Copper Anti-Seize

[KTL]

Anybody use the Wurth CU 800 anti-seize? I use it occasionally and I find that it tends to become very thin and almost bleeds or doesn't stick to the fasteners very well. The cheapo silver paste Permatex stuff seems to be better. What's up with my copper stuff? Did I get a bad tube?

Reason I ask is because the copper anti-seize that's on the bolts that came out of the car (suspension bracket bolts to be specific) is much thicker and lasts quite well.

Thanks,

[pwd72s]

The brand I use is made by Bostik. "Never Seeze", regular grade. Comes in an 8 0z can with a dauber brush. Pretty thick stuff, a copper formula, rated to 1800 degrees.

[Doug Zielke]

Some brands of this stuff tend to separate if left on the shelf for a while. Before use, stir the can (or knead the tube) to mix it up.

[mgoldleaf]

Why does the "other" product's consistency change? Could be something to do with cross-viscosity when mixed with grease or dirt.

On a similar note, it would seem that the best product would allow the most "anti-seize" with the least effect on fastener preload.

Remember that with whatever product you use the torque needed to achieve the same clamping force changes and is roughly 2/3 to 3/4 that of the dry bolt. <100 ft-lb torque specification now = 70 ft-lbs>

I am sure someone has a better formula that I do...but it is something to keep in mind - especially with suspension parts .

/marc

[KTL]

Originally posted by Doug Zielke
Some brands of this stuff tend to separate if left on the shelf for a while. Before use, stir the can (or knead the tube) to mix it up.

That's exactly the problem with my stuff Doug. I have to squeeze a bunch out of the tube and mix it up before applying. Next time i'll get the brush in a can setup so it's easier to mix and not waste.

I assume the recommended torque values stated in the manuals include the use of anti-sieze where necessary. For example, the suspension bracket bolts for the front A-arms are torqued 35 ft-lb and they originally had anti-seize on them.

Thanks for the replies all.

[Bill Verburg]

I've got a container of high temp Never-Sieze, and some high temp NAPA brand antisieze they both brush on and have never thinned out over quite a few years on the shelves in my garages. Both seem to work equally well.

[Harold_89_911]

Permatex has the copper stuff too. A little more expensive than the cheapo silver stuff (I paid $10) but it works pretty well. My local parts store has it behind the counter as a special order for my Porsche mechanic. If he likes it, I don't question...