Sikafloor® Morritex® Epoxy Cove Mortar

• Potential contribution for LEED® projects. 

• Meets the requirements of CFIA and USDA for use in food plants.

2 years in original, unopened package.

Store dry between +5 °C and +32 °C (41 °F and 89 °F).

~5 g/L

Minimum ~0 °C (~32 °F)   Maximum ~50 °C (~122 °F)

Components A+B+C = Mix full units only

Condition product at temperatures between +18 °C and +30 °C (65 °F and 86 °F) before using.

Minimum: +10 °C (50 °F) / Maximum: +30 °C (85 °F)
Mixing and application attempted at material, ambient and/or substrate temperature conditions less than +18 °C (65 °F) will result in a decrease in product workability and slower cure rates. 

Maximum 85 % (during application and curing).

Substrate must be at least 3 ˚C (5 ˚F) above the Dew Point to reduce the risk of condensation, which may lead to adhesion failure or “blushing” on the floor finish.  Be aware that the substrate temperature may be lower than the ambient temperature.

Minimum: +10 °C (50 °F) / Maximum: +30 °C (85 °F) 

Do not apply while ambient and substrate temperatures are rising, as pinholes may occur. Ensure there is no vapour drive at the time of application. Refer to ASTM D4263, may be used for a visual indication of vapour drive.

Moisture content of concrete substrate must be ≤ 4 % by mass (pbw – part by weight) as measured with a Tramex®CME / CMExpert type concrete moisture meter on mechanically prepared surface according to this product data sheet (preparation to ICRI / CSP 3 - 4).  If moisture content of concrete substrate exceeds 4 % by mass (pbw – part by weight) as measured with Tramex® CME / CMExpert type concrete moisture meter, use Sikafloor®-1610 or Sikafloor®-81 EpoCem®CA.

ASTM F2170 internal probe testing is not a substitute for measuring substrate moisture content with a Tramex® CME / CMExpert type concrete moisture meter as described above.  When relative humidity tests for concrete substrate are conducted per ASTM F2170 for project specific requirements, values must be ≤ 85 %. If values exceed 85 %, according to ASTM F2170, use Sikafloor®-1610 or Sikafloor®-81 EpoCem®CA.

Curing times will vary according to ambient air and substrate temperatures and relative humidity.

Freshly applied material should be protected from dampness, condensation and water for at least 24 hours.

Mechanical, chemical and physical properties will be fully achieved at full cure.

Note: If the Waiting/ Recoat time has passed the previous coat must be lightly sanded, to remove all gloss; vacuum cleaning and solvent wiping will be necessary to remove all traces of dust. The surface should be a uniform dullness, with no gloss present after clean-up and before applying the next coat.

~5.8 linear metres (~19 linear feet) per kit.

coverage rate calculation is based on a 100 mm x 100 mm (4 in x 4 in) high cove applied at 4 mm (3/16 in) thickness with a 25 mm (1 in) radius cove trowel. 

Note: Actual coverage rates and material consumption will depend upon porosity and profile of substrates. Test sections are recommended to establish correct coverage.

Concrete surfaces must be clean and sound. Remove all dust, dirt, existing paint films, efflorescence, bleeding, laitance, form oils, hydraulic or fuel oils, brake fluid, grease, fungus, mildew, biological residue or any other contaminants which may prohibit good bond. Prepare the surface by appropriate mechanical means in order to achieve a profile equivalent to ICRI-CSP 3-6. The compressive strength of the concrete substrate should be at least 25 MPa (3 625 psi) at 28 days with a minimum of 1.5 MPa (218 psi) in tension at the time of application. Repairs to cementitious substrates, filling of blowholes, levelling of irregularities, etc. should be carried out separately using an appropriate Sika® profiling mortar. Contact Sika Canada for recommendations.

Edge Terminations - Installation of an integral cove base is normally terminated on vertical surfaces using one of the following application methods, chosen in accordance with the substrate and in-service requirements:
  

1. Mark a level, straight line at the appropriate height; adhere or mechanically fasten a preformed, “L”-shaped, noncorroding, metal cap divider strip. The outward edge of the strip should produce a 3 mm to 4 mm (1/8 in to 3/16 in) wide gap to accommodate a consistent thickness of trowelled cove mortar. To create an optional, watertight seal between the divider strip and wall assembly, clean both surfaces and apply a fillet bead of Sikaflex® sealant. Contact Sika Canada Technical Sales for a specific recommendation.

 
2. On concrete substrates, to produce a smooth transition between the wall system and floor, mark a level, straight line at the appropriate height and dry-cut a 3 mm (1/8 in) deep key/chase. Apply masking or duct tape along the outside edge of the key/chase to protect the adjacent surfaces during installation of the cove mortar. Press the mortar into the key/chase and smooth the surface to create a flush transition with the wall. Note: always remove the protective tape before the epoxy primer or epoxy cove mortar begins to harden.

 
Transition Detailing - Typical detailing of vertical surfaces with metal cap transition strip and vertical surfaces with a smooth transition to be executed as illustrated in the document Sikafloor® Morritex® Epoxy Cove Mortar - Typical Details. Available upon request.

 
Expansion Joints - These should be provided in the substrate at the intersection of dissimilar materials. Isolate areas subject to thermal stresses, vibration movements or around load-bearing columns and at vessel sealing rings.

Mixing will be affected by temperature; condition materials for use to between +18 °C and +30 °C (65 °F and 86 °F).

Do not hand mix Sikafloor® materials. Mechanically mix only.  A Kol-type mixer, incorporating a motor spun mixing pail and a shear angle mixing blade, is recommended.

Pre-stir Components A and B separately, making sure all pigment is uniformly distributed and even consistency is achieved. Start mixer; add Component A and Component B and blend for one (1) minute. Add Component C (aggregate) to the mix, incorporating slowly into the liquid over a period of 15 seconds. DO NOT DUMP! Allow Component C to blend for a further two (2) minutes to ensure complete mixing. During the mixing operation, scrape down the sides and bottom of the container at least once with a flat or straight-edge trowel to ensure complete mixing of Components A+B+C. Mix full units only.

Primer Coat: Mix and apply Sikafloor® Vertical Epoxy Primer (see Product Data Sheet for complete instructions) at a rate of approximately 4 m²/L (160 ft²/US gal.), using a brush or roller to provide a uniform coverage of 10 mil. Primer must be tacky during the application of Sikafloor® Morritex® Epoxy Cove Mortar. Only mix and apply the amount of primer that can be overlaid before it loses its tackiness; approximately one (1) hour at +20 °C (68 °F). If the primer becomes glossy or loses tackiness, remove any surface contaminates and recoat with additional Sikafloor® Vertical Epoxy Primer.

Mortar: Apply Sikafloor® Morritex® Epoxy Cove Mortar using steel trowels to spread and compact the mortar on vertical surfaces. Bottle coves and other shaped fillets can be achieved using the appropriate tools. A light brushing while the mortar is still workable will close any surface voids. Allow a minimum eight (8) hour cure period at +23 °C (73 °F) before overcoating.

Clean all tools and equipment with Sika® Epoxy Cleaner. Once hardened, product can only be removed mechanically.