BlueDevil Rear Main Sealer, 8 oz Bottle
BlueDevil Rear Main Sealer, 8 oz Bottle
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BlueDevil

BlueDevil Rear Main Sealer, 8 oz Bottle

BlueDevil Rear Main Sealer, 8 oz BottleBlueDevil Rear Main Sealer 8 oz Bottle
Count:1

Key item features

  • Brand: BlueDevil for high-quality automotive solutions
  • Permanent seal for oil leaks in rear main gaskets and seals; repairs and reconditions damaged rubber seals to like-new conditions
  • Easy to use Pour-N-Go formula
  • All leaks are sealed while the vehicle is being driven; works in gas or diesel engines
  • Suitable for timing cover leaks offering a cost-effective solution
  • Ensures longevity and performance of vehicle engine components
  • Compatible with a wide range of vehicle models for versatile use
Current price is $15.97$2.00/oz
Price when purchased online
  • Free 90-day returns
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About this item

Product details

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Customer ratings & reviews

4.2 out of 5 stars
stars157 ratings62 reviews
How item rating is calculated
1.4
1.7
1.3
1.7
2.9
2.5
  1. 5 stars66% (104)
  2. 4 stars11% (17)
  3. 3 stars8% (12)
  4. 2 stars4% (6)
  5. 1 star11% (18)

Reviews summary

Neutral

  • : Can be affordable for some, but steep for others.
  • : Effective for some, inconsistent for others.

Cons

  • : Fails to completely stop larger leaks.
  • : Fails to completely stop oil leaks in some cases.
  • : Prone to oil leakage over time.
  • : Seal replacement can be expensive and time-consuming.
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Showing 1-3 of 62 reviews

May 2, 2026
Larry
Item details
Count: 1
5 out of 5 stars review

Verified Purchase

Amazing product

This stuff is amazing. I have personally stopped stubborn rear main oil leaks in two vehicles with this product. I have recommended it to numerous family and friends. If your rear main seal is leaking, don't settle for cheaper products. This will take care of your problem.

Helpful?5W9YNK7MISIR133909249
Jan 16, 2026
SGH
Item details
Count: 1
5 out of 5 stars review

Verified Purchase

Saved me a lot of money.

My car was loosing a lot of oil ..I mean it was really pouring out. My Brother is a mechanic and he said my engine or transmission would have to removed to fix the oil leak or I could try the BlueDevil Rear Main Sealer .I purchased the sealer on Walmart.com .It was really easy to use , I did it myself . I poured the Blue DEVIL in my Engine and it worked immediately in less then two days it sealed and my car had stopped Leaking oil. It saved me a lot of time and money .

Helpful?5W9YNK7MISIR133909249
Apr 11, 2026
Walmart customer
Item details
Count: 1
5 out of 5 stars review

Verified Purchase

Yes, it's worth the price!

2 treatments completely sealed my 200k mile chevy truck transmission rear main seal. Note I am using conventional oil so not sure how this would work with synthetics. I used other brands which did not work but Blue Devil did the trick!

Helpful?5W9YNK7MISIR133909249