Ultraplan Lite is a polymer-modified, calcium-aluminate-based, lightweight, self-drying, self-leveling underlayment. It has been specifically designed for use for leveling substrates that are not rated to carry the full weight of a traditional self-leveling underlayment. Ultraplan Lite mixes easily and flows out to a suitable finish with a final dry density of about 67 lbs. per cu. ft. (1 073 kg per m3) at 28 days.