At LAMG, we aim to provide cost-effective sealants capable of sealing expansion joints and cracks in a variety of essential transportation infrastructures, ranging from concrete pavements to bridge decks. Due to the need to maintain and extend the structural service lives of these infrastructures to accommodate the increasing flow of traffic, developing high-performing and long-lasting sealants is now more in demand than ever before. We have designed a smart two-way shape memory polymer-based sealant that is capable of counteracting the thermal movements of the jointed structural elements in commonly-used transportation infrastructures, specifically by contracting upon heating and expanding upon cooling. In addition, this type of sealant has the necessary mechanical properties and durability to survive repeated traffic loads as well as the ambient temperature fluctuations of the outdoor environment. Even more, our sealants not only have beneficial impacts on transportation infrastructures but also have long-term enduring impacts on various other structures such as driveways, parking lots, dams, harbors, buildings, swimming pools, etc.