Laminated glass is obtained by bonding two or more glass layers using a polymeric interlayer. Compared to monolithic glass, laminated glass is beneficial in terms of post-breakage safety, security against breakins, and acoustic insulation, among others. That is why laminated glass is being used for a wide variety of constructive solutions. Polymers such as PVB, ionomers, EVA and TPU are used as interlayer materials in laminated glass. This review aims to describe the most common polymeric interlayers, outline its characterization techniques, and give a general overview about the recyclability of the interlayers. There are two main properties used to characterize the interlayer materials: mechanical properties and resistance to ageing factors. Main mechanical tests found in the literature are summarized, and the properties studied in each of them are listed. Most experimental studies regarding ageing resistance consider mainly three weathering agents: humidity, UV radiation, and temperature.