This paper presents flexural strength, flexural modulus as well as the weight percentage of porosity in specimen by mixing two kind of epoxy resins for Sikadur® 31 CF Normal and Sikadur® 52 TH. The ratio of mixed Sikadur 31-52 following by 100%-0%, 66%-33%, 50%-50%, 33%-66% and 0%-100%, respectively with 3, 6, and 9 days curing time. The aim of this project helps to choose the correct proportions for renovating archeological structures, and especially in the reuniting process of broken statues. Epoxy curing specimen in each rate for short periods as long as 3 days curing, demonstrated a large scatter especially for the mixture. This can be viewed as a sign that the curing procedure is not yet progressing right and a longer time span like 9 days curing must be considered for a practically full curing. Furthermore, the experiment was shown that the specimen which has a higher amount of Sikadur® 31 in mixing exhibited an increased the strength and stiffness. The highest strength can be acquired with the 66% of Sikadur® 31 and 33% of Sikadur® 52. With this mixture, it was shown 27% higher strength than pure 31 and 17% than pure 52 in 9 days curing time. Another thing that could be noticeable from fracture surface is that pure Sikadur® 31 specimen has more porosity if compared to others. This is similar to the experimental investigation.