Solprene® 1205

Solprene® 1205 is a linear random-block styrene-butadiene copolymer having 25% of styrene content, 17.5% present as a polystyrene block.

Solprene 1205 is an excellent modifier for asphalt, formulations of caulks and sealants; it is also an excellent processing aid for most polymers, giving a good resistance to low temperature. Used in extruded goods, soles and heels. It can also be used as modifier for thermoplastic resins and in adhesive formulations.

It is available in bales wrapped in low melting point polyethylene. In case of polymer modification by chemical reaction it can be wrapped in styrene-butadiene film.


  • Excellent low temperature resistance
  • FDA Approved
  • Available BHT/TNPP free
  • Non staining antioxidant system
  • Gel free
  • Clear color

Physical Form: Available in bales


Property Unit Value
Mooney viscosity ML (1+4) @ 100°C 47
Volatile matter % max 0.75
Color (alpha) max 15
Total styrene % 25
Block styrene % 17.5
Toluene viscosity @ 30% cP 4000
Insolubles % max 0.1
Specific gravity 0.93

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