Permatex 80038 Prussian Blue, .75 fl oz Tube

A very handy addition to any tool kit - I use this more than I thought I would. The blue is very deep so you can easily see it on the items marked. I even use it for tile jobs.

I Used it to level exhaust manifolds, apply with a paint brush to a sheet of glass and the high spots really stand out. Way better than trying to make it yourself and a little go's a long way. And you can use it on gears and bearings to check your shims. So I'll get a lot of future use out of it

Just switched the ring and pinion from a 3:42 to a 3:08 and this was ideal for helping show the mesh pattern between the pinion and ring when I was setting the backlash. There are no clunks or wines from the new axle after using this. Great price and every bit as good as the yellow paint alternative.

Product is as described and meets my expectations. Delivered on time in good condition.

This is not as visible as the paste some differential install kits come with but It does the job

This stuff came in handy for a few tasks on this last engine build. I was able to see where the Jesel belt drive was contacting the block to grind that part away so the cover set flush. I was also able to use some contrasting Dykem on my intake manifold and use this on my intake gaskets installed on the heads to see how much was needed to be massaged in the intake so that the ports matched my cylinder heads. So this is something that’s good to have around. Especially if your going to be building an engine and you have many aftermarket parts as with stacked tolerances ya never know what you might need to tweak or adjust to make things fit or do it works.

Worked prroperly. Recomend.

This worked well for what I needed to see, which was the engagement of a starter motor pinion with the ring gear on the flywheel. The blue colorant did clearly show what I needed to see.