Silica gel can be reactivated by removing the absorbed moisture using heat.
Microwave
: Place silica gel beads in a microwave-safe container. Use the defrost setting for 7–12 minutes, checking frequently to avoid overheating. Do not use high heat.
Oven
: Spread the beads in a shallow tray and bake at 200–250°F (up to 120°C) for 30 minutes to 2 hours. Do not exceed 125°C.
Colour Check:
Gel is fully reactivated when it returns to its original colour (e.g. deep blue for indicating gels).
Note
: Reactivation can be repeated several times, but performance may decline due to contamination or overheating.
