Slush" is that hard to describe material you get wnen you mix ice or snow with water to form a semi-frozen mess. It is usually tinted by the soil or other dirt below it and from the wheels or tracks of vehicles moving through it. Although this description may not sound too glamourous, when modeled properly it can add a wonderful effect to any diorama. Imagine your model splashing through a puddle full of dirty slush with chunks of ice floating and bobbing while frozen miniature infantry look longingly at the beautiful vehicle you've modeled.
"Slush" is compatable with all the commonly used clear casting resins used to make water, so try adding some slush around the edges of your nearly frozen puddles amd/or ditches. It has lots of uses so make sure to keep some on hand at all times in case you need it to model "Slush" late at night after the hobby shops are closed. With lots of Hudson & Allen "Slush" stored away, you'll rest easier knowing that you have your very own "Slush Fund".