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Description Webercem bondcoat is a single-component polmer-modified, cementitious bonding aid. It requires only the addition of clean water to produce a bonding slurry for webercem R4 duo, webercem HB30, webercem HB40 and webercem lightweight mortars. This product has been formulated to comply with the requirements of BS EN 1504-3 for a bonding primer. Key Features High initial grab to improve the build of the repair mortar and promote the bond to the concrete This product has been formulated to comply with the requirements of BS EN 1504-3 Contains fibres for improved thixotropy Cementitious, contains no solvents Single-component; simply mix with water