SKU: 83642912652

RISLONE Block Seal Permanent Head Gasket Fix 41111

Sale price$86.66 Regular price$96.29
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

RISLONE Block Seal Permanent Head Gasket Fix 41111Rislone Block Seal Head Gasket Fix is the easiest solution to stop head gasket coolant leaks. No draining of the cooling system is required. One step formulation contains a combination of antifreeze compatible sodium silicate sealing liquid and various size gasket sealing particles which penetrate gaps and cracks then harden to permanently stop leaks. This works because of the extreme heat inside the combustion chamber (2750C) that acts as a catalyst

Rislone Block Seal Head Gasket Fix is the easiest solution to stop head gasket coolant leaks. No draining of the cooling system is required. One step formulation contains a combination of antifreeze compatible sodium silicate sealing liquid and various size gasket sealing particles which penetrate gaps and cracks then harden to permanently stop leaks. This works because of the extreme heat inside the combustion chamber (2750°C) that acts as a catalyst to permanently harden the material to make it stronger than the actual head gasket itself. Your vehicle is a good candidate for this product if it can idle for 20 minutes without overheating or having to add coolant. 

  • Safely Seals Gasket And Other Severe Leaks
  • Quickly and Permanently Stops Coolant Leaks
  • One Step—No Draining Required—Easy To Use
  • Use with ALL types of traditional or extended life coolant

Dosage & Directions

Dosage
One bottle treats cooling systems from 7.6 liters to 15 liters. Use ½ bottle for cooling systems from 3.75 liters to 7.5 liters. For larger systems use one bottle for every 15 liters of cooling system capacity. Most 6 and 8 cylinder engines will use one bottle, and most 3 and 4 cylinder engines will use ½ bottle.

Tip: If direct access to radiator is not available and if overflow tank is pressurized, you can install in tank.

Directions

  1. Allow engine to cool. Make sure engine is cool enough so radiator cap can be safely removed.
  2. Fill radiator and overflow tank to proper level and reinstall radiator cap.
  3. Start engine.
  4. Turn heater on hot and fan on high.
  5. Idle engine for 15 minutes.
  6. Allow engine to cool so cap can be safely removed.
  7. Top off radiator and leave Rislone Block Seal Head Gasket Fix in cooling system for continued protection. Drive vehicle as normal.

Cooling systems that are dirty or partially clogged should be flushed before usage. Protect from freezing. Protect bottle from freezing.

Compatibility

Use with ALL types of 50-50 mix antifreeze including conventional green or blue (Silicate-Based) and extended life red/orange or yellow (OAT/HOAT) coolant, and/or water.

Suitable for use in petrol, diesel, turbo, LPG and racing engines.

Frequently Asked Questions

Can Rislone Head Gasket Fix be installed in existing antifreeze?
Yes, it is compatible with ALL types and brands of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water. Systems that are dirty or partially clogged, a flush is recommended before use.

Can it be installed in a diesel engine?
Yes, it works with ALL gasoline and diesel engines.

How does this type of product work?
Rislone Head Gasket Fix formulation contains a combination of antifreeze compatible sodium silicate sealing liquid and various size gasket sealing particles which penetrate gaps & cracks and harden to permanently stop leaks.

What if I don’t have direct access to the radiator?
If direct access to radiator is unavailable and if reservoir / overflow tank is pressurized, you can install in tank. Otherwise remove top hose where it connects to the top of the radiator and install product in hose. Reattach hose and tighten clamp.

Does Rislone Head Gasket Fix permanently repair leaks?
Yes, it is a permanent solution for your cooling system leaks. What do we mean by permanent? It is not designed to be temporary, or a quick fix like other brands. Just like replacing a head gasket will not last forever, neither will Head Gasket Fix. Millions of bottles have been sold since the product was developed in 2004 successfully sealing leaks for many years and tens of thousands of kilometres.

Do I need to drain my radiator after the leak has been repaired?
No, top off radiator and leave Rislone Bock Seal Head Gasket Fix in cooling system for continued protection and drive vehicle as normal.

