... ,4hNo crackle-40°C,4hNo crackle4Rate of change of dimension under heat ageing(80±2) °C,24h,≤1.5%(80±2 ... penetration0.5Kg, (23±1) °CNo water penetration9Speed-up ageing treatment under artificial weatherRadiation energy:2,000MJ/square meterRadiation energy:10,000MJ ...