SikaTop®-121 Plus
SikaTop®-121 Plus is a polymer-modified, with migrating corrosion inhibitor added, cementitious, two-component, fast-setting, trowel- or rub-applied, thin-coat mortar for concrete repairs, for skin coats, filling bugholes, honeycombing and for feather edging.
- Superior abrasion resistance over conventional cement mortar
- High bond strength assures superior adhesion
- Compatible with thermal coefficient of expansion of concrete
- Easily applied to clean, sound substrates. May be featheredged
- Good freeze/thaw resistance
- Increased resistance to de-icing salts
- Formulated with inert, non-reactive aggregates to eliminate potential Alkali-Aggregate Reactivity (AAR)
- Not a vapour barrier
- Not flammable
- Ministry of Transport Québec (MTQ) acceptance
- Product qualified by The Road Authority (TRA)
- Product recognized by the British Columbia Ministry of Transportation (BC MoT)
- Meets the requirements of CFIA and USDA for use in food plants
Usage
- Use on grade, above, and below grade on concrete and mortar
- Use on horizontal, vertical and overhead surfaces
- Block filler and skin coats
- Repair for gouges, broken edges, bugholes, pores, honeycombing
- Adhesive for insulation materials, lightweight concrete, foam insulation board
Advantages
- Superior abrasion resistance over conventional cement mortar
- High bond strength assures superior adhesion
- Compatible with thermal coefficient of expansion of concrete
- Easily applied to clean, sound substrates. May be featheredged
- Good freeze/thaw resistance
- Increased resistance to de-icing salts
- Formulated with inert, non-reactive aggregates to eliminate potential Alkali-Aggregate Reactivity (AAR)
- Not a vapour barrier
- Not flammable
- Ministry of Transport Québec (MTQ) acceptance
- Product qualified by The Road Authority (TRA)
- Product recognized by the British Columbia Ministry of Transportation (BC MoT)
- Meets the requirements of CFIA and USDA for use in food plants
Packaging
25 kg (55 lb) unit
Colour
Concrete grey when mixed
Product Details
ENVIRONMENTAL INFORMATION
- Conformity with LEED®v4 MR Credit (Option 1): Building Product Disclosure and Optimization – Environmental Product Declarations
- Conformity with LEED®v4 MR Credit (Option 1): Building Product Disclosure and Optimization - Material Ingredients Reporting
- Conformity with LEED®v4 MR Credit (Option 1): Building Product Disclosure and Optimization - Sourcing of Raw Materials
Shelf Life
12 months in original, unopened packaging
Storage Conditions
Stored (unopened) in dry place at temperatures between +5 °C and +32 °C (41 °F and 89 °F). For best results, condition product at temperatures between +15 °C and +24 °C (59 °F and 75 °F) before using. Protect Component A from freezing. If frozen, discard.
Compressive Strength
| 24 hours | ~ 9 MPa (1 305 psi) |
| 28 days | ~ 35 MPa (5 076 psi) |
Application
Mixing Ratio
A:B = 1:6 depending on consistency required
Application Time
Approx.15 min after mixing the mortar
Finishing Time
Approx. 20 - 60 min after placing the mortar
Yield
Approx. 11.5 L (0.4 ft3)
MIXING
Mix mechanically using a heavy duty, low-speed drill (300 - 450 rpm) with a mixing paddle (ex.: Mud Mixer Type). Shake Component A before using, then pour approx. 85 % of Component A into mixing container. Add Component B while continuing to mix. Mix to a uniform consistency for a maximum of three (3) minutes. Add additional Component A to mix if a wetter consistency is required. Should smaller quantities be needed, be sure that components are dosed in correct ratio and thoroughly premix Component B before dosing. Ratio is A:B = 1:6 by weight approx.
APPLICATION
At time of application, surfaces should be damp (saturated surface dry) with no glistening water. Mortar must be scrubbed into substrate filling all pores and voids. Alternatively, SikaTop® Armatec-110 EpoCem® can be used as a bonding agent. Apply mortar before bond coat dries, then screed. Force product against edge of repair, working toward center. Allow mortar to reach initial set [20 to 60 minutes after placing at +23 °C (73 °F)], then finish with wood or sponge float for a smooth surface. For extra smooth finish, wipe steel trowel with A component during finishing. If repair requires several lifts, each lift must be applied as soon as the previous lift will support it and all surfaces but the last must be left rough. Unfinished work from previous day must be roughened and any polymer film removed to ensure bond.
CURING TREATMENT
As per ACI 308 recommendations for cement concrete, curing is required. To achieve performance consistent with Technical Data, curing must be provided by recognized curing methods, such as wet burlap covered with white polyethylene film or approved water-based curing compound, such as Sika® Florseal WB-18 & -25. Alternatively, the use of Sika® Ultracure DOTTM or NCFTM wet curing blankets is strongly recommended. Curing must commence immediately after placing and finishing. Moist-curing must be maintained for the first 24 hours only. Protect freshly applied mortar from direct sunlight, wind, rain and frost.
CLEAN UP
Clean all tools and equipment after use with water. Once hardened, the product can only be removed manually or mechanically.
