Nulon Pro-Strength additives are a high performance range of engine and fuel additives that utilise advanced additive technology formulated specifically to maintain reliability and increase performance. Nulon Pro-Strength Rear Main Seal Stop Leak is a highly concentrated formula designed to rejuvenate dried, hardened and shrunken oil seals, bringing them back to life and reducing oil leaks. Nulon Pro-Strength Rear Main Seal Stop Leak also helps to repair valve stem oil seals, helping to reduce exhaust smoke on engine start up and take off. Easy to use, simply add 1 bottle for every 5L of oil at any time and idle engine for 1 minute. Nulon Pro-Strength Rear Main Seal Stop Leak is suitable for use with all petrol, diesel and LPG engines and is safe to mix with all oil types including mineral, semi-synthetic and full synthetic blends.
Nulon Pro-Strength additives are a high performance range of engine and fuel additives that utilise advanced additive technology formulated specifically to maintain reliability and increase performance. Nulon Pro-Strength Rear Main Seal Stop Leak is a highly concentrated formula designed to rejuvenate dried, hardened and shrunken oil seals, bringing them back to life and reducing oil leaks. Nulon Pro-Strength Rear Main Seal Stop Leak also helps to repair valve stem oil seals, helping to reduce exhaust smoke on engine start up and take off. Easy to use, simply add 1 bottle for every 5L of oil at any time and idle engine for 1 minute. Nulon Pro-Strength Rear Main Seal Stop Leak is suitable for use with all petrol, diesel and LPG engines and is safe to mix with all oil types including mineral, semi-synthetic and full synthetic blends.
Nulon Pro-Strength Rear Main Seal Stop Leak 500ml RMSSL
Nulon Pro-Strength additives are a high performance range of engine and fuel additives that utilise advanced additive technology formulated specifically to maintain reliability and increase performance. Nulon Pro-Strength Rear Main Seal Stop Leak is a highly concentrated formula designed to rejuvenate dried, hardened and shrunken oil seals, bringing them back to life and reducing oil leaks. Nulon Pro-Strength Rear Main Seal Stop Leak also helps to repair valve stem oil seals, helping to reduce exhaust smoke on engine start up and take off. Easy to use, simply add 1 bottle for every 5L of oil at any time and idle engine for 1 minute. Nulon Pro-Strength Rear Main Seal Stop Leak is suitable for use with all petrol, diesel and LPG engines and is safe to mix with all oil types including mineral, semi-synthetic and full synthetic blends.
Nulon Pro-Strength additives are a high performance range of engine and fuel additives that utilise advanced additive technology formulated specifically to maintain reliability and increase performance. Nulon Pro-Strength Rear Main Seal Stop Leak is a highly concentrated formula designed to rejuvenate dried, hardened and shrunken oil seals, bringing them back to life and reducing oil leaks. Nulon Pro-Strength Rear Main Seal Stop Leak also helps to repair valve stem oil seals, helping to reduce exhaust smoke on engine start up and take off. Easy to use, simply add 1 bottle for every 5L of oil at any time and idle engine for 1 minute. Nulon Pro-Strength Rear Main Seal Stop Leak is suitable for use with all petrol, diesel and LPG engines and is safe to mix with all oil types including mineral, semi-synthetic and full synthetic blends.
in 29 offers
The lowest price for Nulon Pro-Strength Rear Main Seal Stop Leak 500ml RMSSL right now is $28.20 at Automotive Superstore, compared across 21 retailers.
The all-time low was $18.50 on 22 Nov 2023 — today's price is 52% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 8 Sept 2026.
Last updated at 08/09/2026 20:43:29
Nulon PS Rear Main Seal Stop Leak 500ml RMSSL
Delivery between 9–21 Sept $10.95
Nulon Pro-Strength Rear Main Seal Stop Leak 500ml - RMSSL
Free 60-day returns
Nulon Ps Rear Main Seal Stop Leak 500ml Rmssl
Delivery $6.95
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Nulon Pro-strength Rear Main Seal Stop Leak 500ml
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
1 X Nulon Pro Strength Rear Main Seal Stop Leak 500ml Rmssl
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Nulon Pro-strength Rear Main Seal Stop Leak 500ml Rmssl
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Nulon Pro Strength Rear Main Seal Stop Leak - 500ml
Delivery $11.47
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
2 X Nulon Pro-strength Rear Main Seal Stop Leak 500ml Quality
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Nulon Rear Main Oil Seal Stop Leak 500ml - Rmssl Auto Part Workshop
Free delivery
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VPW - NULON 500ml Pro-Strength Rear Main Seal Stop Leak, Each
Delivery between Fri – Sat $34.35
originally posted on supercheapauto.com.au
Nulon have some great products but was not successful for my vehicle. I have a very small oil leak coming from within the bell housing that I suspect is the rear main seal, not enough of a leak to leave oil on the ground. Thought this product might eliminate the very minor leak that I had. Added the specified amount of stop leak into engine during an oil and filter change. Driven over 500kms and the small oil leak has not changed at all. Worth a shot, but didn’t work for me. I’ll just save to have a new rear main seal and clutch installed at a later date and hopefully the leak will continue to only be a very minor leak.
