Every interlocking brick paver system involves the use of joint sand. This joint sand helps to reduce paver movement by bonding the system together. It is also a vital part of prohibiting weed growth, insect infestation, and sand washout. The proper type of sand needs to be used for the best results. Polymeric sand is highly recommended because once it is applied to the joints, it reacts with misted water and creates a binding agent that helps solidify the sand and locks the pavers together.
The best polymeric sand to use is a brand like Surebond. This special polymeric sand will bind the sand particles together when reacted with water but will not cause a problem known as poly haze. Poly haze is what happens when there is polymeric sand left on the surface of the pavers after the sand has been swept into the cracks. The pavers are then misted with water to activate the binding agent but in turn it also reacts with the left behind layer of surface sand creating a white haze.
What is Poly Sand Haze and How to Fix?
To understand what poly sand haze is, let’s first take a look at how pavers are installed. Most pavers, regardless if it is a driveway, sidewalk, patio, or pool deck area, are laid on a compacted bed of sand. The bricks are laid out in whatever pattern you desire and are leveled to create an entire paver structure. Sand is then poured onto the paver surface and swept into the gaps between the pavers. This is typically fine polymeric sand especially designed for paver construction.
The polymeric sand joints are then misted with water. The water reacts with the poly sand and creates a binding agent that helps bind the sand particles together. However, before water is misted onto the surface, the poly sand dust left over on the surface must be completely removed. If the poly sand dust is not removed, it will create a white haze on top of the pavers. This is called poly sand haze.