Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to seal travertine [title] Test whether sealing is necessary. [step] Polished travertine often doesn't need sealing, but you don't need to guess whether or not it's a good idea. It's easy to test whether sealing is required by dropping a few drops of water in a few inconspicuous areas.

Ending1: Once you've accepted a stain, you can go ahead and seal the entire stone floor. [substeps] A drop of water won't begin to remove stains unless the stone floor becomes saturated. Ending2: Let the water stand five to ten minutes, then blot dry. If the travertine stays darker in color for more than a few minutes, sealing is probably a good idea to protect it from other liquids that could leave a permanent stain. Ending3: If you notice one drop washing into a remaining area, it's probably safe to keep your travertine clean. [substeps] If you see a drop or two traveling to another area, it's safe to leave your travertine clean. Ending4: [title] Dry travertine with a drop of liquid topcoat or a touch of water. [step] Once the travertine has dried, dry it with a drop of liquid topcoat so it shines, not drips.

Answer format: ending1/ending2/ending3/ending4