35-338

Introducing the Comstar 35-338 Hydro Seal Hydronic Leak Sealant, a high-performance, easy-to-use solution for sealing leaks in hydronic heating systems, including boilers and radiators. This advanced sealant is specifically designed for use in hydrostatic pressure applications, making it an ideal choice for professionals and DIY enthusiasts alike.

The Comstar 35-338 Hydro Seal is a one-component, moisture-cured, non-toxic, and solvent-free sealant. It comes in a convenient 16 oz. cartridge with a disposable tip, making application quick and efficient. The sealant cures underwater, eliminating the need for system drainage, and can be used in temperatures ranging from 40 F to 150 F.

This hydronic leak sealant forms a flexible, rubber-like seal once cured, ensuring a long-lasting repair. It is compatible with a wide range of materials, including steel, cast iron, copper, and PVC, and can seal leaks up to 0.015 inches in size. The sealant also provides excellent resistance to thermal shock, chemicals, and water, ensuring optimal system performance.

The application process for the Comstar 35-338 Hydro Seal is simple and straightforward. The cartridge can be easily connected to a caulking gun, and the sealant is extruded through the tip as needed. The disposable tip ensures minimal mess and ensures consistent bead size. Once the sealant is applied, it takes approximately 3-4 hours to cure underwater and 24 hours to cure in the air.

In summary, the Comstar 35-338 Hydro Seal Hydronic Leak Sealant is a versatile, easy-to-use, and effective solution for sealing leaks in hydronic heating systems. Its one-component, moisture-cured, and non-toxic formula ensures quick and efficient application, while its excellent compatibility with a range of materials and resistance to thermal shock, chemicals, and water make it a reliable choice for long-lasting repairs.

Comstar 35-338 Hydro Seal is a hydronic leak sealant designed for repairing leaks in radiators and boilers without the need for draining or disconnecting the system. Let's examine some pros and cons of using this product for your heating system.

1. Convenient: This sealant allows you to repair leaks without draining or disconnecting the system, saving time and effort.

2. Versatile: It can be used on various types of metals, including steel, cast iron, copper, and brass, making it a versatile option.

3. Effective: The sealant forms a strong bond and can seal leaks up to 0.032 inches in size.

4. Easy application: The sealant comes with an applicator tip for easy application, making the process less messy.

5. Cost-effective: It can save you money compared to the cost of replacing a leaking radiator or boiler.

1. Limited shelf life: Once opened, the sealant has a limited shelf life of 30 days.

2. Not suitable for large leaks: The sealant is not suitable for repairing large leaks or holes.

3. May require multiple applications: Depending on the size and location of the leak, multiple applications may be necessary.

4. Possible odor: The sealant may emit a strong odor during the application process.

5. Caution needed: It is important to follow the instructions carefully to avoid over-application and ensure proper curing.

In conclusion, Comstar 35-338 Hydro Seal hydronic leak sealant can be a convenient and cost-effective solution for repairing leaks in radiators and boilers without the need for draining or disconnecting the system. However, it has some limitations, such as a limited shelf life and not being suitable for large leaks. It is important to consider these factors and follow the instructions carefully to ensure a successful repair.

Recommendation: If you have a small leak in your radiator or boiler and prefer not to drain the system, Comstar 35-338 Hydro Seal may be a good option for you. However, if you have a large leak or prefer a more permanent solution, you may want to consider other options such as replacing the damaged component or using a different type of sealant.

Details:

Enhances system longevity: helps maintain optimal system performance by preventing leaks and minimizing wear tear, reducing maintenance costs over time. This easy-to-use solution offers a safe, non-hazardous formula that protects all system components while enhancing overall efficiency. Specifications: hydronic system sealant. Its safe, non-hazardous formula ensures compatibility with all hydronic systems, making it a must-have solution for reliable heating and cooling performance.

Usage: quick and easy application, no dismantling required. Closed-loop hydronic systems. Perfect for: residential commercial boilers. Safe non-hazardous: crafted with a non-toxic, non-hazardous formula that won't harm system components, making it safe for all heating and cooling applications.

Formula: non-hazardous, safe for all system components. Fast easy application: simply add directly to the system for quick, hassle-free sealing. Compatible with all hydronic systems: works effectively with boilers, radiators, and closed-loop heating cooling systems, ensuring broad compatibility reliability. Application: seals leaks in boilers, radiators, and closed-loop systems.

Preventing leaks prolonging system life. Works efficiently in boilers, radiators, and piping systems. Reliable efficient hydronic system sealant: ensure leak-free performance with our advanced hydronic system sealant, designed to seal and prevent leaks in heating cooling systems. Stops leaks instantly: designed to seal and prevent leaks in hydronic systems, ensuring long-lasting performance without costly repairs.

Radiators heating systems.

specifications centrafurn:

• brand: Comstar
• mpn: 35-338
• part type: System
• unit type: Oz
• unit quantity: 16
• materials sourced from: United States
• upc: 024924353387

returns centrafurn:

• method: money back
• policy: returns accepted
• time: 30 days
• paid by: seller

offer centrafurn:

• prices: $18.30–$27.99
• item condition: New
• sold #: 12
• options: ship-to-home
• started: october 15, 2025
• availability: in stock

payments centrafurn:

• credit card: mastercard
• wallet: google-pay
• other

seller centrafurn:

• rating: 100.0%
• city: college point, new york
• # reviews: 28

general centrafurn:

• category: Home & Garden > Heating, Air > Cooling Systems > Central Furnaces

shipping centrafurn:

• transit: 5-12 days
• service: usps ground advantage
• class: standard
• carrier: usps
• type: calculated

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