Hi, I'm about to build new raised vegie beds and will use the sienna treated pine sleepers. Some will need cutting, and it says in the Bunnings listing that cuts should be sealed with CN oil. Can you suggest some products that are safe to use when growing food please?
Welcome to the Bunnings Workshop community @jjwill. It's wonderful to have you join us, and many thanks for your question about re-sealing treated Pine.
We stock Tanalised Enseal Timber Treatment which is a Zinc-based treatment. I'll need to enquire with the manufacturer after the weekend to ensure this currently stocked product is suitable for your purposes.
Many thanks for your patience.
You can use Gripset Betta Bitumen Rubber for anything going into the ground. This is a black-coloured product, so for any exposed edges, you might wish to use the Tanalised Enseal Timber Treatment, which is clear. I've spoken to the manufacturer of this product, and they've advised that it is entirely safe to use. However, it is a chemical product, and if you have any concerns, you can line your garden bed with Builder's Plastic. Just make sure to add several holes at the base for water drainage.
Please let me know if you have any questions.