1
Permanently repairs cooling system leaks.
Compatible with all antifreeze types.
No draining required for easy use.
Works on plastic, aluminum, and cast iron.
One-step application directly into radiator.
Fiber additives create strong, lasting seal.
Safe for cars, trucks, and RVs.
Average Rating out of 5:
Price Range: $7.97
Material: Sodium Silicate
2
Professional quality radiator repair kit included.
Easy-to-follow instructions for quick repairs.
Repairs holes up to 3/8" diameter.
Fix cracks up to 4" long easily.
Includes epoxy putty and fiberglass cloth.
Suitable for various plastics and composites.
Trusted by professionals and DIYers alike.
Average Rating out of 5:
Price Range: $11.75
3
Instant repair for gas tanks and radiators.
0.7-ounce strip for convenient usage.
Easy-to-use putty formula.
Permanently seals cracks and split seams.
Hardens like steel for durability.
Resistant to heat and chemicals.
Perfect for emergency repairs on-the-go.
Average Rating out of 5:
Price Range: $5.03
Material: Steel
4
Dissolved pelletized formula for effective sealing. Seals internal, external, and coolant-to-oil leaks. Specially formulated for larger leak repairs. Compatible with plastic, aluminum, and metal radiators. Inhibits rust and corrosion in cooling systems. Works with all antifreeze types and colors. Safe for use in straight water applications.
Average Rating out of 5:
Price Range: $5.99
5
High-temperature resistance from -54°C to 343°C.
Oil resistant and waterproof sealant for durability.
Good flexibility and can restore after stretching.
Easy disassembly with no shrinkage after curing.
Excellent pressure resistance and load-bearing capacity.
Suitable for various gasket replacements and bonding.
Quick-drying formula for efficient application.
Average Rating out of 5:
Price Range: $8.99
Material: Silicone
6
Permanent seal as strong as steel.
Seals cracks in engine blocks and radiators.
Works with all water-cooled vehicles.
Withstands extreme cooling system pressures.
Professional grade, exceeds ASTM D6107 standards.
Easy to use for effective leak sealing.
Compatible with various engine materials.
Average Rating out of 5:
Price Range: $17.50
7
Permanent repair for radiator and block leaks.
Works on plastic, aluminum, and metal radiators.
Contains no solids or fibrous materials.
Simple and safe application process.
Guaranteed effective for long-lasting results.
Compatible with all types of vehicles.
16-ounce bottle for multiple uses.
Average Rating out of 5:
Price Range: $25.04
8
Stops leaks in radiators and cooling systems.
Safe for all metals, plastics, and rubbers.
Compatible with all antifreeze types available.
Prevents rust and lubricates water pump.
One-step formula; easy to use.
Works for cars, trucks, SUVs, and RVs.
Cost-effective solution for coolant loss issues.
Average Rating out of 5:
Price Range: $7.99
Material: Silicone
9
Creates permanent seal in cooling systems.
Compatible with all types of antifreeze.
No sludge or clogging in systems.
Safe for aluminum, cast iron, and plastic.
Activates with heat and air for efficiency.
Ideal for everyday vehicles and heavy machinery.
Prevents leaks and maintains cooling system performance.
Average Rating out of 5:
Price Range: $22.90
10
Quickly stops leaks in radiators and hoses.
Patented formula for reliable leak repair.
Protects against pitting and corrosion damage.
Seals leaks up to 0.020" x 0.5".
Effective on large leaks without flow interference.
Combines natural and synthetic sealing components.
Addresses both leaks and their corrosive causes.
Average Rating out of 5:
Price Range: $3.80
Material: Metal
11
Effective radiator leak sealant for automotive use.
Stops leaks without clogging radiator cores.
Prevents coolant loss from multiple sources.
Easy application; no special tools required.
Provides peace of mind while driving.
Advanced formula for lasting protection.
Cost-effective solution for radiator leaks.
Average Rating out of 5:
Price Range: $19.99
12
Permanently seals cracks in cooling systems.
Advanced liquid glass and copper formula.
Withstands temperatures up to 2000°F.
Compatible with engines up to 6 gallons.
Effective for radiators and heater cores.
