Flooring – Reduce Tiling Dry/Wait Times

Not really.

Drilling is an inherently noisy activity. There may be low noise drills, but the act of rubbing hardened steel against brick at high speed will make a lot of noise. Lower speeds will reduce the noise, but you will take longer to make the hole. Using the hammer action will increase the noise, so try and avoid that if possible.

The best you can do is talk to your neighbours and explain what you are doing and when you'll be working. Ask them if there are any times they'd prefer you not to drill and try to stick to these times.

I'm assuming you're doing large scale renovations to your house - so give them an idea of how long you'll be working on the project. If they can see an end in sight, they might be more forgiving of a bit of noise and disturbance now for a quiet life later.

According to the sealant data sheet, you can seal new grout after 48 hours.

For me I would play it safe if I could (do you have to be able to use this bathroom?), if the grout says no water for 7 days I would wait that long before sealing. That is probably overly cautious but then I don't get much work done during the week anyway so for me waiting until the next weekend is not a big deal.

After sealing I would wait 24 hours before getting it wet.