SPECIALTY CHEMICALS

Guide to Polyureas

See Polyurea Joint Fillers and Concrete Repair for information on individual products

Dayton Superior Polyureas are two component self leveling, rapid set elastomeric joint sealants/fillers. Polyureas can be used inside or outside in a wide range of temperatures. Dayton Superior Polyureas are available in a range of elongation and shore hardness depending upon project requirements.

The benefits of Polyurea Joint Fillers include:

The benefits of a Polyurea Repair Material include:

Polyurea Joint Sealant/Filler

Cleaning is the most important part of any quality installation. Joint walls should be clean and free of all dust, dirt, sealing and curing compounds. Make sure that the joints are dry and free of any moisture. Moisture in the joint may cause the material to bubble.

Proper cleaning of joints requires mechanical cleaning with dry diamond blades, and then blown with dry compressed air (the air compressor should deliver around 120 cfm) or vacuum out the joints.

Do not wash the joints with water. This will only delay the start time of installation of the polyurea. Do not wash joints with any chemical solvents or other chemicals that will trap contaminates in the concrete.

Polyurea must be installed by mechanical action (Pump or Cartridges) to insure proper mixing. Do not hand mix. When using a pump, make sure the pump is delivering the components at a ratio of 1:1. If the ratio is off 5% to 10% the performance of the product may drop substantially or may never set up at all. Improper ratios and mixing can cause:

It is recommended to mix both A & B side separately prior to installation.

Polymer Repair Material

Dayton Superior CM 2000 is a high-tech polymer concrete repair material that can withstand traffic within 20 minutes @ 70°F (21 °C). CM 2000 is a two component rapid curing concrete repair material that can be used in a wide range of temperatures from 200°F (93°C) down to -40°F (-40°C).

When mixed with quartz sand it becomes a tough 4500 psi polymer concrete that adheres tenaciously and withstands abrasion. CM 2000 is available in bulk or in convenient cartridges.

Surface preparations are the most important part of any quality repair; the repair area should be clean and free of all dust, dirt, sealing and curing compounds. Make sure that the area to be repaired is dry and free of any moisture. Moisture in the repair area may cause the material to bubble.

CM 2000 can be used to repair hairline cracks, spalls and almost any concrete repair.

When repairing hairline cracks use CM 2000 in cartridges (neat). The low viscosity material will flow down into the crack to make a fast, long lasting repair. On larger cracks from ¼" to ½" also use CM 2000 in cartridges. First fill cracks with silica sand and strike off flush (any fine sand will do as long as it is cleaned and screened). Then use CM 2000 to saturate sand until flooded with material, followed by broadcasting additional sand then striking off flush with the surrounding surface.

On larger repair projects we recommend using CM 2000 in bulk. Use one part CM 2000 (A&B mixed) mixed with two parts silica sand to make a repair mortar. Trowel into the repair area and let set for 20 minutes, longer in cold temperatures, before opening to traffic.