Eucalyptus wood is a popular choice for outdoor seating due to its durability and natural resistance to pests. However, warping can occur if the wood isn't properly maintained. Here are the most effective ways to prevent warping in eucalyptus outdoor seating:

1. Seal the Wood Regularly: Apply a high-quality wood sealant or oil to protect the eucalyptus from moisture absorption, which is a primary cause of warping. Reapply every 6-12 months.

2. Store Properly During Off-Seasons: If possible, store eucalyptus furniture indoors or under a cover during extreme weather conditions to minimize exposure to rain and humidity.

3. Use Proper Supports: Ensure the furniture is placed on a level surface and avoid uneven weight distribution, which can lead to warping over time.

4. Avoid Direct Sunlight Prolonged Exposure: While eucalyptus is hardy, excessive sunlight can dry out the wood unevenly, increasing the risk of warping. Use shade covers when not in use.

5. Clean and Maintain Regularly: Remove dirt and debris with a mild soap solution and a soft brush. This prevents moisture retention and fungal growth, which can weaken the wood.

By following these steps, you can extend the lifespan of your eucalyptus outdoor seating and keep it looking pristine for years.