Root canal wall density is a success factor in root canal treatment. The success of root canal treatment is affected by the obturation and siler materials used. In general, this study aims to determine the effect of root canal density between glass ionomer and epoxy resin with CHX 2% for irrigation. The type of this study was clinic laboratory. The research samples used is premolar post-extraction teeth. The samples were didived into four group with four samples each. Group A used siler SIK and CHX 2%, group B SIK and aquades, group C AH plus and CHX 2% and group D used AH plus and aquades. The sample was seen for density of the root canal wall using a stereo miscroscope. The result was analyzed by Kruskall wallis test and Post hoc Mann-whitney u test and Independent T-test The results of color penetration obtained siler made from SIK + irrigation solution CHX 2% has an average of 2,339mm, SIK + Aquades have a flat - 1.061mm, AH Plus + CHX 2% has an average of 0.275 mm and AH Plus + Aquades has an average of 0.297 mm. Result of non-parametric statistic test Kruskal Wallis known value p = 0,000 p <0,05 (p = 0,000 <0,05) 0,000. The significance number has a value less than the critical limit (Asymp.Sig <0.05). The conclusion is there are differences in the density of the root canal walls using SIK type I and AH Plus as Siler based epoxy resin with or without irrigation CHX 2%.