JB Weld High Temperature Silicone Gasket Maker and Sealant, Red, 85 g

In mycology, you can drill the jar lid and used this silicone to create an injection port that self heals. Autoclavable.

• Great for culture/spawn jars, oil pans, valve covers, exhaust manifolds, water pumps and timing covers
• Autoclavable and withstand heat to 280°C
• Use on metal, automotive, and more
• Designed for use in household or mechanical assembly applications
• It will not shrink or crack, resists weathering, is sensor safe