SikaTop 121 PLUS
Product Data Sheet Edition 8.2003 Identification no. 185 SikaTop 121 Plus
SikaTop® 121 PLUS Two-component, polymer-modified, cementitious leveling/pore sealing mortar plus FerroGard 901 penetrating corrosion inhibitor
Description SikaTop 121 PLUS is a two component, polymer-modified, leveling and pore sealing mortar with the ad-
ditional benefit of FerroGard 901, penetrating corrosion inhibitor. SikaTop 121 PLUS provides a smooth substrate, free of irregularities and bug holes for following protective coatings.
Where to Use
As a leveling/pore sealing mortar prior to protective coatings. ∎
On horizontal, vertical and overhead surfaces, interior and exterior. ∎
On grade, above and below grade, on concrete and mortar substrates. ∎
Block filler. ∎
Minor repair for gouges and broken edges.
Excellent adhesion to concrete and mortar substrates. ∎
High flexural and compressive strengths. ∎
Increased density - improved carbon dioxide resistance (carbonation) without adversely affecting water vapor transmission (not a vapor barrier). ∎
Increased freeze/thaw durability and resistance to deicing salts. ∎
Adds effective cover over rebars. ∎
Enhanced with FerroGard 901, a penetrating corrosion inhibitor - reduces corrosion even in the adjacent concrete. ∎
Compatible with coefficient of thermal expansion of concrete - Passes ASTM C-884 (modi- fied). ∎
Can be applied over Sika FerroGard 903, corrosion inhibiting impregnation. ∎
Not flammable, non-toxic.
Yield 0.4 cu. ft./unit
Coverage One unit covers approximately 65 sq. ft. (6 m2) of smooth surface at 1/12 inch (2 mm) thickness.
Packaging Component ‘A’ - 1 gal. plastic jug; 4/carton. Component ‘B’ - 46.5 lb. multi-wall bag.
Typical Data (Material and curing conditions @ 73°F (23°C) and 50% R.H.)
Shelf Life One year in original, unopened packaging.
Storage Conditions Store dry at 40°-95°F (4°-35°C). Condition material to 65°-75°F before using.
Protect Component ‘A’ from freezing; if frozen, discard.
Color Concrete gray when mixed.
Mixing Ratio Plant-proportioned kit. Mix entire unit.
Application Approximately 45 min. after adding Component ‘B’ to Component ‘A’.
Time Application time is dependent on temperature and relative humidity.
Finishing Time 45 to 60 min. after combining components; depends on temperature, relative
humidity, and type of finish desired.
Flexural Strength (ASTM C-293) 28 days 2,000 psi (13.8 MPa)
Splitting Tensile strength (ASTM C-496) 28 days 750 psi (5.2 MPa)
Bond Strength* (ASTM C-882 modified) 28 days 2,000 psi (13.8 MPa)
Bond Strength Pull-Out Test (ACI 503R-30 modified) 28 days 350 psi (2.4 MPa) substrate
Compressive Strength (ASTM C-109) 1 day 1,250 psi (8.6 MPa)
7 days 5,000 psi (34.5 MPa) 28 days 6,000 psi (41.4 MPa)
Permeability (AASHTO T-277) 28 days Approximately 500 Coulombs
Corrosion Testing for ferrogard 901 Cracked Beam Corrosion Tests: Reduced corrosion rates 63% versus control specimens. ASTM G109 modified after 400 days.
* Mortar scrubbed into substrate.
How to Use Substrate Concrete, mortar, and masonry products.
Surface Preparation Remove all deteriorated concrete, dirt, oil, grease and all bond-inhibiting materials from the surface. Surface
should be open-pore and textured (CSP-4). Saturate surface with clean water. Substrate should be satu- rated surface dry (SSD) with no standing water during application.
Priming For priming of reinforcing steel use Sika Armatec 110 EpoCem (consult Technical Data Sheet).
Concrete Substrate: Prime the prepared substrate with a brush or sprayed applied coat of Sika Armatec 110 EpoCem (consult Technical Data Sheet). Alternately, a scrub coat of SikaTop 121 Plus can be applied prior to placement of the mortar. The repair mortar has to be applied into the wet scrub coat before it dries.
Mixing Pour approximately 4/5 of Component A into mixing container. Add Component B while continuing to mix. Mechanically mix with a low-speed drill (400-600 rpm) and paddle or appropriate-size mortar mixer. Mix to uniform consistency, maximum 3 minutes. Add remaining Component A to mix if a more loose consistency is desired. Manual mixing can be tolerated only for less than a full unit.
Application & Finish SikaTop 121 PLUS can be applied by trowel, notched trowel, stiff bristle, or low pressure hopper gun. Work
the material well into the prepared substrate, filling all pores and voids. As soon as the mortar layer starts to set, a uniform surface texture can be obtained by rubbing the surface with a fine sponge or a plastic trowel. Do not overwork SikaTop 121 PLUS during finishing and avoid the use of additional water.
