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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Bar's Leaks Rear Main Seal Repair, 16.9 oz

Bar's Leaks Rear Main Seal Repair, 16.9 oz

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, no mechanic needed

⏱️Stops leaks within 100 miles/2 days

🛢️16.9 fl oz concentrated formula

AR$49533

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 never miss a mile!

TRUSTED SINCE 1947 - Proven leader in automotive seal repair with thousands of satisfied users and top rankings.
DIY FRIENDLY FORMULA - Simply add to your engine oil at oil change—no special tools or expertise required.
FAST ACTING LEAK STOPPER - Most leaks sealed within 100 miles or 2 days—get back on the road faster.
SEAL LIKE NEW DRIVE LIKE NEW - Restores worn and dried rear main seals to factory condition without costly repairs.
UNIVERSAL ENGINE COMPATIBILITY - Works with gasoline, diesel, synthetic, and high mileage oils for all engine types.

Bar's Leaks Rear Main Seal Repair is a 16.9 oz concentrated liquid additive designed to restore and seal rear main, timing cover, and camshaft seals. It stops oil leaks quickly—usually within 100 miles or 2 days—by rejuvenating worn seals and hard-to-stop leaks. Compatible with all gasoline and diesel engines using conventional, synthetic, or high mileage oils, this easy-to-use formula requires no mechanic and helps avoid costly repairs, making it a trusted solution since 1947.

Specifications

ASIN	B00754T6TK
Best Sellers Rank	#6,271 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

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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

2 weeks ago

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AR$49533

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered 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 Argentina.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

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Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

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