The Evolution of Self-Leveling Technology 101 will examine the five elements in leveling compounds, their significance, their importance in achieving desired characteristics and how that impacts the soundness of the subfloor and foundation. The binder is the mostimportant ingredient in any leveling compound which includes gypsum, Portland and calcium aluminate cement. Binders are the key to developing a material that is safe and stable. The geological and historical use of each binder will be reviewed from their development in the construction of historical buildings and presence in artifacts, to their use in modern architecture. Each type of levelingcompound will be explored, properties discussed, benefits and disadvantages acknowledged, and recommended applications for each typeexamined allowing the specifier to choose the best material and method for each job site. Participants will benefit from this instruction learning how to properly select the best suited leveling compound and will be able to make the best decision on appropriatemeasures to correct substrate challenges to properly prepare subfloors for successful, sustainable, environmentally friendly, soundflooring installations.