Thanks for the comment and we are glad we could help!

Hey there Dominik, there is no cause for concern with using our tablets. We always say a chemical flush of the cooling system should be performed every 3-4 years as maintenance, if it's time to use a stop leak product and the system hasn't been flushed in that time frame we recommend doing so. These tablets are completely safe, and have been factory installed by various OEM's on the assembly line since the 50's. Our customer support team is available M-F 8am-5pm EST, and can be reached at 800-345-6572 if you need further assistance.

@@BarsleaksUSA OK. Perfect. Thank you for the response.

@@BarsleaksUSA Update. The tablets sealed the external seepage around the head gasket. Coolant level is holding. Great product! Thank you!

@@mayor399999999999999 Great to hear Dominik! If you ever need assistance again don't hesitate to reach out, or give our customer support team a call!

Yes the OEM's do install prior to selling vehicles. This product is not to be added into the overflow reservoir, it should be added directly to radiator. it is usual to get a bit of discoloration but not to the degree you are speaking.

@@BarsleaksUSA You must be in marketing. After putting 2 dissolved tablets per gallon of coolant capacity into my cooling system, I drained the coolant from the system. What was originally a bright and transparent green coolant came out looking just like motor oil. The coolant has turned brown and opaque. I had to flush and flush to get out the sand-like particles that the tablets create, and I doubt I will ever get them all out. Dude, let's face facts, there's no way OEM's are putting this stuff in their cooling systems from the factory. You will need to give hard proof of that claim because none of these companies ship their cars with mud-like coolant.

@@JetFire9 the OEMs would not be adding at the rate you are adding. They would be using a lower dosage. Our Preventive Maintenance dosage is one tablet per gallon. You have added as you are trying to correct a leak, which this product has proven over several decades and a countless amount of vehicles to do just that. We are sorry of your displeasure in the color of the coolant after adding the product.

@@BarsleaksUSA At 1 tablet a gallon, it’s still very dirty looking and tons of particles. Name a car that comes with these tablets from the factory, or stop lying.

@@BarsleaksUSA Elizabeth Holmes was telling everyone that her product was being used in active duty with the military. She was just found guilty and will be going to prison soon. Just say'n.