---
product_id: 9782295
title: "Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems"
brand: "bar's leaks"
price: "8.18 OMR"
currency: OMR
in_stock: true
reviews_count: 13
category: "Bar's Leaks"
url: https://www.desertcart.com.om/products/9782295-bars-leaks-1109-liquid-copper-block-seal-intake-and-radiator
store_origin: OM
region: Oman
---

# One-step permanent leak fix Compatible with all coolant types Fiber-reinforced durable seal Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems

**Brand:** bar's leaks
**Price:** 8.18 OMR
**Availability:** ✅ In Stock

## Summary

> 🛠️ Fix leaks once, drive worry-free forever!

## Quick Answers

- **What is this?** Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems by bar's leaks
- **How much does it cost?** 8.18 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/9782295-bars-leaks-1109-liquid-copper-block-seal-intake-and-radiator)

## Best For

- bar's leaks enthusiasts

## Why This Product

- Trusted bar's leaks brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **No Draining Required:** Simply add directly to your radiator—save time and avoid messy coolant changes.
- • **Permanent Leak Repair:** Stop coolant loss for good with a single pour—no repeat fixes needed.
- • **Multi-Material Sealant:** Penetrates and seals leaks in plastic, aluminum, and cast iron components.
- • **Fiber-Enhanced Strength:** Advanced fiber additives lock the seal in place for long-lasting durability.
- • **Universal Coolant Compatibility:** Works seamlessly with all traditional and extended life antifreeze blends.

## Overview

Bar’s Leaks 1109 Liquid Copper Block Seal is a powerful, one-step radiator and intake leak repair solution. Its sodium silicate liquid glass formula permanently seals leaks in various engine materials without draining coolant. Compatible with all coolant types and enhanced with fiber additives, it offers a durable, hassle-free fix trusted by thousands of drivers.

## Description

Bar’s Leaks® Liquid Copper™ Block Seal Coolant Leak Fix Stop Leak seals larger leaks regular stop leaks won’t. One step formula permanently repairs coolant loss problems on cars, trucks, vans, SUV’s and RV’s. Antifreeze compatible sodium silicate liquid glass penetrates large and small leaks in plastic, aluminum and cast iron heads, blocks, intake manifold & gaskets, freeze plugs, heater cores and radiators. Fiber additives lock together with liquid to increase strength and promote a permanent seal. It will not harm the coolingsystem when used properly, no draining is required. Use with ALL types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water.

Review: Thank you Bar’s Leak Sealant!! Something that actually works! - OMG thank you for this wonderful product!! I used it in my old skid steer which was leaking a lot and overheating. Replacing the radiator does not seem to be an option- it’s above my ability and can’t find a mechanic to work on it. I had tried other radiator seal products with unsustainable results. As a last ditch effort I ordered this Bar’s copper block seal and it WORKS!!!! It has been several months and is still working, I am so very happy. The cost is a bit higher than the other products that did not work. For any future problems I won’t waste my money on cheaper products, this product is totally worth the extra few dollars. In the end it has literally saved me hundreds of dollars.
Review: It stopped my minor coolant leak on my 97 Ford F150 4.6 V8 - I had a minor coolant leak coming out the passenger rear side of my block, about several drops after engine shutdown, small head gasket leak. I added a bottle of this stuff and it seemed to have stop the leak...been several months so far. So far, so good. 1997 Ford F150 4.6 V8 with 140k miles. Engine has never been apart.

## Features

- PERMANENTLY FIXES COOLING SYSTEM LEAKS: . One step formula permanently repairs coolant loss problems on cars, trucks, vans, SUV’s and RV’s.
- ANTIFREEZE COMPATIBLE - NO DRAINING REQUIRED: Antifreeze compatible sodium silicate liquid glass penetrates large and small leaks in plastic, aluminum and cast iron heads, blocks, intake manifold & gaskets, freeze plugs, heater cores and radiators.
- ONE STEP - POUR DIRECTLY INTO RADIATOR - EASY TO USE: Fiber additives lock together with liquid to increase strength and promote a permanent seal. It will not harm the coolingsystem when used properly, no draining is required.
- USE WITH ALL TYPES OF TRADITIONAL OR EXTENDED LIFE COOLANT: Use with ALL types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002PX91OG |
| Best Sellers Rank | #6,379 in Automotive ( See Top 100 in Automotive ) #1 in Radiator Sealers |
| Brand | Bar's Leaks |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,438) |
| Date First Available | November 1, 2007 |
| Global Trade Identification Number | 00046087011096 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 1.3 pounds |
| Item dimensions L x W x H | 7.5 x 2.6 x 2.6 inches |
| Item model number | 1109 |
| Manufacturer | Bar's Leaks |
| Manufacturer Part Number | 1109 |
| Material | Sodium Silicate |
| Model | Bar's Leaks |
| Number of Items | 1 |
| Product Dimensions | 7.5 x 2.6 x 2.6 inches |
| Style | 1 Pack |
| Surface Recommendation | Miscellaneous |
| UPC | 046087011096 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Bar's Leaks
- **Item Weight:** 1.3 Pounds
- **Item dimensions L x W x H:** 7.5 x 2.6 x 2.6 inches
- **Material:** Sodium Silicate
- **Style:** 1 Pack

## Images

![Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems - Image 1](https://m.media-amazon.com/images/I/618jCtXmpHL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Will this help to stop a block leak where the water pump connects to the cooling system?**
A: No. This will only help with small leaks. As temp fix.

