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admixtures

R20 SURFACE RETARDER

USER CATEGORY :

DIY TRADES COMMERCIAL

Packaging

  • 5L
  • 20L
  • 200L

PRODUCT INFORMATION & RESOURCES

DESCRIPTION

CEMIX R20 RETARDER is a ready to use waterbased, light green liquid, which reveals aggregate in fresh concrete by delaying the surface set, so that the mortar paste may be brushed and washed from between the aggregate particles to produce an attractive exposed finish. Use on footpaths, patios, pool surrounds etc. Also use for preparing concrete construction joints for better bonding.

TYPICAL APPLICATIONS & USES

CEMIX R20 RETARDER is generally used for revealing aggregate in fresh concrete by delaying the surface set, so that the mortar paste may be brushed and washed from between the aggregate particles to produce an attractive exposed finish. CEMIX R20 RETARDER can be used on footpaths, patios, pool surrounds etc. CEMIX R20 RETARDER can also be used for preparing concrete construction joints for better bonding.

ADVANTAGES

  • Can be diluted with water to decrease the depth revealed
  • Non staining
  • Non Corrosive
  • Non flammable
  • Can be sprayed with normal spray equipment or garden spray
  • Easy to use

APPLICATION

Place concrete in formwork (3 parts cement, 4 parts sand, 6 parts aggregate by volume in a typical mix) and wood float surface covering all stones. Brush, spray or roller on CEMIX R20 RETARDER liberally, to the fresh concrete surface just as the surface water disappears, Protect the coated surface from wind, rain or hot sun. Within 12 – 24 hours after application remove retarded top layer of mortar with a stiff broom and hosed water, leaving a clean exposed aggregate surface. If extremely small is used, it is important not to start the wash off too early as bare spots may be created.

TECHNICAL DATA

  • Appearance – Green liquid
  • Yield / Coverage – Approximately 5m² per L.
  • Specific Gravity – 0.98

The data shown above reflects typical results based on laboratory testing under controlled conditions. Reasonable variations may occur on site.

AGITATION

It is important to agitate this product well before use.

STORAGE

CEMIX R20 RETARDER has a shelf life of 12 months minimum when unopened in original containers.

CLEANING

Clean all tools with water & brush immediately after use.