Will this help to stop a block leak where the water pump connects to the cooling system?

No. This will only help with small leaks. As temp fix.

Can it be used on 1968 327cid for leaking freeze plug?

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.

heater core leak fixed?

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.

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

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.

Desertcart Logo

Deliver to Malaysia

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🛠️ Fix leaks like a boss—one pour, permanent peace of mind!

SEAL LIKE A PRO - Permanently repairs leaks in engines, radiators, and cooling systems with a one-step pour-in formula.
SAFE SMART SOLUTION - Formulated to protect plastic, aluminum, and cast iron components without harming your cooling system.
STRENGTH IN EVERY DROP - Fiber additives lock with liquid copper to create a durable, long-lasting seal that outperforms regular stop leaks.
ZERO HASSLE MAXIMUM FIX - No draining required—just add directly to your radiator and get back on the road faster.
ALL INCLUSIVE COOLANT COMPATIBILITY - Works seamlessly with all traditional and extended life coolants, regardless of color or type.

Bar's Leaks 1109 Liquid Copper Block Seal is an 18 oz. advanced sodium silicate formula designed to permanently seal coolant leaks in all types of vehicles. Compatible with all coolant types and safe for plastic, aluminum, and cast iron parts, it requires no draining and uses fiber additives to create a strong, lasting repair.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

RM98

Duties & taxes incl.

Malaysiastore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

ChatGPT - opens in a new tab Perplexity - opens in a new tab Claude - opens in a new tab Grok - opens in a new tab Google AI - opens in a new tab

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

View all Trustpilot reviews

Material	Sodium Silicate
Brand	Bar's Leaks
Style	1 Pack
Item Weight	18 Ounces
Item dimensions L x W x H	7.5 x 2.6 x 2.6 inches
Water Resistance Level	Waterproof
Item Form	Liquid
UPC	046087011096
Unit Count	1.0 Count
Global Trade Identification Number	00046087011096
Number of Items	1
Surface Recommendation	Copper
Manufacturer	Bar's Leaks
Item Weight	1.12 pounds
Product Dimensions	7.5 x 2.6 x 2.6 inches
Item model number	1109
Is Discontinued By Manufacturer	No
Manufacturer Part Number	1109

Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions