What kind of cracks and holes can it seal?

It seals cracks and holes in cast iron & aluminum engine blocks, head gaskets, freeze plugs, & copper, aluminum & bi-material radiators & heater cores.

Is it tested by any lab?

Yes, it is tested by an independent test lab.

It is rated No. 1 in the market, meaning it is highly effective.

How about if you can't take off thermostat?

In that case, you don't need to remove the thermostat. Simply drain the coolant, fill halfway with tap water, add the CRC bottle, top off with water, and drive for approximately 500 miles.

Can we pour it into the overflow reservoir?

No, you should pour the product into the radiator hose after removing the top hose. It is recommended to mix the product with hot water before adding it to the hose.

Will it stop water to oil leak?

No, this product is only effective for coolant leaks. The block sealant works by fusing particles together at the crack in the combustion chamber. It is important to leave the product in the coolant for approximately 500 miles to allow it to travel into the cylinder and plug the leak.

Should I change my oil before or after using the block sealant?

Neither one. The metallic block sealant goes in the radiator. If there is a head gasket issue causing water to get into the oil, it is recommended to change the oil after using the block sealant.

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CRC

CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - 16 Oz

Item #:3784852

4.7 rating

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PKR 4917
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This product is not Fulfilled by Ubuy and can take minimum 10 days in delivery. We might cancel the product from the order and refund you if any issue arise with the delivery of this product.

Availability : In Stock

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Forms a permanent molecular bond that's as strong as steel.

Product Details

Is Discontinued By Manufacturer
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Features & Benefits

Seals cracks & holes in cast iron & aluminum engine blocks, head gaskets, freeze plugs, & copper, aluminum & bi material radiators & heater cores.
Tested by an Independent test lab.
Rated No.1 in the market.

Product Description

Overview

CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - 16 Oz

About This Item

Introducing the CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - the ultimate solution for sealing cracks and holes in engine blocks, head gaskets, radiators, and heater cores. Engine troubles can be a real headache, but with CRC K&W 401016 Block Seal, you can quickly and effectively repair damaged components and get your vehicle back on the road in no time. Crafted with advanced technology, this powerful formula forms a permanent molecular bond that is as strong as steel.

Whether it's a cast iron or aluminum engine block, this sealant will do wonders, ensuring a durable and reliable fix. Designed for versatility, CRC K&W 401016 Block Seal is suitable for use on a wide range of surfaces, including copper, aluminum, and bi-material radiators and heater cores. No matter the material, this sealant will create a secure and long-lasting seal, preventing further leakage and potential damage.

Rest easy knowing that the reliability of CRC K&W 401016 Block Seal has been confirmed by an independent test lab. It has been rigorously tested and proven to be the number one choice for those seeking a reliable solution to their engine problems. When it comes to sealing cracks and holes, trust only the best.

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Customer Questions & Answers

Question : What kind of cracks and holes can it seal?
Answer : It seals cracks and holes in cast iron & aluminum engine blocks, head gaskets, freeze plugs, & copper, aluminum & bi-material radiators & heater cores.
Question : Is it tested by any lab?
Answer : Yes, it is tested by an independent test lab.
Question : How effective is it?
Answer : It is rated No. 1 in the market, meaning it is highly effective.
Question : How about if you can't take off thermostat?
Answer : In that case, you don't need to remove the thermostat. Simply drain the coolant, fill halfway with tap water, add the CRC bottle, top off with water, and drive for approximately 500 miles.
Question : Can we pour it into the overflow reservoir?
Answer : No, you should pour the product into the radiator hose after removing the top hose. It is recommended to mix the product with hot water before adding it to the hose.
Question : Will it stop water to oil leak?
Answer : No, this product is only effective for coolant leaks. The block sealant works by fusing particles together at the crack in the combustion chamber. It is important to leave the product in the coolant for approximately 500 miles to allow it to travel into the cylinder and plug the leak.
Question : Should I change my oil before or after using the block sealant?
Answer : Neither one. The metallic block sealant goes in the radiator. If there is a head gasket issue causing water to get into the oil, it is recommended to change the oil after using the block sealant.

Customer Ratings

4.7 out of 5

197 customers ratings

5 star
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4 star
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3 star
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CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - 16 Oz

The CRC K&W 401016 Block Seal Permanent Metallic Block & Radiator Seal is a product that aims to stop leaks in the engine block and radiator. The process involves draining the existing coolant, filling the system with tap water, adding the CRC bottle, and then topping off with more water. After driving for approximately 500 miles, the product should start to take effect. The water in the radiator should stop leaking, indicating that the block sealant has plugged the leak. It is important to note that this product is not designed to fix water to oil leaks and should be used for coolant leaks only.

Pros

Effectively stops coolant leaks in the engine block and radiator
Easy to use with clear instructions provided

Cons

Not suitable for fixing water to oil leaks

Important Information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - 16 Oz

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