The EU Emission Guidelines recommend limits for five hazardous substances in indoor building materials. Based on the EU Lowest Concentrations of Interests (EU-LCI) guidelines, the emission limits for five types of chemical substances present in indoor building materials are announced. The five chemical substances regulated are as follows: – 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate (2,2,4-trimethyl-1,3-pentanediol monoisobutyrate), limit value 0.3 mg/m3; – 2,2,4-trimethyl-1,3-pentanediol diisobutyrate (2,2,4-trimethyl-1,3-pentanediol diisobutyrate), limit value 1.3 mg/m3; – 2-methyl 2-methyl-1-propanol, with a limit of 11 mg/m3; – 2-phenoxyethanol, with a limit of 1.3 mg/m3; and – isopropylbenzene ), limit value 1.5 mg/m3. The above-mentioned LCI values were proposed by the German Environmental Protection Agency (UBA) and are hoped to be integrated into the EU-LCI by the end of 2019.