However, as the verse above states, there came blood AND water. Cells separate after death and thus the appearance of blood AND water, rather than just blood. While Lazarus was able to rise and walk, he was not able to come out of his burial clothes without the aid of others. See John 11.44 where Jesus instructs the people to unbind him. The burial customs of that day included coating 1 inch strips of linen with Myrrh and Aloe, and then wrapping each part of the deceased's body except for the head.
Myrrh is similar to shellac in that it dries hard.
The linen grave clothes would have been hard. Jesus miraculously broke through the grave clothes without disturbing them. See John 20.1-10 for the eyewitness accounts of the empty tomb and the grave cloths. This would be equivalent to the Roman Maximum Security - One centurion with 16 soldiers for each 12 hour shift. The guards would protect the seal with their life, because if Pilate's seal was broken it would mean death for the soldiers guarding it.