It sails like a different boat - but the square meter calculation didn't work for me.
It's quite involved and expensive to do a complete rebuild including 5 coats of Hempel High Protect II, but the first 80nm trip was a real experience. My boat has never been so fast, even though I didn't even reach the reefing point!
I had already applied Silic One to the saildrive two years ago and was very happy with it regarding fouling – practically nothing, or it could be easily removed with a sponge. That's why I did the whole boat this time.
The quantity calculation based on square meters didn't work for me. While I had 15% too much Hempel High Protect, the Primer Light and the Tie Coat were a good match in terms of calculation. But the Silic One calculation based on square meters yielded 15% too little, so I had to buy more locally.
Another disadvantage is the issue of durability. If you use the material relatively quickly, everything is fine. However, if you buy it in the spring to use it the following spring, you should bear in mind that a maximum storage period of 18 months is not much if the material is already 6 months old or more upon delivery.