Densifier question

[66ragtop]

The builder will be pouring the floor in my new shop in the next few days. I have decided to keep the plain concrete floor look but will be using a densifier to make spills easier to clean up and keep the dust down. My question is when do I apply the densifier?
Thanks
Brian

 

[LegacyIndustrial]

It can be applied directly after finishing or you can wait until the forms are stripped.

 

[66ragtop]

Which densifier should I use?

 

[LegacyIndustrial]

Basic densifier works well HD-36.
If this was outside I would recommend HD39 with built-in waterproofing agent.