Fish or meat grilling boards-Kosher certified?

 Pure grilling planks (cedar, alder, maple). Reputable brands market these as untreated with chemicals or additives. 

Reputable grilling plank companies use only vegetable-based lubricants in their mill facilities, and kiln dry the wood to 130°F to kill fungus, bacteria and insects. 

 On paper these sound clean — but "vegetable-based lubricants" is doing a lot of work in that sentence and tells you nothing about the source of those lubricants.