---
product_id: 12883357
title: "BlueDevil Radiator & Block Sealer – 16 oz | Permanent Repair for Radiator & Engine Block Leaks | Safe, Non-Clogging Formula for All Cooling Systems"
brand: "bluedevil products"
price: "₪128"
currency: ILS
in_stock: true
reviews_count: 8
category: "Blue Devil Products"
url: https://www.desertcart.co.il/products/12883357-bluedevil-radiator-and-block-sealer-16-oz-permanent-repair-radiator
store_origin: IL
region: Israel
---

# Non-clogging, fiber-free formula Works on plastic, aluminum & metal Permanent leak repair BlueDevil Radiator & Block Sealer – 16 oz | Permanent Repair for Radiator & Engine Block Leaks | Safe, Non-Clogging Formula for All Cooling Systems

**Brand:** bluedevil products
**Price:** ₪128
**Availability:** ✅ In Stock

## Summary

> 💙 Seal it once, drive worry-free forever!

## Quick Answers

- **What is this?** BlueDevil Radiator & Block Sealer – 16 oz | Permanent Repair for Radiator & Engine Block Leaks | Safe, Non-Clogging Formula for All Cooling Systems by bluedevil products
- **How much does it cost?** ₪128 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/12883357-bluedevil-radiator-and-block-sealer-16-oz-permanent-repair-radiator)

## Best For

- bluedevil products enthusiasts

## Why This Product

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

## Key Features

- • **Zero Clog Formula:** Advanced fiber-free liquid ensures your cooling system stays clean and efficient.
- • **Seal Leaks for Good:** Permanently fixes radiator & engine block leaks without costly replacements.
- • **Trusted & Guaranteed:** Backed by professional-grade performance and a strong customer satisfaction record.
- • **Effortless Application:** Simple pour-in solution saves time and avoids messy repairs.
- • **Universal Compatibility:** Safe and effective on all cooling system materials including plastic, aluminum, and cast iron.

## Overview

BlueDevil Radiator & Block Sealer is a 16 oz professional-grade liquid designed to permanently repair leaks in radiators and engine blocks. Its unique non-clogging, fiber-free formula works safely on plastic, aluminum, and metal cooling system components, ensuring compatibility with all engine types and antifreeze. Easy to use with a simple pour-in method, it prevents costly repairs by sealing leaks effectively and reliably.

## Description

Seal Radiator & Block Leaks for Good BlueDevil Radiator & Block Sealer is a professional-grade solution designed to permanently repair leaks in radiators and engine blocks. Its advanced formula bonds to a variety of materials—including plastic, aluminum, and cast iron—without clogging or harming your cooling system. Why Choose BlueDevil? ✔ Permanent seal for radiator and block leaks ✔ Safe for all cooling system components ✔ Non-clogging, fiber-free formula ✔ Compatible with all engine types and antifreeze ✔ Simple pour-in application Protect your engine and avoid costly repairs—trust BlueDevil Radiator & Block Sealer.

Review: Unbelievable - I used blue devil because of the comments. My water pump went out on me and cracked the block right behind water pump due to over heating. After replacing water pump and putting blue devil in the radiator I watched a spray of water go from spraying water out to a trickle and then to nothing and the heat on the motor dried up all moisture. Drove my truck up the road about 8 miles and back with absolutely no issues. I’ve never seen any product work like it says it does. Blue devil does work. It took 45 minutes like it said but every time the thermostat cycled the leak got less and less. It’s unbelievable it actually sealed a cracked block.
Review: keep the car or sell it - I was going to sell my car but it only has 96k miles ...it "had" a timing chain cover leak (about $1,200 including chain to fix) and if you put pellets in there are brown remnents evrywhere BUT with Blue Devil ...your system is the same color as your raditor fluid AND the leak is stopped ...p.s. heater core too but who needs heat in Texas

