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Rislone
Rislone Radiator Stop Leak Concentrate (41196) 325ml | Fast Radiator Cooling System Leak Repair for India
Concentrated radiator stop leak for small to medium cooling system leaks. Fast results.
volume
325ml
application
Radiator / cooling system
treats
Up to 10L cooling system
₹1,900
+ 18% GST
Total incl. GST: ₹2,242
Free shipping across India
14-day returns
Authorized Distributor
Official dealer since 2014
100% Genuine
Sourced directly from Rislone
Replacement Warranty
Defective unit replaced, not repaired
Direct Support
About This Product
Why the Rislone Radiator Stop Leak?
A slow coolant loss — finding the level down slightly each week without a visible puddle — is usually a pinhole leak in the radiator or a weeping hose connection. The Radiator Stop Leak Concentrate circulates with the coolant and deposits at leak points to seal them. For a vehicle showing slow coolant loss without obvious external leaking, this is the correct first treatment.
How It Works
The 2-step process explained
1
Circulation
Sealing compounds circulate with the coolant to reach all parts of the system.
2
Leak Sealing
Compounds deposit at leak points — where coolant is escaping — and polymerise to form a flexible seal.
How To Use
Step-by-step instructions
Add to the coolant reservoir or radiator with engine cold.
Run the engine to operating temperature.
Leaks typically seal within 1–2 drive cycles.
Check coolant level after 24 hours — if still dropping, use Liquid Aluminum Stop Leak for a more durable repair.
Compatibility
Works with these vehicles
Compatible vehicles — common examples. If your vehicle is not listed, ask Arjun below — it almost certainly still works.
All cars with small radiator leak
Pinhole or seep leaks
Coolant
Heater core small leaks
Foggy windscreen from coolant
Coolant
Don't see your vehicle? Ask Arjun — tell him your make, model and year for a direct answer.
Not suitable for: Major radiator leaks or burst hoses. Aluminium radiators with significant leaks — use Liquid Aluminium Stop Leak.
How It Compares
vs other options
vs Liquid Aluminum Stop Leak: The 41196 is the first treatment for minor coolant loss. If the leak is more persistent, step up to the Liquid Aluminum Stop Leak (41186) which creates a more durable metallic seal.
FAQ
Common questions
Are Rislone additives safe for Indian vehicles?
Yes. Rislone is an American brand formulating automotive additives since 1921. Their products are designed to be compatible with all modern engine oils, coolants, and transmission fluids. They are sold in over 70 countries and are safe for Indian petrol and diesel engines.
Can I use a stop leak additive as a permanent fix?
Stop leak additives condition rubber seals to swell slightly and re-seat. They work on slow seeps and minor leaks and the effect can last 30,000-50,000km. They are not a replacement for a mechanical repair on a major leak — but for minor seeps, they are a legitimate and commonly used solution.
Will fuel additives void my car's warranty?
No — adding a fuel system cleaner to the tank is no different from using a different petrol pump. Indian car manufacturers do not prohibit fuel additives. If a dealer ever claims this, ask for the specific clause in the warranty document.
How often should I use a fuel system cleaner?
Once every 10,000-15,000km or approximately once a year for normal use. If you use a specific station known for poor quality fuel, every 5,000km is reasonable. The cost is ₹900-2,400 and it takes 30 seconds to add to the tank.
Is naredi.in an authorized dealer?
Yes. naredi.in is the authorized distributor in India for CTEK, Rislone, OzCharge, Autool and Foxwell. Products are sourced directly from the brands — not grey market imports. Warranty is handled by naredi.in directly in India.
What is the return policy?
14-day returns from the date of delivery, hassle-free. Contact naredi.in via WhatsApp at +91 93112 11157 to initiate a return.
How long does shipping take?
Free shipping across India. Metro cities typically 2-3 days, other cities 3-5 days. Tracking is provided once dispatched.
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Ask Arjun
Not sure if this is right for your vehicle?
Tell Arjun your vehicle and situation — he'll give you a straight answer, not generic advice.
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