Expansion Joints create space between concrete slabs as a buffer for expansion when it's hot and contraction when it's cold. Expansion joints are usually installed during the initial installation of the concrete, but can also be added afterward as well.  These joints vary in size. A concrete slab without expansion joints will crack, therefore reducing the life of the concrete slab. If the joints crack to the bottom of the concrete and come open, water can run under the bed of the slab, eroding it and creating voids that can heave and cause even larger cracks and concrete issues. Weed growth and insect penetration can also cause joints to deteriorate and open.

Control Joints allow some cracking in a controlled area as the slab settles with time. Usually, these joints are cut into the slab after the concrete hardens. Control  Joints vary in size and slabs without these joints will crack in random patterns, ruining the look of the concrete and increasing the chance of water damage.

• Reduces cracking
• Reduces ground shifting
• Prevents water from running underneath the concrete and creating voids
• Eliminates the accumulation of dirt, salt, and other foreign materials
• Prevents weed and grass growth
• Prevents breakage
• Humidity Retention
• Bonds to concrete for long-service life
• Easier to clean
• Improves the appearance of the property

We carry two types of expansion joint self-leveling caulking.

One is a two-part polyurethane manufactured by Sikaflex that comes in many colors, with a life expectancy of seven to ten years, and is the number one choice among homeowners. The other is a Silicone rubber manufactured by Dow Corning. This product is only available in dark grey and has a life expectancy of up to twenty years. The Dow Corning's Silicone Self-Leveling product is a premium product and costs almost double that of the Sikaflex Polyurethane. This product is mostly used in commercial applications such as parking lots, highways, roads, and warehouse floors.

Expansion joints need to be sealed periodically to protect against water, dirt, and debris. These elements can hurt the structural integrity of concrete over time. Water can also lead to mold and interior leaks that are costly to repair.

One of the best uses for silicone caulk involves filling the gaps between concrete and other materials, such as brick, wood or metal. Silicone caulk adheres well to all of these materials, and because it has elasticity, it won't crack or break when materials like wood expand in response to environmental conditions.

Typically, a polyurethane sealant will produce effects that last between 5 and 10 years. While a silicone joint could last more than 20 years. Most professionals however would argue that the quality and harder nature of Polyurethane sealants slightly edge out the longer lasting nature of Silicone.