DESCRIPCIÓN
LIQUID BONDING ADMIXTURE
 
Description
 
AKKRO-7T is a non-redispersable, liquid bonding admixture used to produce polymer modi ed concrete and mortar. AKKRO-7T is a milky white, water based emulsion of high solids acrylic polymers and modi ers. AKKRO- 7T is non-yellowing, and has excellent resistance to ultraviolet degradation, heat and most common chemicals. AKKRO-7T does not alter the color of the mixture.
 
Primary Applications
 
Cement based coatings, toppings, patching mortars, leveling compounds, stucco, and terrazzo
Mixing liquid for TAMOSEAL, CONCRETE FINISHER, TAMMS SBC AND TAMMS STUCCO FINISH
 
Features/Benefits
 
Increases exural and tensile strength
Improves bond strength
Reduces shrinkage
Resists water penetration
Protects against freeze-thaw damage
Non-yellowing
 
Packaging
 
AKKRO-7T is packaged in 55 gal (208 L) drums, 5 gal (18.9 L) pails and cases of 6/1 gal (3.79 L) plastic bottles.
 
Shelf Life
 
1 year in original, unopened container.
 
Specifications/Compliances
 
Complies with ASTM C 1059, Type II USDA compliant
 
Directions for Use
 
Surface Preparation: Surface must be structurally sound, clean, free of dust, dirt, oil, curing or form release compounds, paint, laitance, ef orescence and other contaminants. New concrete and masonry surfaces must be cured 7 days. Provide an absorptive surface on smooth precast or formed concrete by abrading the surface. Follow the surface preparation directions for the product in which AKKRO-7T is being used as an admixture.
Mixing: Stir AKKRO-7T slowly and thoroughly using slow speed mixing equipment and a clean container. Do not aerate the AKKRO-7T.
 
Recommended Mixtures:
 
Bonding Slurry: Dry mix 1 part portland cement with 3 parts dry sand and add undiluted AKKRO-7T to produce a pourable slurry coat. Brush mixture thoroughly into voids and pores of surface to eliminate air pockets. Before slurry coat dries, follow immediately with patching materials that are compatible with portland cement.
Patches, Overlays And Toppings: For depths 1/2 in (12.7 mm) or greater, mix 1 part AKKRO-7T with 3 parts potable water. Proportion dry sand, cement, aggregate and add measured amount of mixing liquid. Featheredging and repairs less than 1/2 in (12.7 mm) deep will require additional AKKRO-7T in the mix.
Terrazzo: Make up a mixing liquid of 1 part AKKRO-7T to 3 parts potable water.
Thin Coat Wall Applications: Manufactured wall coatings including TAMOSEAL, CONCRETE FINISHER, TAMMS SBC, and TAMMS STUCCO FINISH; mix 1 part AKKRO-7T to 3 parts potable water for mixing liquid, or as directed in instructions for mixing coating.
Field Mixed Stucco: Mix 1 part AKKRO-7T to 3 parts potable water.
 
Cement Plaster Coatings: Applications 3/8 in (9.5 mm) or less; use 1 part AKKRO-7T to 2 parts potable water. Applications over 3/8 in (9.5 mm); use a 1:3 mixture.
 
Pointing Mortars: Manufactured tuckpointing mortars such as JOINT-DRI and other special mortars for thin applications; mix 1 part AKKRO-7T to 3 parts potable water for mixing liquid.
 
Application: Use only light pressure on trowel and nish with as few strokes as possible. Keep trowel clean and wet to prevent sticking. Do not over trowel. Mixes with AKKRO-7T do not normally require curing, but on hot, dry or windy days, it is advisable to cover with moist burlap for 24 hours or as recommended. Air-cure the surface for 2 to 4 days for normal use, and 4 to 7 days for heavy traf c areas. Refer to “PRECAUTIONS,” for curing water containment structures.
 
Clean-Up
 
Clean tools and equipment with detergent and water immediately following use. Clean drips, spills and smears while mix is still wet. Mixes containing AKKRO-7T are extremely dif cult to remove if allowed to dry before cleaning.
 
Precautions/Limitations
 
Do not apply mixes modi ed with AKKRO-7T when the temperature is below, or expected to fall below 40°F (4°C) within 48 hours.
 
Do not use with air entrained cements.
Excessive moisture and high humidity will slow curing time.
Provide adequate ventilation when using AKKRO-7T in enclosed tanks, reservoirs or other areas where air circulation is limited.
Air-cure cisterns, tanks or pools for minimum 7 to 10 days before lling with water.
Concrete mix designs using AKKRO-7T should be evaluated and tested for performance and application properties prior to use.
Store between 40°F to 90°F (4°C to 32°C). Protect from freezing.• If frozen, place in a warm room to thaw. Do not use direct heat or force thawing.
In all cases, consult the Material Safety Data Sheet before use.