The cement found in most pre-war and pre-turn of the century homes is a basic mix of sand and lime. Over time this compound begins to deteriorate mainly due to moisture and the freeze/thaw cycle. Repointing brick is a tremendous job and not always necessary for an entire structure or wall. There may be only a few bricks that need repair but the old cement next to the new, will stand out more than Paris Hilton at a truck pull. Tom of The Home Improvement Ninja breaks down the technique used to create old “looking” cement from new.