GCP Adcor Mastic is an essential ancillary within the Adcor hydro-expansive waterstop system, addressing one of the most common on-site challenges irregular or uneven concrete joint faces. By gunning a 10mm bead of Adcor Mastic as a bedding layer, a consistent and fully supported base is created for the Adcor 500S or 500T strip, ensuring reliable contact and performance across the full length of the joint. Where access or geometry makes installation of Adcor waterstop strip impractical — such as complex corners or tight penetration details, Adcor Mastic can be applied as a standalone hydrophilic sealant to maintain waterstop continuity. Benefits Swells on contact with water No special applicator required, as a normal sealant gun can be used can be used to repair damaged sections of Adcor waterstop strip Good to know Ideal for bedding bead on irregular concrete surfaces prior to Adcor 500S or 500T installation Can be used as a standalone hydrophilic sealant at complex details and penetrations Ideal gap filler at corners and changes in geometry within the Adcor waterstop system
