B product of polyurethane foam is a kind of private engineering product, it has instant foaming rate 70%-80%, post up small, shrinkage is less than 5%, the obturator rate is more than 70%,good waterproof performance; it has various performance according to the demand of the market launch of the moderate foam sealant, often used in all kinds of engineering,the daily repair, the installation of doors and windows. Engineering general styrofoam advantages: 1, foaming, instant foaming rate 70%~80% (it can save 30% overflow cutting costs compared to the after foaming products); 2, post up small, shrinkage is less than 5% 3, obturator high rate reaches above 70%, waterproof thermal insulation; 4, installation is convenient, manpower cost is saved; 5, two types,tubular, spray type can meet your different needs; 6, insect prevention, mildew etc.. Application of temperature: normal temperature tank +5 ~ +35 degrees the optimum temperature of +18 ~ +25 degrees humidity: normal humidity is above 45 degrees The best use of humidity is above 60 degrees Note: because of one component polyurethane foam is moisture curing, when air humidity is below 45 degrees, the construction surface should be dealt with spray treatment or it will be burned and empty large bubble will appear.