Anyone have experience using elastomeric (Lanco brand) on a concrete roof? This is an old but sturdy concrete tile roof, that was treated and sealed some years ago. I am just sealing some cracks and giving it the once or twice over.
Does it really just cover 50 sf per gallon? And does it need 2-3 coats? If so, I am going to need about 25 gallons--seems like a lot.