How Should Silicone Rubber Be Stored After Opening?

Keep Containers Airtight and Clean

After opening your silicone rubber, always reseal the containers tightly. Air exposure invites moisture and dust, which can spoil the mix or affect curing performance. Make sure the rim and lid are clean before sealing. If available, transfer any remaining silicone to smaller, airtight containers to minimise air space inside.

Store in a Cool, Dry Place

Silicone rubber components should be kept out of direct sunlight and away from heat sources or damp. A stable, temperate environment—such as a cupboard or storage room—will help maintain product quality. High heat, cold or humidity can shorten shelf life or cause separation in two-part systems like the Liquid Mould Casting Liquid Silicone Rubber.

Practical Steps for Everyday Use

• Label opened containers with the date, so you know how fresh the material is each time you use it.
• Avoid dipping used mixing tools back into the original packaging, as this introduces contaminants. Use a clean scoop for each portion.
• If the silicone comes in two parts, consider storing each component in its own clearly marked container to prevent accidental mixing or cross-contamination.