Water vapor in an engine is not an issue if the engine comes up to operating temp, as parts like the combustion chamber, valves, piston dome, and it's underside.
This keeps it in a gas, and expelled, either out the exhaust port, or carried out of the crank case by the blow-by flow.

Compression makes the water vapor (humidity) condense in the cylinders, and some is always pushed by the rings by blow-by.

Even in the driest places on earth, like the Serra desert, at 12% humidity, compressing air will actually form water droplets.
When an engine shuts off while hot, the water evaporates quite quickly, due to hot parts, and oil. Oil temps are typically way higher than coolant temp.
Now if you start the engine, shut it off before coming up to temp, there is not enough heat to evaporate the water out, and if done repeatedly, rust will start forming on steel parts.

On a firearm, you can oil up the steel parts, and normal humidity will cause rust, if you are using an oil made for an engine opposed to one meant for a firearm.

Can't seem to find 'Royal CLP' on the net

It’s Royco

https://skygeek.com/anderol-634-1gl-royco-634-cleaner-preservative-lube-1-gal.html


I don’t know how different Radco is, but this is the latest mil-spec. I can’t tell any difference between this and the same spec Breakfree.

how do you like it? does it dissipate in 100 rounds like normal standard CLPs?

I’ve never had any mil-spec CLP dissipate in 100 rounds.

This fellow shared the links to the Royal CLP. I ended up ordering some of it to split with some buddies. So far no complaints.

It does appear to be different from Radco and G96 CLP’s. Radco is pretty runny compared to this stuff but also does a great job overall.

It does tend to stay put and does not evaporate or burn off easily.

Does a good job on making cleanup easy as well. Only complaint is the smell is strong but no adverse reactions.

63460E is an old CLP spec going back to 2006. The latest version is 63460F

I’d check with the vendor. Might be an old product description.