BASF recently launched the MasterSeal SL 100 in the United States, Canada, and Mexico. The new sealant is designed to help expedite construction project schedules and keep horizontal joints weather-tight, even in demanding conditions.

The self-leveling sealant is the newest offering in the MasterSeal line of sealants and waterproofing products.

How the Sealant Works

The sealant’s hybrid technology permits application to freshly placed (green) concrete as soon as 24 hours after forms are removed, compared with 21 days recommended for most sealants. This earlier access to job sites can allow contractors to save on labor costs.

The sealant can also be placed on damp concrete, helping minimize the impact of rain on project schedules. With tenacious adhesion to multiple substrates, such as concrete, metal, and stone, MasterSeal SL 100 can help simplify the sealant selection process.

Recommended uses include plaza decks, parking structures, balconies, industrial floors, driveways and garages, sidewalks, and numerous other horizontal joint applications.

The sealant has a skin time of 5-to-45 minutes, depending on weather conditions. This feature further shortens project schedules, because it requires less time to dry and reduces accumulation of dust and debris. The strong UV resistance results in a weathertight seal that retains its color over time. Additionally, it can be painted once it is cured, allowing for future flexibility.

Field Trials

Specialty waterproofing contractor The George D. Allen Co., based in Grand Prairie, Texas, took part in field trials for this product.

“During the sealant curing process, we noticed immediately how quickly this new hybrid material skins over. It took roughly five minutes to form a skin on the sealant surface,” said Doug DeSilvio, director of operations at George D. Allen. “Another positive for our company was the viscosity of the sealant. The new formulation makes it easier to gun the material. MasterSeal SL 100’s new formulation is contractor-friendly and will help expedite schedules and save time and money on call backs.”

The sealant is available in packages that are easy to open and reseal, according to BASF, thereby reducing material waste and saving labor. A video about the product can be viewed here.