1. Bonnets provide leakproof closure for the valve body. 2. A " leakproof steel thin membrane " lines the internal wall of the vessel. 3. The balloon's capsule could float for a while, but it was not leakproof . 4. The balloon's capsule could float for a while, but it is not leakproof . 5. The lengthy dispute centers around P & G's so-called leakproof diapers. 6. I remind him, " you had on two diapers and leakproof pants under there ." 7. They said the balloon's capsule could float for a while, but it was not leakproof . 8. The nation needs comprehensive federal legal rules both to protect individuals and to encourage leakproof communication of health data. 9. Along with that came Lowe's undisclosed recipe for a varnish that would render the balloon envelopes leakproof . 10. Place uncooked meats, poultry and fish in leakproof containers or store them on the bottom shelf of the refrigerator.