---
product_id: 320796902
title: "CRC K&W 401016 Block Seal Permanent Metallic Block & Radiator Se"
brand: "crc"
price: "₱6330"
currency: PHP
in_stock: true
reviews_count: 5
url: https://www.desertcart.ph/products/320796902-crc-k-and-w-401016-block-seal-permanent-metallic-block
store_origin: PH
region: Philippines
---

# Withstands extreme pressure & temps Universal for all water-cooled engines Permanent molecular steel-strong seal CRC K&W 401016 Block Seal Permanent Metallic Block & Radiator Se

**Brand:** crc
**Price:** ₱6330
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** CRC K&W 401016 Block Seal Permanent Metallic Block & Radiator Se by crc
- **How much does it cost?** ₱6330 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/320796902-crc-k-and-w-401016-block-seal-permanent-metallic-block)

## Best For

- crc enthusiasts

## Why This Product

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

## Key Features

- • **Professional Grade Formula:** Exceeds ASTM D6107 standards for reliable, long-lasting performance
- • **Steel-Strong Molecular Seal:** Permanently seals cracks & holes like a pro
- • **Universal Engine Compatibility:** Works flawlessly on cast iron, aluminum, and bi-metal radiators
- • **Easy Application for Lasting Results:** Just add, follow instructions, and stop coolant loss for good
- • **Extreme Pressure & Temperature Resistance:** Keeps your cooling system leak-proof under the harshest conditions

## Overview

CRC K&W 401016 Block Seal is a professional-grade, permanent metallic sealant designed to fix leaks in cast iron and aluminum engine blocks, radiators, and heater cores. Compatible with all water-cooled diesel and gasoline vehicles, it withstands extreme pressure and temperatures, exceeding ASTM D6107 standards to ensure a durable, reliable seal that prevents coolant loss and keeps your engine running smoothly.

## Description

International products have separate terms are sold from abroad and may differ from local products including fit age ratings and language of product labeling or instructions

Review: I used the this product twice and finally it worked. First time, I followed the instructions blindly without paying attention to capacity. I mixed it with 3 quarts of water. But I was only able to put half the solution to the radiator because my car has small capacity. So after doing all the things, My cars is still loosing coolant. After thinking it over, I decided to give a 2nd try. This time I mixed it with less water so I managed to put the whole can of k &w into cooling system. After going through all the procedures according to the video, it finally worked. Now I hope it will last a long time.
Review: Very good product

## Features

- Permanent molecular seal that's as strong as steel
- Seals cracks & holes in cast iron and aluminum engine blocks, head gaskets, freeze plugs, and copper, aluminum and bi-material radiators & heater cores
- For use in all water-cooled diesel and gasoline vehicles
- Withstands extreme pressure and temperatures of a cooling system and will not wash away
- Professional grade formula exceeds ASTM D6107 for effectively sealing leaks in cooling systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000CIPV5E |
| Brand | CRC |
| Customer Reviews | 4.1 4.1 out of 5 stars (361) |
| Date First Available | 28 August 2012 |
| Item Weight | 522 g |
| Item model number | 401016 |
| Manufacturer | CRC |
| Manufacturer Part Number | 401016 |
| Product Dimensions | 14.91 x 5.87 x 5.41 cm; 521.63 g |

## Images

![CRC K&W 401016 Block Seal Permanent Metallic Block & Radiator Se - Image 1](https://m.media-amazon.com/images/I/719Ox96ysYL.jpg)

## Questions & Answers

**Q: How is this one different from another orange can with the same product title, also sold at Amazon?**
A: If you provide a link I would be happy to see if there is a difference. I do not find a single can listed with this same title. I see a 6 pack.

**Q: how about if you can’t take off thermostat.. cause my truck  Thermostat come with it 2005 Dodge ram 1500**
A: I didn’t take off my thermostat.  All I did was drain the existing coolant, fill it up with tap water half way then add the CRC bottle and then top off the water.  Drive it around for a week or two (500 miles). Check the radiator daily before you head out and if it does down fill it up with water.  After a week of driving you will notice that the water in the radiator will stop leaking (if it works).  Once it stops leaking for a couple of days then you can drain it again, flush it out with water then add in your coolant again.

**Q: can we pour it into the overflow reservoir?**
A: If I remember it's a big no on that. Take off the top hose of radiator and pour it in the hose. But you want to have room for it to flow into radiator. I think it was kinda thick so mix it with hot water then add to hose. That's my two cents.

**Q: will it stop water to oil leak?**
A: I don’t think so....think of it this way, the coolant has to leak into the combustion chamber for it to work.  The high heat will fuse the particle together at the crack and eventually plug up the leak.  You would have to leave it in your coolant for approx 500 miles.  That will give it time for this mixture to travel into your cylinder, heat up and plug up the leak.  Actually for me it only took about 200 miles and I noticed the water in the radiator stopped leaking (I check it every morning before driving out).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by Q***G on 17 January 2022*

I used the this product twice and finally it worked. First time, I followed the instructions blindly without paying attention to capacity. I mixed it with 3 quarts of water. But I was only able to put half the solution to the radiator because my car has small capacity. So after doing all the things, My cars is still loosing coolant. After thinking it over, I decided to give a 2nd try. This time I mixed it with less water so I managed to put the whole can of k &w into cooling system. After going through all the procedures according to the video, it finally worked. Now I hope it will last a long time.

### ⭐⭐⭐⭐⭐ Review
*by G***E on 11 September 2025*

Very good product

### ⭐⭐⭐⭐⭐ Review
*by B***N on 2 January 2026*

Works as it should

## Frequently Bought Together

- CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - 16 Oz
- BlueDevil Products 00203 Radiator Flush & Oil Degreaser - 1 Quart
- K&W 401232 Permanent Head Gasket & Block Repair with Nanotechnology - 32 Fl Oz

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-03-10*