ABAGARD CR-20

SURFACE PREPARATION

Concrete should be cured for a minimum of 28 days prior to coating. The moisture content of the concrete should be below 4%. All surfaces should be clean, dry and free from curing compounds, release agents, trowelling compounds, surface hardeners, efflorescence, grease, oil, dirt, old coatings and loose or disintegrating concrete. All poured and precast concrete must also blasted, wire brushed or acid etched to remove laitance. Cracks, holes and honeycombs must be repaired prior to application.

The compressive strength of the concrete substrate should be at least 3,500 psi (24 MPa) at 28 days and at least 215 psi (1.5 MPa) in tension at the time of application.

Surface preparation shall not take place in following conditions:

• At temperature below 10 ºC
• When the relative humidity is greater than 80%
• When the surface temperature is less than 3 ºC above the dew point

APPLICATION

Premix each component separately. Empty Component B (Hardener) in the correct mix ratio into Component A (Resin) Mix the combined components for at least 3 minutes using a low speed drill (300–450 rpm), scraping the container bottom and side to assure complete mixing and take care to entrain as little air as possible. There is no induction or waiting time required after mixing before application. Always mix such amount that shall be just sufficient to be used up within 30 minutes.

The exothermic characteristic of epoxy curing reactions may cause rapid temperature rise of mixture, which result low workability of material. To obtain longer workability, the mixed mortar may be divided into portions.

Depending on type of use and application, the material is applied using a plastering or comb trowel in a maximum layer thickness of 3 mm in one work step. The application can carried out in multiple layers.

- In cold temperatures, material temperature should be ~15 ºC prior to mixing; otherwise pot life becomes very short.

- While applying the material, the substrate temperature shall maintain between 10 ºC to 20 ºC.

- Do not thin for any reason.

- There should be no standing water on concrete surfaces.