What are the dosage recommendations?
One bottle treats cooling systems from 7.6 liters to 15 liters. Use ½ bottle for cooling systems from 3.75 liters to 7.5 liters. For larger systems use one bottle for every 15 liters of cooling system capacity. Most 6 and 8 cylinder engines will use one bottle, and most 3 and 4 cylinder engines will use ½ bottle.

Will Rislone Block Seal Head Gasket Fix plug my heater core?
No, Rislone Head Gasket Fix will not clog your clean heater core, it is safe and effective. If using Rislone Head Gasket Fix to stop heater core leaks, make sure you turn your heater control to HOT. Some vehicles have a valve that controls coolant flow through the core.

I accidently added the Rislone Block Seal Head Gasket Fix into my engine oil, what should I do?
Rislone Head Gasket Fix is only designed to be added to the cooling system. If the product is installed in the engine oil and the engine has not been started, in many cases you can remove the valve cover and drain the oil leaving the drain plug off. Then use an engine flush washing out the head keeping special attention to the oil return holes that run down to the oil pan. Clean these out and pour the engine flush down these holes flushing everything into the oil pan and out the drain hole. If the engine has been run, you need to take the vehicle to have a professional mechanic evaluate what can be done to clean the inside of the engine. This might include taking the engine apart to clean all of the parts.

Technical Information

SAFETY DATA SHEET
CODE: 41111
SIZE: 680G

    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
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    • Delivery to the USA:
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    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 83642912652

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    Victoria C.
    Lake Worth, US
    ★★★★★ 5
    My go-to shorts this summer
    Size: 30, Color: Athens Mid Short - Medum Indigo
    These are easily my favorite shorts this summer. The fit is super flattering and they have that classic Levi’s look that never goes out of style. The denim feels high quality and holds its shape without stretching out too much during the day. They’re comfortable once you break them in, and they pair well with pretty much anything. I also like that they’re not too short or too long—just the right length for everyday wear. Definitely worth it if you’re looking for a staple pair of denim shorts!
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    Reviewed in the United States on April 25, 2026
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    Carley
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    ★★★★★ 5
    Favorite Summer Shorts worn on repeat
    Size: 31, Color: Luxor Heat - Light Indigo
    These are my favorite shorts for summer. I have several pairs that I wear on repeat because they’re comfortable, flattering, and hold up really well. I ordered a size up from what I already have since I’m postpartum, but I ended up not needing it—my original size still fits me best. So I did return these, but only because of sizing, not the product itself. I do suggest sizing up 1 size from your normal size. I usually wear a 29 and have these in a size 30 and they fit great. They are a true jean material and not strechy. Highly recommend these if you’re looking for a reliable, go-to pair of denim shorts.
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    Reviewed in the United States on June 11, 2026
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    Krissy
    Lowell, US
    ★★★★★ 5
    Cute & Comfy
    Size: 28, Color: Athens Mid Short - Medum Indigo
    The only pair of shorts that actually fits really well! Coverage is perfect.
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    Reviewed in the United States on May 18, 2026
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    Allie
    Lake Worth, US
    ★★★★★ 4
    Cute - SIZE UP
    Size: 33, Color: Luxor Heat - Light Indigo
    these are super cute and look very flattering but they run SMALL. I used to wear 32s in Levi’s but lost 30 pounds this year so I ordered a size down and they didn’t fit at ALL. I reordered a size 33 and they still fit tighter. My Levi jeans in a 32 barely stay on me anymore but these are snug in a 33. They’re still super cute and comfy, guess it gives me room to size down into them for awhile lol
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    Reviewed in the United States on June 8, 2026
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    Cherie
    Lexington, US
    ★★★★★ 5
    I love these!
    Size: 30, Color: Athens Mid Short - Medum Indigo
    Wow! I got these for$20! They fit just like the 501 pants to me. . The only thing I'd change is s little less fraying on the front but other than that these are a broken in lived in look for $20!
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