Is this safe for diesels, specifically the Duramax 6.6L?

Yes..... According to Bars Product, this is compatible with all engines and engine oils.

Can you use this with synthetic oils

Yes, I have used it with synthetic oil with no issues.

What it does with my other gasket that has not have a leak?

If I'm understanding your question correctly.... you would like to know what effect this has on gaskets that are not leaking? The answer is nothing..... Thank you Eric

Is this safe to use with other gas additives such as seafoam, lucas?

Yes there is no problem. This gets poured into your oil crankcase not into your gasoline. Seafoam usually gets poured into your gas tank to clean injectors and cylinder walls sometimes you can put it in the crankcase just about 4 oz to clean junk this does not stop any leaks usually done 100 or 200 mi before an oil change. Lucas has many products some that are injector cleaners that go into the fuel tank some that are oil stabilizers or stop leaks or friction additives that go into your oil crankcase you can have Lucas oil additive/stop leak and bars leak in your oil crankcase they don't interfere with one another

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Rear Main Seal Repair 1040

Product ID: 3673728

Details

Brand
Bar's Leaks
Item Weight
1.1 pounds
Liquid Volume
16.9 fluid
Package Information
Bottle
Recommended Uses For Product
Fleet and

⛽Stops leaks in 100 miles

🔧Easy add-in at oil change

🛢️16.9 oz concentrated formula

377 kr

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Sold byAmazon NorwayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Fix leaks like a pro—without the shop visit!

TRUSTED SINCE 1947 - Proven formula with 3,000+ 4-star reviews—join the leak-free community.
SIMPLE DIY SOLUTION - Just add to crankcase during oil change—no special tools required.
LEAK PROOF CONFIDENCE - Seals rear main, cam, and timing cover leaks fast—no mechanic needed.
DRIVE LEAK FREE SOONER - Most leaks stop within 100 miles or 2 days—get back on the road ASAP.
UNIVERSAL ENGINE COMPATIBILITY - Works with gasoline, diesel, synthetic, and high mileage oils.

Bar's Leaks Rear Main Seal Repair is a 16.9 oz concentrated liquid additive designed to quickly seal rear main, cam, and timing cover oil leaks. Compatible with all gasoline and diesel engines and oil types, it stops most leaks within 100 miles or 2 days after adding to the engine crankcase during an oil change. Trusted since 1947, it offers an easy, affordable DIY fix that prevents costly repairs.

Specifications

ASIN	B00754T6TK
Best Sellers Rank	#5,651 in Automotive ( See Top 100 in Automotive ) #16 in Fuel Additives
Brand	Bar's Leaks
Brand Name	Bar's Leaks
Container Type	Bottle
Customer Reviews	4.2 out of 5 stars 3,014 Reviews
Global Trade Identification Number	00046087010402
Included Components	One bottle Bar's Leaks Rear Main Seal Repair
Item Form	Liquid
Item Type Name	Bar's Leaks Rear Main Seal Repair
Item Weight	1.1 pounds
Liquid Volume	16.9 fluid ounces
Manufacturer	Bar's Leaks
Model Number	1040
Number of Items	1
Package Information	Bottle
Part Number	1040
Recommended Uses For Product	Fleet and plant maintenance.
Specific Uses For Product	Fleet and plant maintenance.
UPC	046087010402
Unit Count	16.9 Ounce
Warranty Description	No

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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.

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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.

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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377 kr

Duties & taxes included

In stock

Sold byAmazon NorwayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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