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The construction sealants made with Risun T series polymer are higher in strength, stronger in adhesion compared with silicon sealants; They are with longer shelf life and better weathering resistance than PU sealants. If you want to produce high quality construction sealants, Risun T series polymer is your best choice.     Mol.wt    Based on 20000 - 25000 MW polyether    End    Trimethoxysilane capped    Polymer Viscosity    30000 - 40000 Mpa.s at 25℃    Catalyst    DBTDL, DOTL or the safer dibutyl tin diketonoate,titanate for tin-free clear sealants    Hardness    Shore A 20 - 30    Tensile Strength    1.0 - 1.5 Mpa.s    Elongation    400 - 600%    Specific Gravity    1.005    CAS No.    216597 - 12 -5
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