This document investigates the effect of PEG 400 self-curing compound on the compressive strength of different grades of self-consolidating concrete (SCC) mixes. Nan-Su mix design was used to design SCC mixes with grades from M20 to M40. Workability tests found the slump flow and J-Ring tests met EFNARC guidelines, while V-Funnel and L-Box did not. Compressive strength testing showed M25 and M30 mixes exceeded target strengths, and all grades exceeded characteristic strengths. In conclusion, PEG 400 self-curing compound provided adequate curing and improved compressive strengths of SCC mixes.