GFS Grain Silo Company: What to Check Before You Shortlist One A grain silo looks like a simple container for a dry product, which is why grain storage is frequently bought on price per tonne of capacity. The losses that follow are rarely dramatic - no leaks, no visible failure - but they are continuous and they accumulate. Grain that heats in one pocket of a silo, bridges over the outlet, or goes out of specification on moisture is grain that has already been paid for and