While tradition traffic surface repair would call for a complete demolition of both the existing traffic topping and the membrane under it, we are able to fully repair and waterproof the area with a single application.
Benefits of Polyurea and Urethane Applications
Polyurea and urethane can function as both waterproofing membranes and traffic topping, which makes it possible to apply them over the existing surface, whether it’s asphalt or mastic, without the need to demolish the old traffic topping or the membrane underneath. This saves time and money. Besides, large parking garages and parking decks can be repaired in sections, allowing for a continuous flow of traffic.
These applications cure fast, making it possible to reopen the repaired area to traffic within 24-48 hours (unless a polyurethane topcoat is chosen by the client, in which case it takes up to 72 hours for the surface to be fully cured and ready to be reopened).
A variety of different colours is available – our customers can choose from our urethane, polyurethane, and polyaspartic topcoats, for a fully renovated look. The specialised aggregates broadcast as part of the topcoat application ensure a non-slip, easy-to-maintain surface.
Asphalt Traffic Topping To ensure proper membrane installation, the surface is first power washed, cracks are filled, and loose asphalt is removed. An epoxy-based primer is applied next, providing a water barrier, and aggregates are broadcast for a more lasting bond between the basecoat and the topcoat. A polyurea-based membrane is then applied, and coated with a polyurethane or a polyaspartic topcoat which is broadcast with aluminum oxide.
Mastic Traffic Topping First, we test the existing traffic topping to determine whether it has enough adhesion to the surface underneath – in which case we are able to repair it by following the same procedure as for asphalt traffic toppings.
Concrete Repairs Polyurea- or urethane- based membranes can be installed over new or repaired concrete. If it’s a new surface, enough time must be given for the concrete to fully settle and contain less than 4% moisture (this usually takes up to 28 days). The newly built surface might require profiling for proper adhesion.
If repairs are required, they are done ahead of the membrane installation – with specialised industrial-strength materials, we are able to do extensive crack repair and patching (even as thin as 5 mm).
Once the basecoat is applied, it is coated with a polyaspartic or a polyurethane topcoat. For the floors not exposed to direct sunlight, the aromatic (non-UV protection) coating works well, while the aliphatic (UV-protection) type is required for exterior parking decks, garage ramps and entrances.
Learn more about the benefits of polyurea by checking our page: https://www.jointsealwaterproofing.com/polyurea-membranes