when can coolant and water pump lubricant be installed after using bar's head gasket product?

Doesn't really matter. Bar's head gasket repair liquid mixes with coolant anyway so you don't really care if you do it before or after. The point is you must have enough space for the Bar's stuff to get in the system. You have to remove a quart of coolant from the radiator so it can accommodate the Bar's liquid when added. If you are adding pump lubricant then you have to remove more coolant. Hope this answers your concern.

Can I add this to a clean cooling system that already has the Subaru coolant additive in it?

If it is a Subaru stop leak product we would not, if just the Subaru coolant is in the system and no additive for stopping leaks than that is perfectly fine to add. Please follow all instructions and dosage recommendation on the product. If you have any other technical questions, feel free to contact our Technical Service Professionals at 800-345-6572 or if you would prefer you can use the contact us page on our website.

Safe for a 2011 bmw 760li?

Yes, your vehicle is a good candidate for this product if it can idle for 20 minutes without overheating or having to add coolant. Use on ALL water cooled gasoline and diesel engines. Heavy duty formula works on aluminum and cast iron heads & blocks, along with sealing all other engine cooling system leaks better than a traditional stop leak. This includes repairing head gaskets, cylinder heads, intake gaskets, cracked blocks and freeze plugs. Use with ALL types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water.

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🚗💨 Fix leaks fast, save big, and keep rolling with confidence!

TRUSTED BY MILLIONS - Over 2 million bottles sold—join the savvy drivers saving time and money.
MULTI LEAK PROTECTION - Effectively seals block leaks, cracked cylinder heads, and blown gaskets.
COMPACT READY TO USE - Four-pack with easy application—perfect for emergency roadside fixes or scheduled maintenance.
DIY HEAD GASKET SAVIOR - Skip the costly shop visit and fix leaks yourself in under an hour.
ADVANCED CHEMICAL SEALANT - Sodium silicate formula penetrates and hardens to stop leaks permanently.

Bar's Leaks Block Seal Head Gasket Fix (Pack of 4) is a professional-grade chemical solution designed to repair blown head gaskets, block leaks, and cracked cylinder heads quickly and affordably. Its antifreeze-compatible sodium silicate formula penetrates and hardens to seal leaks permanently, enabling drivers to avoid expensive repairs and downtime. Trusted by over two million users, this easy-to-use product gets you back on the road in under an hour.

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TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

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Fantastic and great service. Shipping was faster than expected.

1 week ago

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3272 DH

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Moroccostore

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TrustScore 4.5 | 7,300+ reviews

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Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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3 weeks ago

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Manufacturer	Bar's Leaks
Brand	Bar's Leaks
Model	1111-4PK
Item Weight	1.6 pounds
Product Dimensions	2.6 x 2.6 x 9.4 inches
Item model number	1111-4PK
Manufacturer Part Number	1111-4PK

Bar's Leaks Block Seal Head Gasket Fix (Pack of 4),1111-4PK

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