SX Painters Caulk-It filler is a premium grade white caulk filler and sealant. Caulk-It filler is a water based flexible filler and is suitable for sealing and filling gaps and cracks where slight movement can occur, such as those between plaster-work, window and door frames, skirting boards and architraves. SX Caulk-It is easy to apply and dries quickly and can be over-painted after only 1-2 hours. For use prior to painting or wall papering to fill cracks to leave a professional smooth finish. Suitable also as an acoustic sealant. Medium 3100ml size cartridge, conforms to ISO11600 F7, 5P.