The plan is to have Diamond Clear Coat cover 600 sq ft of concrete floor in a building that is in a remote location so I will have to sleep/spend the night after the coat has been applied. Is it safe to stay in the building the day/night of application with windows open? Will the fumes/smell be too much after 8 hours of application even if in another room of building with closed door in between?

How strong the odor is after 8 hours depends heavily on how much air is moving through the building, so we can't give you a set number of hours. A building with windows open on opposite sides and a fan pulling air through will clear far faster than one with a single window cracked.

DiamondFinish Clear is a solvent-based, moisture-cured urethane. The odor comes from the solvent leaving the film as it dries. Always apply it in a well-ventilated area. Once fully cured (at least 7 days), DiamondFinish Clear is non-toxic.

If you plan to stay overnight, these steps help:

• Open windows on opposite sides of the building and put a box fan in one window blowing out, so fresh air pulls through the coated area. Keep the fan from blowing straight across the wet floor, since low air flow over the surface is best while it cures.

• Apply early in the day. DiamondFinish Clear is typically dry to the touch in 2 to 4 hours, depending on temperature and humidity, so an early start gives it the most drying time before night.

• Sleep in the room farthest from the floor, with the door closed and that room's own window open.

• If you still smell strong solvent odor in that room at bedtime, the air isn't moving enough. Plan on sleeping somewhere else that night.

Also pick your day with the weather in mind: apply between 50 and 82°F, and avoid rainy or high humidity conditions, which can bubble the film.

Before you get started, we strongly recommend reading through the complete application directions. The links are included below. The steps above are a quick orientation, not a substitute for the full directions.

• DiamondFinish Clear

• DiamondFinish Clear Application Directions

• Clear Concrete Sealer Directions

If any other questions come up before or during the job, post them here and we'll help.