QUESTION: We have a lab freezer that goes down to -32°C, and the seals are torn and need replaced. What do you recommend?
ANSWER:Exposure to low temperature affects most elastomeric materials, resulting in decreased compression and possible leakage. Extreme cold also affects seals by making them less flexible and more brittle. You will find, however, that most silicones will still give some flexibility at the low temperature of your freezer.
Although silicone manufacturers do offer special low-temperature grades, I would be surprised if a window and door sealant grade will not work for you. You should certainly make sure that the silicone is fully cured at room temperature before exposing it to the low temperature.
QUESTION:Can I use a threadlocking adhesive for assembling screws into plastics?