Here is the same sealant we provide with many of our cylinder tube time capsules in the Future Line family & school time capsules. The basic version of the sealant comes with applicator and tube in the original cardboard pack. You can opt to get the sealant kit that is the same that we provide for our time capsules, or just opt for the instructions if you need them for time capsule application and hints.
We don't include it with our baby time capsules, so you can now add it to your order should you wish to bury the time capsule. Adding the sealant to your time capsule will extend the safe life of burial, and we recommend it. The kit, available as an option, includes all of the following: