This study investigated improving bamboo–concrete bond by increasing mechanical interlock. Pull-out tests were used to measure the bond between bamboo and concrete. Corrugated and non-corrugated bamboo splints were tested, with four different patterns of corrugation. The effectiveness of using linseed oil for waterproofing corrugated and non-corrugated bamboo splints was also investigated. The bond stress and slip at the loaded and free ends were measured and recorded. The results show that the bamboo–concrete bond can be improved with the use of waterproofed corrugated bamboo splints. The bond achieved using waterproofed corrugated bamboo splints was comparable to the bond achieved using splints treated with expensive epoxy treatments. Although certain patterns were found to be more effective in achieving a strong bond with concrete, all the corrugation patterns with 2 mm projections achieved better results in comparison with non-corrugated splints. Linseed oil was found to be effecti