0 ratings
THERMAGASKET Extreme Duty Head Gasket Sealer & Block Repair for Large Gas Diesel Engines - 48oz Kit for Blown Head Gaskets & Cracked Blocks/Heads, 10 Min Fast-Acting Permanent Seal, 7+ Gallon Capacity
genuine image
THERMAGASKET Extreme Duty Head Gasket Sealer & Block Repair for Large Gas Diesel Engines - 48oz Kit for Blown Head Gaskets & Cracked Blocks/Heads, 10 Min Fast-Acting Permanent Seal, 7+ Gallon Capacity
Seal leaks yourself, saving time and money while extending your engine's life.
THERMAGASKET Extreme Duty Head Gasket Sealer & Block Repair for Large Gas Diesel Engines - 48oz Kit for Blown Head Gaskets & Cracked Blocks/Heads, 10 Min Fast-Acting Permanent Seal, 7+ Gallon Capacity
Item #: 84490923

THERMAGASKET Extreme Duty Head Gasket Sealer & Block Repair for Large Gas Diesel Engines - 48oz Kit for Blown Head Gaskets & Cracked Blocks/Heads, 10

80% of respondents would recommend this to a friend

Item #: 84490923

SHP 356

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from US

0 ratings Write a review
In stock
us Imported from USA store

QTY:

Order now and get it around Thursday, October 01
Secured transactionsecured transaction

Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.

Our Top Logistics Partners
  • fedex
  • dhl
Seal leaks yourself, saving time and money while extending your engine's life.
U-Care Warranty:
None
Select a Plan
fast shipping

Fast
Shipping

free return

Free
Return*

secure packaging

Secure Packaging

100% original products

100% Original Products

pci-dss

PCI DSS Compliance

iso certified

ISO 27001 Certified

paypal payment
visa payment
mastercard payment
Note: Step 1 Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

Fast-Acting Seal
Provides a permanent, fast-acting solution in just 10 minutes, ensuring quick repairs and minimizing downtime for large gas and diesel engines.
Large Capacity
Designed to handle up to 7+ gallons, making it ideal for larger engine types, ensuring comprehensive coverage and effectiveness in tackling severe leaks.
Extreme Duty Design
Specifically formulated for extreme conditions, addressing blown head gaskets and cracked blocks/heads, providing reliable, lasting repairs under high stress.

Product Details

Shop THERMAGASKET Extreme Duty Head Gasket Sealer & Block Repair for Large Gas Diesel Engines - 48oz Kit for Blown Head Gaskets & Cracked Blocks/Heads, 10 Min Fast-Acting Permanent Seal, 7+ Gallon Capacity online at a best price in Saint Helena. B0CQ7BQD6R
Item Weight3 lbs (1.36 kg)

Who Should Buy?

Suitable For
  • DIY Mechanics

    Ideal for weekend mechanics looking for a quick, effective solution for blown head gaskets and cracked blocks.

  • Fleet Operators

    Beneficial for those managing multiple vehicles, needing a reliable and fast repair for large gas and diesel engines.

  • Heavy-Duty Users

    Perfect for users running larger engines that require robust sealing solutions under high-stress conditions.

Not Suitable For
  • Professional Mechanics

    May not meet the standards required for professional repair settings or warranty work on high-end vehicles.

Product Description

THERMAGASKET Extreme Duty Head Gasket Sealer & Block Repair for Large Gas Diesel Engines - 48oz Kit for Blown Head Gaskets & Cracked Blocks/Heads, 10 Min Fast-Acting Permanent Seal, 7+ Gallon Capacity

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is THERMAGASKET Extreme Duty Head Gasket Sealer used for?

    Answer: THERMAGASKET is designed specifically to seal blown head gaskets and repair cracked blocks or heads in large gas and diesel engines. This product works by creating a permanent seal within minutes, making it effective for both emergency repairs and preventative maintenance. It is particularly useful for automotive professionals and DIY enthusiasts looking to extend the life of their engines and avoid costly replacements. By addressing leaks efficiently, it helps maintain engine performance and overall vehicle reliability.
  • Question: How quickly does THERMAGASKET work?

    Answer: THERMAGASKET Extreme Duty Head Gasket Sealer acts quickly, providing a permanent seal within just 10 minutes of application. This rapid action allows you to get back on the road without long waiting periods associated with traditional repair methods. For those experiencing urgent leaks, this makes it an ideal choice, as it reduces downtime significantly. It’s particularly beneficial for mechanics in busy shops or individuals who need a swift solution for unexpected engine issues.
  • Question: Is THERMAGASKET suitable for all engine types?

    Answer: While THERMAGASKET is designed for large gas and diesel engines, it is important to check compatibility with your specific engine type before use. This product is formulated to handle the extreme conditions typical of heavy-duty engines, providing effective sealing against leaks. Mechanics typically recommend using it for vehicles experiencing overheating or loss of power due to gasket failures. However, always refer to your vehicle's manual for proper guidelines and to ensure it aligns with your engine's specifications.
  • Question: How do you apply THERMAGASKET?

