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

🔧Easy add-in at oil change, no disassembly

⏱️Stops leaks within 100 miles/2 days

🛢️16.9 fl oz concentrated formula

AR$48232

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Fix leaks fast, save big, and keep your ride leak-free!

NO MECHANIC NEEDED - Simply add to crankcase at oil change—no tools or tear-downs
TRUSTED SINCE 1947 - Proven leader in rear main seal repair with thousands of happy drivers
FAST ACTING LEAK SOLUTION - Most leaks stop within 100 miles or 2 days of driving
SEAL LIKE NEW DRIVE LIKE NEW - Restores dried, hardened seals to prevent costly repairs
UNIVERSAL ENGINE COMPATIBILITY - Works with gasoline, diesel, synthetic & high mileage oils

Bar's Leaks Rear Main Seal Repair is a 16.9 oz concentrated liquid additive designed to restore and swell worn rear main seals and other hard-to-stop oil leaks. Simply added to the engine crankcase during oil changes, it stops leaks within 100 miles or 2 days, compatible with all gasoline and diesel engines using conventional, synthetic, or high mileage oils. Trusted since 1947, it offers an affordable, mechanic-free solution to costly rear main seal repairs.

Specifications

ASIN	B00754T6TK
Best Sellers Rank	#6,754 in Automotive ( See Top 100 in Automotive ) #15 in Fuel Additives
Brand Name	Bar's Leaks
Container Type	Bottle
Customer Reviews	4.2 4.2 out of 5 stars (3,180)
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
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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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

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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