Simple soap and water is enough to keep quarts clean, you don't have to overthink it. Even professionals recommend washing your quartz countertops with just soap and water.
No, quartz does not need to be sealed because it is not porous, meaning that there are no little micro-holes in it because it is an engineered stone and has no resin.…
Steam cleaning a quartz countertop will never damage it. Quartz countertops are built to withstand temperatures touching their surface up to 425 degrees.
You can, but it is going to take the edge off the knife before it ever hurts the countertop. Knives will get damaged over time, but the quartz will not.
We would not recommend it. You can get away with a cookie sheet, but if you put a hot pan down, it may discolor the quartz and damage or discolor the polymer…