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K-Seal - Permanent Coolant Leak Repair Head Gaskets Radiators Cooling Systems

allcars-online
(190734)
Registered as a business seller
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£12.92
Condition:
New
More than 10 available2,894 sold
Breathe easy. Returns accepted.
People want this. 380 people are watching this.
Postage:
May not post to United States. Read item description or contact seller for postage options.
Located in: Birmingham, United Kingdom
Delivery:
Varies
Returns:
30 days return. Buyer pays for return postage. If you use an eBay delivery label, it will be deducted from your refund amount.
Payments:
    Diners Club

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eBay item number:292672808446
Last updated on 12 Jun, 2025 10:19:55 BSTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging ...
Type
Sealant
Manufacturer Part Number
K5501
Reference OE/OEM Number
HEAD GASKET REPAIR, K SEAL HYPER SEAL GASKET FIX RADWELD, BLOWN HEAD GASKET SEALANT LEAK FIX, DIESEL ENGINE HEAD GASKET SEALANT LEAK FIX, PETROL ENGINE BLOCK LEAK SEAL REPAIR FLUID
Volume
236mL
Brand
K-Seal

Item description from the seller

Seller business information

I certify that all my selling activities will comply with all EU laws and regulations.
VAT number: GB 813 3513 61
I provide invoices with VAT separately displayed.
CRN: 05210705
About this seller

allcars-online

99.5% positive Feedback•488K items sold

Joined Feb 2011
Registered as a business seller
Here at All Cars All Parts, we work with some of the biggest brands in the car parts aftermarket to offer you a wide range of high quality car parts and accessories at discounted prices guaranteed.We ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable postage cost
5.0
Delivery time
4.9
Communication
4.9

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Seller Feedback (199,328)

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  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    I had researched this product and was sceptical as i read a few fiesta owners of which i am one, saying the product had caused a few other issues, psrticularly i their heating system in the car. I was losing an incredible amount of coolant with a leak somewhere, i decided to take a chance. I've given it a month to see exactly what it did to the car. In my opinion it is absolutely amazing. I use my car all day every day, no coolant added since i got this product. Amazing thank you
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    Good quality and does the job in
  • *****- Feedback left by buyer.
    Past month
    Verified purchase
    I had a small leak in radiator, it’s not there anymore, it’s working
See all Feedback

Product ratings and reviews

Learn more
4.6
560 product ratings
  • 461 users rated this 5 out of 5 stars
  • 37 users rated this 4 out of 5 stars
  • 15 users rated this 3 out of 5 stars
  • 14 users rated this 2 out of 5 stars
  • 33 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 484 reviews
  • by ghostrider1964
    07 Jul, 2021Most favourable review

    The cheeper quicker hassle free alternative

    This was something recommended to me by a friend. and now my car love's me again. it's fantastic easy to use small enough to keep in your car as an emergency tool. if you're car is getting hot under the collar, try k-seal before going to a garage and it may save you hundreds in labour and parts and a lot of time too. all instructions for use are easily understandable, (warnings too) I wish I'd invented it.

    Verified purchase: YesCondition: New

  • by nicobhoy72012
    05 Dec, 2018Most critical review

    K seal

    Used in my ford mondeo mk4 diesel. and ended up choking up my radiator and heater matrix giving me bad back pressure and causing low or no flow through coolant system forcing coolant out expansion bottle also had no heating as heater matrix got choked up with the k.seal. ended up having to flush out full coolant system and radiator and matrix as was loosing coolant due to blockage and forcing coolant out of expansion bottle .maybe work for other cars but wouldnt recomend for mk4 mondeo 1.8tdci as caused a small coolant leak to turn into major problems before i added to coolant system could run car for 150 to 250 miles before adding coolant and after adding k.seal car overheated on a 2 mile run .

    Verified purchase: YesCondition: NewSold by: clickcarparts

  • by 0030dimsam55555
    07 Nov, 2017

    No fix because..

    Perhaps its a nice product but in my occasion did nothing because i had the type of head gasket problem that exhaust gases mix with coolant so because of the pressure no k-seal mixed with coolant can reach the head gasket leak

    Verified purchase: YesCondition: NewSold by: 123_autocare

  • by olliesixx
    14 Nov, 2017

    Tried them all

    Yes I've tried them all over the cars I've owned, I won't mention any brands, but this is the only one that jot only works, permanently works! Or at least plenty long enough to save up the cash to fix the job properly. Don't waste your time with others, this is the best!

    Verified purchase: YesCondition: NewSold by: the_car_parts_warehouse

  • by doormanjoel
    23 Oct, 2019

    Excellent if used correctly!

    If used correctly this works great this saved me over £1000 used on a super bike, will only seal small leaks so don't moan if it don't seal a massive hole , mix with coolant 1st and put directly in to radiator and DONT use too much, less is best I used just under half a bottle on a massive 1448cc superbike, those that moan about it clogging up parts used too much 👍

    Verified purchase: YesCondition: NewSold by: candccarspares2010

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