Aardvark Packers are specified on many pressure grouting jobs to provide a superior seal against grout bleed. They are required for stage grouting and up-hole grouting from tunnels and galleries. Tigre Tierra Inflatable Grouting Packers are designed to deliver unmatched performance on the toughest pressure grouting jobs. No mechanical packer or homemade plug comes close. Steel cable reinforced glands. Our glands retain run-in diameter and hold dimensional stability throughout their service life.