Raeco R-50 is a two component, concrete repair and topping compound consisting of a uniform, premixed blend of portland cements and graded washed silica aggregates witha liquid latex modifier to promote lasting surface adhesion, for renovation and new construction. R-50 can be applied from feathered edge to any depth. For thickness greater than 1/2" use appropriate aggregate. R-50 should be used for horizontal surfaces. Suitable for interor and exterior use. A sealer or coating is recommended when used for a wearing surface. R-50 provides excellent freeze-thaw resistance against the penetration of deicing salts and other contaminants. Raeco R-50 contains no gypsum, chlorides, ferrous metals or corrosive agents.

PROPERTIES
COMPRESSIVE STRENGTH, PSI (ASTM C-1439)
7 Days: 4710
28 Days: 5560

TENSILE STRENGTH, PSI (ASTM C-190)
28 Days: 850

FLEXURAL STRENGTH, PSI (ASTM C-256)
28 Days: 1700

SHEAR BOND, PSI (Dow Test Method)
7 Days: 650+

Flame Spread: 0

Fuel Contribution: 0

Smoke developement: 0

Compatible with most floor adhesives

Smooth or broom finish achievable

Horizontal application

Fire Retardant

Non-toxic

Corrosion resistant

U.S.D.A. approved

AREAS OF USE

Parking deck repairs and overlays

Horizontal and vertical applications

Exterior applications for walkways and ramps

Warehouse and industrial repairs or overlays

Areas exposed to heavy-duty loads

Leveling or creating pitch to drains

Rained out or freeze damaged slabs

Areas with varying weather cycles

Corrosion-resistant overlays

PACKAGING

50 lb. bags (22.5 kg.)

(40 bags per pallet)

APPROXIMATE COVERAGE
50lb. bag: 50 sq.ft. @ 1/8"

Bulked with #8 Silica sand:
50lb. bag: 18.75 sq.ft @ 1/2"

Bulked with 3/8" pea gravel:
50 lb. bag: 9.06 sq.ft. @ 1"

For Thickness:
1/2" to 1" use #8 silica sand @ 25lbs. per bag
1" and up use 3/8" pea gravel @ 25lbs. per bag

SURFACE PREPARATION
Surfaces to be covered must be structurally sound, clean and free of dust, oil, grease, sealers, curing compounds, laitance, release agents or other surface contaminants. For smooth surfaces, we recommend mechanical abrasion to achieve an acceptable surface profile. The cleaning and preparation method selected depends on both the sub-floor material and its condition. Acid etching is not recommended. For optimum adhesion, mix R-50 with the latex to a slurry consistency and brush thoroughly into the area to be covered. R-2000 may also be used as a bonding medium. DO NOT USE R-50 LATEX AS A BONDING AGENT.

MIXING
Raeco R-50 is mixed by adding R-50 latex at a rate of approximately 1 gallon (3.79 liters) of latex for each 50 lb. bag of dry powder. More or less latex may be added to obtain the desired consistency, but do not exceed 2 gallons (7.58 liters) of latex for each 50 lb. bag of R-50. The latex should be added to the mixing container first, then the R-50 powder, followed by the appropriate aggregate (when used).

Using a mixing paddle (a whip type is recommended) with a low speed drill (400 to 500 rpm), mix thoroughly (2 to 3 minutes) until the powder has been completely dispersed and the mix has acquired a smooth homogeneous texture. Do not add more latex binder once R-50 has started setting up. The pot life of the mix averages about 30 minutes and working time 30 to 45 minutes, depending on the temperature. It is recommended to mix only the amount of R-50 that can be applied within that amount of time.

APPLICATION
Apply the Raeco R-50 mixture with a trowel or straight edge, trowel to desired texture, on the prepared surface. Should a broom finish be desired, do so after placement. Do not add or spray latex onto the surface for finishing, it may cause the surface to spall. Rough spots or trowel marks may be sanded off the surface, using a medium to fine grit sandpaper after R-50 has setup. Sanding should be accomplished no later than 24 hours after application. Allow an adequate curing time before applying a sealer, by using the R-50 latex or a water based concrete sealer (surface or penetrating). When R-50 is going to be a wearing surface, a sealer or coating is recommended.

When R-50 is to be applied on surfaces other than concrete (i.e., wood, metal, terrazzo, gypsum underlayments, etc.), consult Raeco’s Technical Service Department for recommended preparation, bonding, and application procedures.

LIMITATIONS
Raeco R-50 should only be applied over substrates that are between 40° and 90° F. (4.4° and 32.2° C.) Do not apply in the rain, and do not allow to freeze before curing has taken place. When applying R-50 to thickness greater than 1/2" (12.7 mm), bulk the mix with the appropriate type and amount of aggregate (refer to Coverage’s" Section of Data Sheet).

WARNING
Raeco R-50 contains Portland cement and silica sand. Use of a dust respirator, safety goggles and rubber gloves are recommended. In case of contact with eyes, immediately flush with water and consult a physician. Avoid hazards by following all precautions found in the Material Safety Data Sheet (MSDS), product labels and technical literature. Please read this information prior to using product.