Kemper System America, Inc.now offers a family of commercial-grade construction sealants to address a variety of applications for the Building Envelope. The family spans Kempertec Joint Sealant and three proven GreatSeal brands from STS Coatings, acquired by Kemper System in 2016.

The proven GreatSeal line includes two high-performance, multi-purpose products --GreatSeal PE-150 Joint Sealant and GreatSeal LF-100 Liquid Flashing – plus a liquid tape for use with Wall Guardian air barrier assemblies. 

“Kemper System is all about giving distributors and specifiers one solution for protecting the Building Envelope, top to bottom, inside and out,” said Richard Doornink, President and Managing Director of Kemper System America, Inc.

Beyond sealants,the company offers a range ofliquid-applied Kemperol reinforced roofing membrane systems, Wall Guardian air barrier products, Roof Guardian elastomer-based roof coatings, and COLEAN  traffic coatings.

KempertecJoint Sealant is a new addition to the Kempertecprimer line of substrate preparation products for use with Kemperol systems. It quickly fills gaps between cover board or plywood joints and around penetrations to ready surfaces for the primer. “The Kempertec Joint Sealant saves applicators from the multi-step process of mixing and applying a primer/sand slurry mix in joints,” said Doornink. “It cures in less than three hours, and is then ready for the next step of full Kempertec primer application.”

Three GreatSeal ProductsGo the Distance

• GreatSealPE-150 multi-purpose joint sealantis a versatile, high-performance product that forms long-lasting weathertight seals. The indoor/outdoor sealant can be applied in cold weather and adheres even on damp surfaces. It is ideal for sealing joints in roofing, walls and masonry, as well as for closing gaps around penetrations, flashings, windows and doors. Based on a next-generation polyether sealant, the single-componentGreatSeal PE-150 contains no solvents and very low VOCs. It exhibits excellent weathering properties with a service range of 200^oF to minus 40^oF (93^oC to minus 40^oC), movement capability of +/- 25%, and zero shrinkage;
• GreatSealLF-500 Liquid Flashing is ideal for rooftop flashing, maintenance and repair applications. The high-performance high-build polyether sealant can be applied via brush, trowel or gun. The single-component polymer can bond even on damp surfaces and to such roof materials as metal, wood, masonry, plastic, fiberglass, glass, and foam insulation. It also has excellent weathering properties, with a service temperature from minus 40^oF to 200^oF to (minus 40^oC to 93^oC) for a long-lasting seal;
• GreatSealLT-100 Liquid Tape is compatible with Wall Guardian FW 100Aliquid-applied fibered acrylic air barrier and a key component of the ASTM 2357-compliantWall Guardian Air Barrier system. The liquid tape seals the lineal, board-to-board joints of gypsum sheathing, EPS, fiberboard and plywood while remaining flexible to move with the building. It can be used to seal other wall penetrations under ¼ in. The 100 percent solids and solvent-free polyether formulation forms a seamless, monolithic exterior working surface. Its distinctive blue color allows for quick visual verification that all seams and gaps are effectively sealed. It skins in one hour, moisture-cures completely in three to seven days depending on conditions, and is paintable within 24 hours.