   (9) a rubber composition for constructional gasket, which has high glass holding power, is excellent in weathering resistance, creep resistance and colorability, and is stable to temperature change through the whole year; and construction gaskets produced from the rubber composition; and        (10) a rubber composition which is capable of producing polyolefin rolls having excellent heat resistance and elasticity; and rubber rolls produced from rubber composition.        
The present invention is intended to solve such problems associated with the prior art as mentioned above, and it is an object of the invention to provide a crosslinkable rubber composition, which has a high crosslinking rate and excellent productivity, is capable of undergoing hot-air crosslinking such as HAV (hot air vulcanization vessel) or UHF (ultra high frequency electromagnetic wave), and is capable of producing crosslinked rubber molded products having excellent compression set resistance, strength properties, heat resistance, weathering resistance and abrasion resistance. It is another object of the invention to provide automobile weatherstrip, hose, rubber vibration insulator, belt, sealing material, expanded product, covered electric wire, electric wire joint, electric insulating part and household rubber product each of which is formed from the rubber composition.
Further objects of the invention are as follows:
(1) To provide a crosslinkable rubber composition, which has a high crosslinking rate and excellent productivity, is capable of undergoing hot-air crosslinking (e.g., HAV or UHF), and is capable of producing crosslinked rubber molded products having excellent scratch resistance, compression set resistance, adhesion properties and oil resistance after deterioration; and to provide uses thereof (molded products thereof).
(2) To provide a crosslinkable rubber composition excellent in flowability, which has a high crosslinking rate and excellent productivity to produce crosslinked rubber molded products, is capable of undergoi