Specifications:

Sikaflex-221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength.
Chemical Composition:        Polyurethane
Color:        Black
Components:        1 part
Elongation:        500% @ break
Hardness:        40 A
Service Temperature:        -40 to 90 °C
Specific Gravity:        1.27
Tack Free Time:        60min
Tensile Strength:        260 psi
Working Time:        45min