Easy to use and apply.
Restores system performance and efficiency.
Average Rating out of 5:
Price Range: $9.95
Material: Glass, Copper
13
Durable radiator flush tee for efficient cooling.
Designed for 3/4 inch connections.
Lightweight package for easy handling.
Dimensions: 8.128 x 2.54 x 12.192 cm.
Manufactured in Taiwan, Province Of China.
Ideal for automotive cooling applications.
Ensures optimal radiator performance and maintenance.
Average Rating out of 5:
Price Range: $8.57
14
Stops and seals coolant leaks effectively.
Contains double the power of competitors.
Treats entire cooling system with one bottle.
Compatible with all antifreeze types and colors.
Prevents costly repairs by sealing leaks.
Lightweight and convenient 6 oz. package.
Made in the United States for quality assurance.
Average Rating out of 5:
Price Range: $12.48
Material: Plastic
15
Quickly fix radiator leaks and damage.
Cost-effective compared to radiator replacements.
Compatible with all radiator types available.
Durable aluminum components ensure lasting repairs.
Heat-resistant for high-temperature applications.
Easy to use for DIY repairs.
Made in the USA for quality assurance.
Average Rating out of 5:
Price Range: $18.95
16
Effective seal for leaks in radiator systems.
Prevents rust and corrosion in cooling systems.
Lubricates water pump seals for optimal performance.
Controls electrolysis for longer system life.
Easy-to-use tablets for quick application.
Packs come with 12 tablets for multiple uses.
Compatible with all types of cooling systems.
Average Rating out of 5:
Price Range: $10.69
Material: Polyurethane, Acrylic
17
Expert-engineered for reliable cooling system protection.
Quick-seal formula for instant leak repairs.
Safe for metals, plastics, and rubber components.
Compatible with all antifreeze types available.
Prevents rust and lubricates water pump effectively.
Cost-effective solution for expensive repairs.
Ideal for any journey, ensuring leak-free travels.
Average Rating out of 5:
Price Range: $19.95
Material: Plastic
18
Permanently fixes coolant leaks in various vehicles.
Compatible with antifreeze; no draining needed.
Penetrates large and small leaks effectively.
Easy one-step application; just pour into radiator.
Safe for all traditional and extended life coolants.
Strengthens repairs with fiber additives for durability.
Works on plastic, aluminum, and cast iron parts.
Average Rating out of 5:
Price Range: $29.99
19
Repairs holes and cracks in metal tanks.
Quick and easy two-component kneadable stick.
Excellent resistance to chemicals and moisture.
Cures within 2 hours at ideal conditions.
Universal fit for various applications.
Not suitable for plastic gas tanks.
Durable and reliable sealing solution.
Average Rating out of 5:
Price Range: $10.99
20
Stops leaks quickly and effectively.
Compatible with all antifreeze and coolants.
Safe for metal, plastic, and rubber parts.
Lubricates water pump for optimal performance.
Easy to use; pour and go.
Guaranteed to work for lasting results.
Prevents costly repairs and downtime.
Average Rating out of 5:
Price Range: 0
Material: Plastic
21
Compatible with 2010-2018 Dodge Ram 2500/3500.
Designed for 6.7L Diesel Engine only.
OE/OEM Part Number: 55371021AA.
Made from high-quality, durable plastic material.
Ensures a perfect fit and longevity.
Easy installation with factory specifications.
Professional installation recommended for best results.
Price Range: $65.99
Color: Black
Material: Plastic
22
Seals radiator leaks quickly and effectively.
Prevents corrosion in engine components.
Lubricates water pump for smooth operation.
Saves on costly automotive repair bills.
Permanent solution to radiator issues.
Compact 3/4 oz. size for easy storage.
Beats traditional liquid stop leak products.
Average Rating out of 5:
Price Range: $15.59
23
Stops small leaks efficiently and quickly.
Fixes pressure loss in central heating systems.
Super concentrated formula for larger systems.
Safe for use with all metals and materials.
No need to shut down heating systems.
Biodegradable and environmentally friendly solution.
Easy to use, just pour and go.
Average Rating out of 5:
Price Range: $39.99
Size: 500 ml
