Concrete garden art accents your landscaping with designs that express your style, but those concrete statues need care just like your plants. Over time, weather elements wear away at the concrete, especially if it isn't sealed. Extreme temperatures also affect the integrity of the concrete. Cold winter temperatures in particular can cause cracking in concrete art. Preserving concrete statues doesn't require a lot of effort, but the payoff comes in a piece that stands up over the years.