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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🛠️ Fix leaks like a pro—because your ride deserves the best!

BULK REPAIR READY - Six 16.9oz bottles ensure you’re always stocked for multiple rear main seal fixes
TIME COST SAVER - Avoid expensive mechanic visits by restoring seals yourself with professional-grade product
CONCENTRATED FORMULA - High-strength seal repair concentrate penetrates and rejuvenates seals effectively
TRUSTED BRAND ASSURANCE - From Bar’s Leaks, a leader in automotive seal repair solutions trusted by pros
POWER PACKED COMPATIBILITY - Works seamlessly with 12V vehicle systems for reliable performance

Bar's Leaks 1040-6PK Rear Main Seal Repair Concentrate is a professional-grade, 16.9oz formula designed to restore and rejuvenate rear main seals. Compatible with 12V vehicle systems, this pack of six bottles offers a cost-effective, reliable solution to prevent oil leaks and extend engine life, trusted by automotive experts worldwide.

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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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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.

€ 202.46

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Slovakiastore

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Manufacturer	Bar's Leaks
Brand	Bar's Leaks
Model	1040-6PK
Product Dimensions	19.3 x 8.64 x 5.08 cm; 3.16 kg
Item model number	1040-6PK
Manufacturer Part Number	1040-6PK
Voltage	12 Volts
Item Weight	3.16 Kilograms

Bar's Leaks1040-6PK Rear Main Seal Repair Concentrate - 16.9oz (Pack of 6)

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