originally posted on supercheapauto.com.au
I read some negative reviews and almost didn't try it then thought what the heck I have a leaking rear main seal how bad could it get? The leak stopped the same day I added it and have the car a good 80km run, leaks just stopped.This Nulon one just stopped it in one go, very excited!I did another 200kms at high speed and no leaks overnight it is fixed!
originally posted on autobarn.com.au
Be aware that this product does not work on rope seals, the packaging says the product works on crank seals, cam seals and gaskets, suitable for Petrol LPG and Diesel Engines. It didn't work on my crank seal as it is rope type seal, nowhere is this mentioned. Save your $35. Told the store, no speak of refund.
| Capacity | 0.500 |
Nulon PS Rear Main Seal Stop Leak 500ml RMSSL
Delivery between 9–21 Sept $10.95
Nulon Pro-Strength Rear Main Seal Stop Leak 500ml - RMSSL
Free 60-day returns
Nulon Ps Rear Main Seal Stop Leak 500ml Rmssl
Delivery $6.95
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Nulon Pro-strength Rear Main Seal Stop Leak 500ml
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
1 X Nulon Pro Strength Rear Main Seal Stop Leak 500ml Rmssl
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Nulon have some great products but was not successful for my vehicle. I have a very small oil leak coming from within the bell housing that I suspect is the rear main seal, not enough of a leak to leave oil on the ground. Thought this product might eliminate the very minor leak that I had. Added the specified amount of stop leak into engine during an oil and filter change. Driven over 500kms and the small oil leak has not changed at all. Worth a shot, but didn’t work for me. I’ll just save to have a new rear main seal and clutch installed at a later date and hopefully the leak will continue to only be a very minor leak.
I read some negative reviews and almost didn't try it then thought what the heck I have a leaking rear main seal how bad could it get? The leak stopped the same day I added it and have the car a good 80km run, leaks just stopped.This Nulon one just stopped it in one go, very excited!I did another 200kms at high speed and no leaks overnight it is fixed!
Be aware that this product does not work on rope seals, the packaging says the product works on crank seals, cam seals and gaskets, suitable for Petrol LPG and Diesel Engines. It didn't work on my crank seal as it is rope type seal, nowhere is this mentioned. Save your $35. Told the store, no speak of refund.
Ignore the goober who called it a poor product. I'll change the rear main seal, (ie do it properly) when I change the clutch. I'll be putting an expensive clutch in it, so, money, and time, neither of which I want to spend on that task just now. It stopped the leak, and bought me time. I couldn't be happier, and yes I just recommended it to a friend
Didn’t know if the product would work or not. Was a bit sceptical but it worked very well. Would recommend to anyone. Top stuff
Rear main stop leak. This stuff works well. I have a leaking rear main seal on my VS. while it may not stop the leak completely, is does definitely slow it down. Initially, I used two cans, now I use one every oil change. I can recommend this product.
I had an engine oil leak and the mechanic told me it was going to be an expensive repair having to disassemble most of the engine to get to where the leak was, I put one bottle of Nulon's engine stop leak in instead and it fixed the leak with 24 hours! Four months later still no issues, saving me a small fortune.I'll be putting a bottle of Nulon Stop Leak in with every oil change from here on in.Thanks Nulon, a sensational product. 😁👌
After noticing a major engine oil leak on my 30 year old 1HZ landcruiser, losing 500ml over 2 weeks I decided to give Nulon rear main seal stop leak a go. After replacing the lost engine oil with Nulon rear main stop leak (2 bottles) I haven't noticed any oil loss after 5000ks and 5 month's . No guarantees it will work for all engines but I had a big win and I'm very happy.
Fantastic product , allowed my previously oil leaking car to pass registration. lolThe leak was small admittedly, but it stopped it completely.
Used this on an old Ford 302 Windsor which was leaving 6 to 7 drips of oil from the rear main after driving. After using this product and driving about a 100km’s there are now no drips on the ground. I wasn’t sure if this product would work but I am pleasantly surprised. Would definitely recommend for minor to moderate leaks.
| Capacity | 0.500 |
