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Joint sealing prevents unwanted surface water and contaminates like spent fuel or oil entering into the concrete or asphalt structure via the expansion or contraction joints.

These joints allow the concrete to expand and contract in variant temperatures, without them the concrete or asphalt would crack as a consequence. The sealant will move with the concrete or asphalt whilst providing a constant seal against the elements and any unwanted surface spillages.

The joint sealant material can be applied hot or cold via a melting pot or a metered mixing machine depending on what material is being applied to suit the specification of the joint. Joints can be formed during the construction process or cut afterwards using a diamond saw cutting technique, the latter is often used to widen old joints where the material has dilapidated and new sealant material is required to refurbish the joint.

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