... synthesized bypolymer, inorganic water-swelling material, rubber and additives.1.Specifications: JPN-150,JPN-220,JPN-3002.Sub-volume ... test (-20°C x 2h)No embrittlementNo embrittlementNo embrittlementFunctions: 1) Absorb water and expand volume; 2) compact the gaps ... property won't lose after long-term repeated expansion.Performance: 1) weather resistant, anti-aging, anti-leaking, erosion-resistant; 2) ...