Chem-tect TM

 RB 300P

 Vinyl ester Primer

    
 

PRODUCT CHARACTERISTICS

 

         Primer system which improves adhesion of secondary coats or for sealing of concrete surfaces.

         Suitable for application to concrete, steel, glass and fibreglass substrates.

 

PRODUCT DESCRIPTION

 

         Two pack vinyl ester resin and hardener.

 

PRODUCT INFORMATION

                Volume solids:

100%
                Mix ratio:

Hardener (HA 300) 1%-3% volume by weight

(depending on temperature and other environmental factors).
                Typical thickness range: 25 - 100 microns
                Theoretical coverage:

16.6m²/kg @ 50 microns.

(Allow for application losses, surface irregularities, etc).

SURFACE PREPARATION

 

            Pre-treatment

           

            Surfaces shall, if necessary, be degreased in order to ensure that all oil, grease and surface

            contaminants are removed prior to blast cleaning.

 

            Blast Cleaning

           

            STEEL SUBSTRATE

            Abrasive blast to SA2½ in accordance with ISO 8501-1.  Minimum 75 microns surface profile.

            NEW CONCRETE

            Allow 28 days for new concrete to dry out prior to commencement of work.

            May require light abrasive blasting to achieve suitable key for maximum adhesion purposes.

            OLD CONCRETE

            Pre-treatment required to remove contaminants from substrate and to provide a uniformly

            roughened surface.  Approximately 0.5-1.0cm should be removed by this operation.

            Depending on condition of substrate and operating environment, pre-treatment may involve

            a number of methods, i.e. : - Abrasive blasting, wire brushing, power grinding or acid etching.

            Mechanical pre-treatment to be followed by thorough cleaning preferably by vacuum.

 

APPLICATION DATA

 

                          Method: Conventional/airless spray, brush or roller.
                          Thinner: No thinning agents to be added.
                          Cleaner: S11
                          Recoating interval: Minimum:       1 - 3 hrs (touch dry).
                          Pot life: 1 - 4 hrs depending on temperature.
                          Curing time:

24 hrs @ 15ºC (depending on temperature and other environmental conditions).

 

APPLICATION

 

                          Constituents: Vinyl ester resin and hardener.
                          Conventional/airless spray:  

Pump (minimum 33:1 ratio).

Tip size 15 - 21 thou.
                          Brush/roller:

For inaccessible or awkward areas, or when spray

application is not required or feasible.

 

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