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Techgard High Solids Epoxy Blockfiller is a high performance, high solids, two component, interior/exterior epoxy filler formulated for excellent adhesion while filling voids and resurfacing concrete in industrial exposures. Must be used with part B Activator, S4251. It provides excellent resistance to moisture, humidity, impact and humidity. Designed as filler/sealer under high performance coatings. Techgard High Solids Epoxy Blockfiller meets the requirements of USDA.