The retaining compound is a must if you are replacing the injector cups

This is the stuff you need when doing cups, and only one bottle is enough for all 8 cups. See my review under injector cups as well.

This compound works great perfect amount for doing the complete job and it's very price friendly thanks yall

Item shipped to my door quickly without problems.

Excellent service, quick delivery, exactly what I ordered!
Thank you so much!

It is sealant. It worked. Great product.

The best there is , don't use anything else but this , dont be cheap , do it the right way the first time and the only time

Just not to brag but this tool made my job removal and installing the cups on my 2002 f250 a brease! I would not recommend using any other product. This tool is a must to install the cups correctly in you ride.

Loctite 620 is the only product I would use for injector cup retaining.

I ended up also using loctite 7649 as a primer since i was doing the job at low temps and the cure speed is unacceptably slow.