Do you add it to your car, even if your oil is currently full?

You add it in substitution to oil making sure you don't overfill, right to the upper fill line is perfect & a little over is still ok.

do i need to flush this after leak is fix?

No don't flush. It will come out when you need an oil change.but it would have done its job on that leak..

who do i get a hold of for this guarentee?

You have to directly contact the manufacturer, fill out a form, with proof of purchase, and send it back to them within 60 days

will this stop oil leak on a 2005 hyundia santa fe with 3.5l engine?

I actually called the blue Devil company about a minivan with an oil leak. They said " absolutely". It did slow down the leak.

Bluedevil Rear Main Sealer 8 Ounce 00234

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🛡️ Seal the deal, drive leak-free—join the elite who trust BlueDevil!

DRIVE RESTORE - Restores dried and cracked seals dynamically as you drive—no downtime needed.
SEAL SAFE FORMULA - Free from harmful petroleum distillates, protecting your engine’s rubber seals.
LEAK PROOF CONFIDENCE - Permanently seals rear main leaks so you never worry about oil drips again.
UNIVERSAL ENGINE ALLY - Works seamlessly with gasoline & diesel engines using synthetic or conventional oils.
EFFORTLESS APPLICATION - Just pour into your engine oil—no mechanic required, no extra maintenance.

BlueDevil Rear Main Sealer is a powerful, easy-to-use liquid formula that permanently repairs rear main seal leaks by restoring damaged rubber seals while you drive. Compatible with all engine types and oils, it offers a safe, maintenance-free solution to keep your engine oil where it belongs.

Specifications

ASIN	B0079JX4JO
Best Sellers Rank	#34,199 in Amazon Launchpad ( See Top 100 in Amazon Launchpad ) #378 in Fillers, Adhesives & Sealants
Brand	BlueDevil Products
Brand Name	BlueDevil Products
Colour	Blue
Compatible Material	Rubber
Country of Publication	USA
Customer Reviews	4.1 out of 5 stars 3,384 Reviews
Global Trade Identification Number	00891838002348
Included Components	1 x 8 Oz. Bottle
Item Dimensions	15.2 x 6.4 x 6.4 Centimeters
Item Form	Liquid
Item Type Name	Rear Main Sealer
Item Weight	8 Ounces
Item dimensions L x W x H	15.2 x 6.4 x 6.4 Centimeters
Manufacturer	BlueDevil Products
Manufacturer Part Number	00234
Material	Rubber
Material Type	Rubber
Model	00234
Number of Items	1
Number of Packs	1
Style	Compact
Style Name	Compact
UPC	891838002348
Unit Count	8.0 Ounce
Water Resistance Level	Waterproof

Reviews

D**E

As advertised

I used this 2 times now the leak never came back. The first time I used it I was really sceptical about this product still leaking for two days but as I drive along the leak suddenly disappeared. So when I did my oil change I pour another bottle no more leak up to now. I think it does its job kudos to the seller and kudos to bluedevil.

14.08.2022

S**E

This works

96 F-350 with 460 engine. Truck would leak a silver dollar spot when it sat. Used Blue Devil with a fresh oil change of Valvoline high mileage, it too has seal conditioners. It stopped leaking! It doesn't happen right away. Put about 700 miles on before it completely stopped.

1.07.2026

C**C

It worked well for a couple of months. Then ...

It worked well for a couple of months. Then again, so did a less expensive product from the local auto parts store.

21.01.2018

A**Y

Money wasting not work no effect

Money wasting and very dangerous for turbo cars

28.03.2026

G**X

Good

Good product

7.02.2026

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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€ 84.49

Duties & taxes included

In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to France.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago