Abstract: The present invention is directed to a moldable biomaterial comprising a particulate solid porous material and a biodegradable paste material. The paste material and the particulate solid porous material form a matrix usable for the replacement or augmentation of bone. In various embodiments the matrix has a high structural integrity, which does not immediately or shortly after implantation collapse into an amorphous non-porous mass, maintains its porosity after implantation, shows biphasic degradation after implantation and/or has a good resistance against being washed out when it is applied to a wet opened implant site. Active agents can be incorporated in the moldable biomaterial of the present invention, such as bone growth factors. Kits, implants, method of manufacturing as well as medicinal uses are also provided.