    Answer: Application of THERMAGASKET is straightforward and can be done with minimal tools. Start by ensuring the engine is cool and cleaning the surface around the damaged area. Next, pour the sealer directly into the radiator or coolant reservoir, following the instructions on the package. Start the engine and allow it to reach operating temperature to facilitate the sealing process. This method is particularly effective when addressing minor leaks promptly, preventing further damage and potential engine overheating.
  • Question: Can THERMAGASKET be used as a preventive measure?

    Answer: Yes, THERMAGASKET can be applied as a preventive measure for older engines or those that have previously experienced gasket issues. Regular application can help maintain a reliable seal and mitigate the risk of future leaks. Car owners may find this beneficial as part of routine engine maintenance, especially in high-mileage vehicles where wear and tear could lead to such failures. This proactive approach can ultimately save on extensive repairs down the line, promoting better engine health over time.
  • Question: What are the benefits of using THERMAGASKET?

    Answer: Using THERMAGASKET provides several benefits: it offers a fast and permanent solution to blown head gaskets and cracked engines, helping to restore engine performance. Its 48oz kit is suitable for engines with over 7 gallons of coolant capacity, making it ideal for heavy-duty vehicles. Furthermore, this product is designed to withstand the high pressures and temperatures typical in large gas and diesel engines. It's particularly useful for fleet maintenance, where reducing downtime is crucial for operational efficiency.
  • Question: Is special equipment needed to use THERMAGASKET?

    Answer: No special equipment is required to use THERMAGASKET; basic tools such as a funnel and a cleaning rag are usually sufficient. The process is designed to be user-friendly, allowing both professionals and everyday users to perform repairs without extensive mechanical expertise. This makes it a practical option for vehicle owners who want an efficient solution without the need for costly labor. Whether you are a novice or an experienced mechanic, this accessibility can facilitate quick and effective applications.
  • Question: What makes THERMAGASKET different from other sealers?

    Answer: THERMAGASKET stands out due to its fast-acting formula, capable of sealing within just 10 minutes, which is significantly quicker than many competing products. Its design specifically targets large gas and diesel engines, ensuring it meets the high demands of heavy-duty applications. Additionally, the composition of THERMAGASKET allows it to create a strong bond that withstands extreme pressures and temperatures. This durability makes it preferable for mechanical professionals who require reliable performance under challenging conditions.
  • Question: Can THERMAGASKET fix severe engine damage?

    Answer: THERMAGASKET is best suited for minor to moderate engine issues, such as small cracks and leaks. While it can provide an effective seal, it is not a substitute for comprehensive repairs in cases of severe engine damage or extensive deterioration. For more significant issues, a professional engine evaluation is advisable. That said, THERMAGASKET can serve as a temporary solution, allowing for immediate use of the vehicle while planning for necessary repairs or replacements.
  • Question: Where can I buy THERMAGASKET Extreme Duty Head Gasket Sealer?

    Answer: You can purchase THERMAGASKET Extreme Duty Head Gasket Sealer from a variety of online platforms, but for customers in Saint Helena, Ubuy is a recommended option. Ubuy offers a straightforward purchasing experience, allowing you to find this essential product with ease. Their platform supports efficient navigation and filters to help locate the item quickly, ensuring you can order the specific kit you need for effective vehicle maintenance.

Gasket Editorial Review

No editorial reviews found

Customer Reviews & Ratings

1 customers ratings
  • 5 Star
    100%
  • 4 Star
    0%
  • 3 Star
    0%
  • 2 Star
    0%
  • 1 Star
    0%

Review this product

Share your thoughts with other customers

Pros

  • Effective for blown head gaskets
  • Works on large engines
  • Easy to use process
  • Durable and long-lasting
  • Non-toxic formula

Cons

  • May take longer to set in some cases.

Platform Trust & Buyer Confidence

trustpilot logo
4.2/5 9477 reviews
Read reviews
JK
Jasmin
Verified buyer

“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
AG
Anke
Verified buyer

“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”

10 September 2026 · via Trustpilot
H
Hazel
Verified buyer

“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”

10 September 2026 · via Trustpilot
O
Opaleye
Verified buyer

“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot
AC
Adele
Verified buyer

“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
Secure Checkout Global Delivery Easy Returns Genuine Products

Product Price History

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.

SHP 356

Order now and get it around Thursday, October 01

QTY:

Secured transactionsecured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners
  • fedex
  • dhl
Fastest cross-border delivery

Features & Benefits

  • Shields large capacity gas and diesel engines for peak performance under extreme conditions.
  • Effortlessly tackles stubborn engine leaks from head gasket failures to radiator mishaps.
  • Formulated by industry professionals for a dependable, long-lasting seal.
  • Achieve professional-grade fixes with a simple shake and pour.
  • Bonds to all engine materials for a permanent repair that stands the test of time and heat.

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.