Upon receipt, store the entire kit at -20°C in a constant-temperature freezer. When stored under these conditions and handled correctly, all kit components will retain full activity for at least six months from the date of receipt, or until the expiry date indicated on the kit. KAPA Express Extract Buffer and enzyme may be stored at 4°C for regular, short-term use (up to one week). Provided that it has been handled carefully and not contaminated, the kit components are not expected to be compromised if left (unintentionally) at room temperature for short periods of time (up to 24 hours). Long-term storage at room temperature or 4°C is not recommended. Please note that reagents stored above -20°C are more prone to degradation when contaminated by the user; storage at such temperatures is therefore at the user’s own risk.