Mechanical Properties—A Comparison of Commercial Sealant Properties

Tensile properties were measured using an appropriate tensile test machine with dumbbell No. 3 specimens at a pull speed of 200 mm/min in accordance with JIS К 6251 Tensile testing methods for vulcanized rubber. Although conventional water-borne acrylic sealants are widely known, and are often used for such benefits as workability and cost effectiveness as construction sealants, there are many usage limitations due to their drawbacks, including relatively large shrinkage, no cross linkage, low elongation, and poor adhesion properties to metals and plastics. On the other hand, NTP sealants have high flexibility, low modulus, and high elongation, as seen in high-performance sealants such as silicone sealants. See Table 1.