双层复合密封衬垫是一层含有蛭石成分的膨胀衬垫与另一层不含有蛭石成分的非膨胀衬垫复合而成的密封衬垫。极佳的耐久性Excellent durability、  优异的密封性Excellent air-tightness、 极好的隔热性Excellent heat insulation、 高弹性High elasticity、在低温和载体再生时都有很好的固定力Good at fixation when low temperature and substrate regeneration.适用于薄壁或极薄壁载体的催化器Catalytic converters thin-walled or ultra thin-walled substrates.柴油机的大型载体包裹Catalytic converters with large substrates for diesels.