Rightly or wrongly, I'm no Chemist!, I use this grease for anything that has a fixing that I may need to remove again, plastic fittings or rubber components. Some greases are known to be harsh to rubber products, my opinion is that if it's designed to be used in harsh environments such as CV joints it will be sticky enough to stay where it is needed without falling out (like an oil lubricant would), is extremely resistant to shear forces that you get with gears/metal faces grinding against each other so a steering rack shaft would be ideal and just as importantly if it's designed to be within the rubber CV boot without degrading the rubber then it will function the same inside the steering rack and not attack the rubber gaiters.
If I'm putting a cross-member back on, or wing bolts, or bumper bolts etc etc i.e. anything that could be susceptible to damp and seizure/rust formation then a dab of grease makes it much more likely that in 5 years time when you come to remove said bolt you have a better than average chance of it being successful!
Copper grease has its' place of course especially on fixings where heat is an issue, also it's great as gasket sealing paste on exhaust flanges as doesn't go hard and crack like exhaust paste does...but in equal measures I hate the stuff as it gets everywhere and once on your clothes or sleeves it is easily transferred to car seats, and is a real bugger to shift, being heat resistant the washing machine has a hard time cleaning it off too..
https://www.ebay.co.uk/itm/Granville-CV ... SwEGBcThOB