Perma-Patch® is an extremely unique, completely new type of paving material which cannot be compared to standard "cold patch" which sets up by evaporation of the hydrocarbon solvents contained in it. The usual cold patch is more like candy popcorn which holds together temporarily but rapidly disintegrates because of lack of cohesion. Perma-Patch® is composed of specially treated asphalt, special aggregate, and chemicals plus pressure-sensitive plastics. It is not temporary pavement, but a permanent paving. It adheres so strongly that a very slight shallow dip can be leveled by placing a very thin layer on the street surface, and it stays there. Perma-Patch® can be used even in standing water with no adverse effects. No tack coat or any other type of adhesive is required as a bonding agent between the existing pavement and the Perma-Patch® material.
Perma-Patch® has proven very useful to contractors and maintenance personnel to minimize time of repair on high traffic volume roadways and eliminate constant repeat trips necessitated when using standard cold patch and even hot asphalt to make repairs on the same damaged areas. Utility contractors such as T.V. or fiber optic cable installers, location and test pit investigators using conventional or vacuum method technology, as well as sewer, water, and gas repair contractors have found Perma-Patch® to be an extremely useful material to permanently repair their utility cuts. Perma-Patch® has shown its reliability and durability on thousands of highways and bridges throughout the United States and in many foreign
countries over the last twenty years.
Immediately after the repair is made, Perma-Patch® is ready for traffic. Since Perma-Patch® contains pressure-sensitive plastics, the greater the amount of traffic, the faster Perma-Patch® sets up.
There is no need to resurface over the areas which have been repaired using Perma-Patch®, as Perma-Patch® becomes as durable and long lasting as the surrounding paved areas. However, if the need arises to resurface the entire street or paved area which includes the area patched with Perma-Patch®, as soon as the surface of the Perma-Patch® has become hard, any time thereafter, the entire area can be resurfaced.
In repair of potholes and small utility cuts and trenches, Perma-Patch® is superior to hot mix asphalt because Perma-Patch® is a permanent repair material whereas hot mix asphalt is not. In these applications, Perma-Patch® is the choice material over hot mix asphalt for the following reasons:
a) Perma-Patch® remains pliable below the surface indefinitely. Because of this self sealing characteristic it will not crack or separate from the existing pavement. Hot mix asphalt hardens with declines in temperature and when used in small areas, will become brittle and crack under low temperature conditions. This causes the potholes to reoccur when repaired with hot asphalt.
b) On bridges, on streets over subway tunnels, or any other roads which experience vibrations and movement; Perma-Patch® flexes with movement and vibration, but does not crack like asphalt. Perma-Patch® can be used at any temperature, winter or summer. Hot mix asphalt is not even manufactured during winter weather because it crystallizes when used under 35ƒF. Perma-Patch® can be used in wet rainy weather with no adverse effects and it will still remain permanent.
c) When using Perma-Patch®, there is no need for tack coat. It's composition is such that it will strongly adhere to stone, wood, steel, asphalt, and concrete; but at the same time, it does not adhere to rubber tires.
d) The equipment required for placing and compacting Perma-Patch® is minimal, and in many instances, not required. Perma-Patch® can be poured directly from the bag into the pothole and traffic can be used as the compaction device. Occasionally, plate compactors or hand tampers may be required. Hot mix asphalt requires a dump truck, raking and smoothing equipment, and proper compaction equipment.