An expert focused on letters that were not properly sealed.

The corn had not been sealed properly and all of it spoiled.

One of the bottles, which she had failed to seal properly, spilled.

A nurse put an oxygen mask on him but it wouldn't seal properly.

How can I restore them and then properly seal them?

A wooden hull can be used for operating models if properly sealed.

The temperature's probably pretty constant down here, so wine could have aged rather well, if it was properly sealed.

It cost him two minutes to put on the heavy suit and properly seal it.

Second, one has to make sure that the food containers are properly sealed and the food is kept fresh.