The wood preservation had already conquered big tasks in the early 19th century. The knowledge of the value of the heritage, helped in developing early preservation techniques. Besides the effort in wood preservation, there were early trials to stabilize worm infested wood. A systematic research was only seen towards the end of the 19th century, early 20th century. A research area for worm infested wood was established in 1902 in Dresden. Research and findings from that time were unfortunately lost over time. In practice one can find a variety of material used. Soaking in glue, hot linseed oil baths, wax-resin mixtures, acetate, nitrocellulose, acrylic resins, epoxy resins, monomers and polymers were some of the approaches used. Despite affirmed success, all approaches remained problematic for the pieces of art, proven by longtime effects. No substance proofed to comply with very high standards in the wood preservation. There has not been any notable success for close to 30 years and restorers are forced to use mainly acrylic resin. It is the goal to develop a substance for wood consolidation, which complies with the wood matrix more accurately. The anisotropy of the wood remains to be problematic. Change in climate and aging lead to new damage. Consolidation after extraction of prior damaging treatment is still only at its beginning.