CalpreneВ® 412 Thermoplastic rubber SBS dry CalpreneВ® 412 is a 69/31 Butadiene/Styrene Thermoplastic Copolymer, polymerized in solution and has a radial structure. Presentation C-412     Porous pellet C-412M  Powder form dusted with amorphous silica Main Applications Asphalt Modification (Paving and Roofing) Documents TDS   MSDS   Characteristics Property Unit Value Structure --- Radial Styrene % 31.5  Bookfield Viscosity cps 23 100 TSV cSt 28 Volatile matter % 0.4