While you're right that you still have to search hard among conventional wood sealers to find a clear finishthat's a healthy alternative, that is changing.
There's no need to subject yourself and others to toxic chemicals, or to poison your plants as they begin to grow.
- Eco Safety Products offers a series of LEED-compatible nontoxic, low-odor, low- to zero-VOC sealers, made mostly from soy.
- AFM Naturals offers other products; and
- SoyCleanhas waterproof wood sealers too.
Reviews often point out that these products are not as durable and long-lasting as traditional sealers, and that they are hard to apply and costly, but with only planter boxes to cover, rather than a deck or fence, any of these products should serve you well.
For more information:
Read our backgrounder "Selecting Healthy and Environmentally Sound Clear Wood Finishes" for detailed advice and comparisons of clear finishes.