Like others said - Sellier & Bellot has the red lacquer sealed primers, but it doesn't seal the bullet/case area.
You can hand seal this area with a coating of wax and polish 'em off to ensure proper feeding/function. Another option would be to use a zip lock bag like someone else had mentioned.
"With great power, there must also come great responsibility." - Stan Lee
"All that is necessary for evil to triumph is for good men to do nothing." - Edmund Burke