Pre-wetting refers to the
addition of liquid melting agents to salt or salt/abrasive mixes to
improve their melting capabilities at lower temperatures by lowering
their freeze point. Pre-wetting also helps the dry material stick to
the road so there is more melting. Generally, 5-15 gallons of liquid
is added per ton of dry material. Pre-wetting is accomplished through
the use of truck mounted tank/pump systems or by overhead spraying as
the truck is being loaded.