I took advantage of the early-March warm-up and got the addition concrete floor sealed. I used Eagle Armor Seal, a glossy, low-VOC, water-based urethane on everything but the shower, which got Eagle Natural Seal, a waterborne penetrating water repellent that keeps the anti-slip texture of the sponge-finished concrete. I used my infrared digital thermometer to verify that the slab was at least 50°F per the instructions. It ranged from 53 to 57 throughout the 7-day process: 1 day to shop-vac and wet-mop, 2 days to dry, 1 day to do the shower floor, and 3 days to lay down 3 coats. I used an 18” roller which made pretty fast work of it.
The finished product after two weeks of curing — we are quite pleased with the results. This was also a major bottle neck to moving forward with the baseboards, galley cabinets, and loft flooring. (The flip side is that I am now the major bottleneck!)