What is Tack Coat?

Tack coat is glue for asphalt layers to promote bonding between old and new asphalt. Due to oxidation, wear and contaminates, a material is needed to ensure a durable connection between the two layers. So, a liquid asphalt emulsion acts as a glue when applied to the old asphalt. Since the material we sell is rapid set in short order, it will set and can be paved over. Without this step, one layer would just lay next to or on top of the existing pavement. With out the bonding agent traffic and water infiltration caues the pavement to pull apart and the asphalt starts to break down.

This tack coat can create a strong adhesive bond between pavement layers without slippage. The amount of material applied is not a thick application. The tack coat we supply is not meant to be diluted. It meets specifications for correct bonding of asphalt layers. It is especially important not do dilute the material were applications of tack coat are used on or under porous layers of asphalt pavement. A second situation that is very important that the material not be diluted around patches where the tack coat also functions as a seal coat. The correct abililty to bond is dependent on enough bonding agent to hold the two parts together.

What is Tack Coat Made Of?

It is an asphalt emulsion. The trick is to take the very sticky, thick, bituminous asphalt and grind the particles very finely. This is done in what is called a colloidal mill. These small asphalt droplets are held apart by adding an emulsifier and water. So the effect is asphalt will help with suspension and is kept as a liquid so it can be sprayed on. The water dries out and leaves the asphalt binder behind. To see more about how tack coat is made we have information on that here.

We have an online quote form available for you to request any amount of tack you may need or please call us  (781) 254-2773