## Features

- Permanent repair for radiator and block leaks.
- Works effectively on plastic, aluminum and/or metal radiators
- Contains no solids or fibrous materials.
- Safe and Easy to use.
- Guaranteed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00N3XVNXE |
| Best Sellers Rank | #61,035 in Automotive ( See Top 100 in Automotive ) #10 in Radiator Sealers #1,996 in Oils & Fluids |
| Brand | BlueDevil Products |
| Color | Blue Bottle |
| Customer Reviews | 4.1 4.1 out of 5 stars (177) |
| Date First Available | August 28, 2014 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 1 pounds |
| Item dimensions L x W x H | 2.75 x 2.75 x 7.25 inches |
| Item model number | 00205 |
| Manufacturer | BlueDevil Products |
| Manufacturer Part Number | 00205 |
| Material | Plastic |
| Model | BlueDevil 00205 Radiator & Block Sealer - 16 Ounce |
| Number of Items | 1 |
| Product Dimensions | 2.75 x 2.75 x 7.25 inches |
| Style | Compact |
| UPC | 891838002058 |
| Unit Count | 16.0 Ounce |

## Product Details

- **Brand:** BlueDevil Products
- **Item Weight:** 1 Pounds
- **Item dimensions L x W x H:** 2.75 x 2.75 x 7.25 inches
- **Material:** Plastic
- **Style:** Compact

## Images

![BlueDevil Radiator & Block Sealer – 16 oz | Permanent Repair for Radiator & Engine Block Leaks | Safe, Non-Clogging Formula for All Cooling Systems - Image 1](https://m.media-amazon.com/images/I/71PQ9MLq3FL.jpg)

## Questions & Answers

**Q: useing blue devil radiator sealer do you need to flush radiator first**
A: I think it says to drain and flush all coolant and to use their flush chemicals before using the sealer.  My friend used the sealer on his engine and all he did was drain and flush thoroughly with clear water before using the sealer.  He had good results.  I am always a little critical about a product that infers that if you don't use their brand of prep the product may not perform as expected.   Is there a real potential or for some chemical reaction without that particular prep chemical or is it a gimmick to sell more of their product or is it an out if the product fails so they won't have to make good on a guarantee?  My friend was happy.  If I have something that needs sealing I would probably use the Blue Devil sealant.  I would be a little more thorough in flushing first.

**Q: What is the difference between this and the blue devil head gasket sealer?**
A: I imagine it's thicker

**Q: Do u need to flush engine first?**
A: The directions on the bottle specifically say: "NOTE: DIRTY (OR CLOGGED) SYSTEMS SHOULD BE CHEMICALLY FLUSHED BEFORE INSTALLING BLUEDEVIL RADIATOR & BLOCK SEALER".

**Q: Can this help if you have a cracked block due to not having enough protection from a deep freeze?**
A: My opinion is that it depends on the crack. I don’t think it will help you

## Customer Reviews

### ⭐⭐⭐⭐⭐ Unbelievable
*by L***Y on July 3, 2023*

I used blue devil because of the comments. My water pump went out on me and cracked the block right behind water pump due to over heating. After replacing water pump and putting blue devil in the radiator I watched a spray of water go from spraying water out to a trickle and then to nothing and the heat on the motor dried up all moisture. Drove my truck up the road about 8 miles and back with absolutely no issues. I’ve never seen any product work like it says it does. Blue devil does work. It took 45 minutes like it said but every time the thermostat cycled the leak got less and less. It’s unbelievable it actually sealed a cracked block.

### ⭐⭐⭐⭐⭐ keep the car or sell it
*by K***T on February 21, 2020*

I was going to sell my car but it only has 96k miles ...it "had" a timing chain cover leak (about $1,200 including chain to fix) and if you put pellets in there are brown remnents evrywhere BUT with Blue Devil ...your system is the same color as your raditor fluid AND the leak is stopped ...p.s. heater core too but who needs heat in Texas

### ⭐⭐⭐⭐ Four Stars
*by J***B on July 31, 2017*

Worked well for my radiator leak.

## Frequently Bought Together

- BlueDevil Products 00205 Radiator & Block Sealer - 16 Ounce
- BlueDevil Products 49499 Oil Stop Leak - 8 Ounce
- BlueDevil Products 00234 Rear Main Sealer - 8 Ounce

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*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-02-12*