Curing As per ACI recommendations for portland cement concrete, curing is required. Protect the freshly applied
mortar against direct sunlight, wind, frost and rain. Curing compounds adversely affect the adhesion of protective coatings. Therefore, do not use a water based curing compound, if the leveling mortar is going to be overcoated.
Application thickness: Minimum 1/12 inch (2 mm); Maximum 1/6 inch (4 mm) ∎
Minimum ambient and surface temperatures, 45°F (7°C) and rising at time of application. ∎
As with all cement based materials, avoid contact with aluminum to prevent adverse chemical reaction and possible product failure. Insulate potential areas of contact by coating aluminum bars, rails, posts etc. with an appropriate epoxy such as Sikadur Hi-Mod 32.
Caution Component ‘A’ - IRRITANT - May cause skin/eye/respiratory irritation. Avoid breathing vapors. Use with
adequate ventilation. Avoid skin and eye contact. Safety goggles and rubber gloves are recommended.
Component ‘B’ - IRRITANT; SUSPECT CARCINOgEN - Contains portland cement and sand (crystalline silica). Skin and eye irritant. Avoid contact. Dust may cause respiratory tract irritation. Avoid breathing dust. Use only with adequate ventilation. May cause delayed lung injury (silicosis). IARC lists crystalline silica as having sufficient evidence of carcinogenicity in laboratory animals and limited evidence of carcinogenicity in humans. NTP also lists crystalline silica as a suspect carcinogen. Use of safety goggles and chemical resis- tant gloves is recommended. If PELs are exceeded, an appropriate, NIOSH approved respirator is required. Remove contaminated clothing.
First Aid Eyes: Hold eyelids apart and flush thoroughly with water for 15 minutes. Skin: Remove contaminated
clothing. Wash skin thoroughly for 15 minutes with soap and water. Inhalation: Remove person to fresh air. Ingestion: Do not induce vomiting. In all cases, contact a physician immediately if symptoms persist.
Clean Up In case of spillage, scoop of vacuum into appropriate container, and dispose of in accordance with current,
applicable local, state and federal regulations. Keep container tightly closed and in an upright position to prevent spillage and leakage.
Mixed components: Uncured material can be removed with water. Cured material can only be removed mechanically.
KEEP CONTAINER TIGHTLY CLOSED • KEEP OUT OF REACH OF CHILDREN • NOT FOR INTERNAL CONSUMPTION • FOR INDUSTRIAL USE ONLY All information provided by Sika Corporation (“Sika”) concerning Sika products, including but not limited to, any recommendations and advice relating to the application and use of Sika products, is given in good faith based on Sika’s current experience and knowledge of its products when properly stored, handled and applied under normal conditions in accordance with Sika’s instructions. In practice, the differences in materials, substrates, storage and handling condi- tions, actual site conditions and other factors outside of Sika’s control are such that Sika assumes no liability for the provision of such information, advice, recommendations or instructions related to its products, nor shall any legal relationship be created by or arise from the provision of such information, advice, recommendations or instructions related to its products. The user of the Sika product(s) must test the product(s) for suitability for the intended application and purpose before proceeding with the full application of the product(s). Sika reserves the right to change the properties of its products without notice. All sales of Sika product(s) are subject to its current terms and conditions of sale which are available at www.sikacorp.com or by calling 800-933-7452. Prior to each use of any Sika product, the user must always read and follow the warnings and instructions on the product’s most current Technical Data Sheet, product label and Material Safety Data Sheet which are available online at www.sikaconstruction.com or by calling Sika's Technical Service Department at 800-933-7452. Nothing contained in any Sika materials relieves the user of the obligation to read and follow the warnings and instruction for each Sika product as set forth in the current Technical Data Sheet, product label and Material Safety Data Sheet prior to product use. LIMITED WARRANTY: Sika warrants this product for one year from date of installation to be free from manufacturing defects and to meet the technical properties on the current Technical Data Sheet if used as directed within shelf life. User determines suitability of product for intended use and assumes all risks. Buyer’s sole remedy shall be limited to the purchase price or replacement of product exclusive of labor or cost of labor. NO OTHER WARRANTIES ExPRESS OR IMPLIED SHALL APPLY INCLUDINg ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. SIKA SHALL NOT BE LIABLE UNDER ANY LEgAL THEORY FOR SPECIAL OR CONSEqUENTIAL DAMAgES. SIKA SHALL NOT BE RESPONSIBLE FOR THE USE OF THIS PRODUCT IN A MANNER TO INFRINgE ON ANY PATENT OR ANY OTHER INTELLECTUAL PROPERTY RIgHTS HELD BY OTHERS. Visit our website at www.sikaconstruction.com 1-800-933-SIKA NATIONWIDE Regional Information and Sales Centers. For the location of your nearest Sika sales office, contact your regional center.
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