Warranty Description | Satisfaction Guaranteed |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Geocel
- **Color:** Black
- **Item Form:** Liquid
- **Item Weight:** 16 ounces
- **Liquid Volume:** 10.1 Fluid Ounces

## Images

![GEOCEL GC55103 4500 Roof Bonding Sealant, 10 Ounce Cartridge, Black - Image 1](https://m.media-amazon.com/images/I/510-+wwu2iL.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!

### ⭐⭐⭐⭐⭐ Works The First Time
*by A***. on May 25, 2024*

Needed to seal down some architectural shingles that got lifted in an 80 mph wind shear. I was luckier than most, my shingles didn't tear or break. In the past, I had mixed results with cheap asphalt repair products. They all instructed laying a house brick on the repair overnight. I had numerous repairs , so that wasn't an option. Besides, who wants to go back up on a 25 foot roof the next day to see if it worked or carry 30 bricks up there. A friend that works as a roofing contractor recommended this Geocel 4500. He said to wait for a sunny day and just hold the repair down with my hand for about a minute. He laughed about the house brick thing. This stuff is the real deal. I treated it like contact adhesive. Apply it to the surface, press it down, pull it apart slightly, then put your weight on it to seal it down. This stuff sticks! Did all the lifted shingles in about 45 minutes. I wore an old pair of mechanic's gloves and just threw them out when done. It's pretty unforgiving if you get it on you . Had another storm roll through a couple days later and every repair held firm. Only 45 mph wind this time, but they held. I didnt have any problem with hardening in the tube. I must've got a fresh batch. I set it in the sun on an asphalt driveway for a couple of hours before I started. It was nice and pliable on a 75 degree day. This worked as advertised.

### ⭐⭐⭐⭐⭐ Great Product, there is no substitute
*by S***H on December 8, 2025*

There is no substitute. Have been using this product for years. Make sure the sealant is warm when you go to use this product, it is great but is much easier to get out of the tube when it is not cold. Also, I always wear disposable gloves and have a rag or two handy during application. The less you get on things you don't want it on, the happier you will be. It is not easy to thoroughly remove it from tools or your hands without a solvent of some kind.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-27*