Approved products Homologation of a product To achieve its objectives, BAWP grants homologation to a wood preservative product on the basis of a technical dossier submitted by the producer or his representative. Procedure for homologation The procedure that allows a wood preservation product to enter the market with a technical approval (ATG) consists of three successive steps. How to apply for a homologation There are two documents that explain the procedure to apply for the homologation of a product.