SV 121 yog ib qho khoom sib khi ua ke raws li silane-hloov polyether resin ua cov khoom tseem ceeb, thiab yog cov khoom tsis muaj ntxhiab, hnyav-dawb, isocyanate-dawb, thiab tsis muaj PVC.Nws muaj cov viscosity zoo rau ntau yam khoom, Thiab tsis muaj primer xav tau, uas kuj tsim nyog rau cov xim pleev xim.Cov khoom no tau raug pov thawj tias muaj kev tiv thaiv ultraviolet zoo heev, yog li nws tuaj yeem siv tsis tsuas yog sab hauv tsev tab sis kuj sab nraum zoov.