Sikaflex 428 Precast is a one‑component, moisture‑curing elastic polyurethane sealant intended for movement and connection joints in concrete precast elements, as well as GRC, GRP, masonry, concrete block and roof joints. It can be applied both indoors and outdoors and is formulated to perform in hot and tropical climatic conditions. The sealant provides flexible, durable sealing without releasing CO₂ bubbles during cure.
