Is Alpaca wool waterproof?

As the title says, Is Alpaca wool waterproof? I have heard that it lacks some chemical in sheep wool so it is not as waterproof as wool (not that sheeps wool is very waterproof in the first place) But would Alpaca be worse? or better?

It depends a lot on the weave (or knit, as the case may be). But wool is not waterproof. It is somewhat water repellent. Also, it is not hydrophobic like polyester, so the fibers themselves do absorb some water. Merino is a bit better in that respect that "standard" sheep's wool. Wool of any type (or synthetic fleece, for that matter) is no substitute for a truly waterproof fabric. Infinitely better than cotton, though.

I have several big alpaca wool sweaters I got in South America and a couple of handknit NZ wool sweaters, as well as some socks and other things. I have never done a water test on them so I can't compare them.

I do know from experience that wool will absorb a certain amount of water, but still retain its insulating properties. My old wool socks are really good at this. I've worn a damp wool pullover and not been all that cold. Body heat will eventually dry wool out fairly rapidly. Wool is old school compared to fleece and other synthetics, but it is still, in my opinion nice to wear on occasion.