Advantages: 1, the price is reasonable, affordable 2, instant foam, expansion of multiples, filled with small dosage, antistatic, flame spread, this product is suitable for extinguishing, good resistance to stress, can adapt to the rock movement by the bicomponent materials (resins, catalysts), mixing appropriate proportions, the rapid accumulation of foam molding, flowing, high expansion ratio, the lower the reaction temperature, the non-volatile release of irritating gases, the cured product having a larger toughness and deformation capability, not brittle and cracking, excellent sealing performance. Scope: permanently sealed goaf fire harmful gases underground rapid intercept blocking rock joint, to prevent air seepage to build a closed wall and firewall technology data component resin catalyst density (25 ° C) g/cm3 1.23 1. the storage temperature of the mixing ratio (by volume) 1 1 ℃ 5 ~ 25 5 ~ 30 storage period (months) 4 12 expansion in multiples of 20 to 30 reaction time (s) about 60 to about 120, the flame-retardant properties of flame-retardant