**Q: Can it be used on 1968 327cid for leaking freeze plug?**
A: Yes, Our formula permanently repairs larger leaks in radiators, intake manifolds and gaskets, heater cores, blocks, heads and freeze plugs. It contains an antifreeze-compatible sodium silicate liquid glass formula, so no draining of the cooling system is required. Not to mention, it will not harm the cooling system when used properly. The intake gasket seal you’ve been looking for is far more effective, easy to use, and less expensive than you’ve ever imagined. This is why Bar’s Leaks exists: to offer usable, low-cost intake gasket seal and other products to auto owners who have no special experience or expertise. We’ve been doing this for over 70 years, so we know a thing or two about chemical repairs.

One bottle treats cooling systems from 12 quarts (3 gallons) to 24 quarts (6 gallons). Use 1/2 bottle for cooling systems from 8 quarts (2 gallon) to 11.9 quarts (2.99 gallons). For larger systems use one bottle for every 6 gallons of cooling system capacity. Small engines or other small systems use approximately 3 fluid ounces per gallon of fluid capacity.

If you have any other technical questions, feel free to contact our Technical Service Professionals at 800-345-6572 or if you would prefer you can use the contact us page on our website.

**Q: heater core leak fixed?**
A: The label on the lower right does show Heater Core. So this could work since coolant is being pumped through the heater core to heat the cabin of a vehicle.

**Q: Can this help with a 5.3l gm engine with the bad cylinder head castings? i'm saving for a replacement engine, just need this one to last a while**
A: Thanks for your question, and for considering Bar's Leaks to help with your vehicle's needs. The product you are asking about - Bar's Leaks Block Seal Intake & Radiator Stop Leak is a great product for repairing larger leaks in radiators, intake manifolds & gaskets, heater cores, blocks, heads and freeze plugs. However, if your vehicle is showing signs of head gasket failure due to the bad castings you refer to, we would suggest one of our head gasket products, such as Head Gasket Fix (part number 1111), which is very successful in sealing leaks as long as your vehicle can run 20 minutes or longer without overheating or needing to add coolant. If your vehicle is unable to run for 20 minutes without overheating, but can run for at least 15 minutes, we recommend our strongest head gasket stop leak - Head Seal Blown Head Gasket Repair (part number HG-1). For best results, these products should be installed into a clean cooling system, following the installation instructions and proper dosage. If you are unsure how clean your cooling system is, or you haven't had it chemically flushed in the last three to four years, we recommend doing so before installing any stop leak products.

If you have any other questions, or we can be of further assistance, please feel free to call our Tech Support team at 1-800-345-6572. We are here to assist you Monday through Friday, from 8 am to 5 pm, Eastern time.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Thank you Bar’s Leak Sealant!! Something that actually works!
*by G***N on January 11, 2026*

OMG thank you for this wonderful product!! I used it in my old skid steer which was leaking a lot and overheating. Replacing the radiator does not seem to be an option- it’s above my ability and can’t find a mechanic to work on it. I had tried other radiator seal products with unsustainable results. As a last ditch effort I ordered this Bar’s copper block seal and it WORKS!!!! It has been several months and is still working, I am so very happy. The cost is a bit higher than the other products that did not work. For any future problems I won’t waste my money on cheaper products, this product is totally worth the extra few dollars. In the end it has literally saved me hundreds of dollars.

### ⭐⭐⭐⭐⭐ It stopped my minor coolant leak on my 97 Ford F150 4.6 V8
*by W***S on January 18, 2026*

I had a minor coolant leak coming out the passenger rear side of my block, about several drops after engine shutdown, small head gasket leak. I added a bottle of this stuff and it seemed to have stop the leak...been several months so far. So far, so good. 1997 Ford F150 4.6 V8 with 140k miles. Engine has never been apart.

### ⭐⭐⭐⭐ Good interim solution for a larger problem
*by M***Y on October 28, 2025*

Purchased this as a ‘band-aid’ fix to get me to my repair destination. While I have relied on this leak sealant before more upwards of 8 months, it is recommended that you use this as an interim solution and resolve your larger issue as time and money allow. When using it, follow the instructions and ideally only use it AS NEEDED. Research suggests that overuse or reliance on products such as this can lead to larger problems.

## Frequently Bought Together

- Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems
- PEAK 50/50 Prediluted Antifreeze and Coolant for All Engine Cooling Systems
- ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Tabs - 4 g

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-03-08*