Provided are: a propylene-type polymer which can improve heat creep resistance; and a hot-melt adhesive agent having excellent heat creep resistance.

Disclosed is a method for hot flow forming and bending closed, half-open, and open profiled members.

Preferably, the gas permeability of the gasket material is less than 1.0 ml/min and the hot creep of the gasket material is less than 15%.

The specific olefin material used is a blend having an overall melt index (I2) of less than 2.5 g/10 min before crosslinking with a density in the range of 0.865 to 0.885 g/cm3.

The resin has a melt flow rate (in accordance with ASTM D-1238-70; temperature, 315.5°C; load, 5,000 g) of 100-500 g/10 min, excluding 100 g/10 min.

In particular, the reactor grade propylene based elastomers or plastomers contains from 3 to 15 percent by weight of units derived from an ethylene and a melt flow rate of from 2 to 200 grams/ 10 minutes.