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SpecChem SC Concrete Finish

SpecChem SC Concrete Finish

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Cement-based decorative and damp proofing coating

SC Concrete Finish is a decorative, cement-based resurfacing mortar designed for smoothing, resurfacing, rubbing, sacking, and restoring concrete surfaces. It also serves as a waterproofing coating for vertical concrete and masonry substrates, offering a uniform, water-resistant coating that fills internal voids while allowing full breathability.

  • Provides a waterproof barrier for interior/exterior, above/below grade applications on masonry and concrete.
  • Can be applied to concrete block, brick, stone, precast, or formed concrete.
  • Offers a consistent texture and uniform color, providing an alternative to traditional jobsite sacking mixes.
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Application

Surface Preparation:

Ensure the surface is structurally sound, clean, and free from dirt, release agents, efflorescence, curing compounds, and other contaminants. Remove form marks and other protrusions to avoid show-through. Repair surface defects, such as cracks and voids, with SC Concrete Finish mixed to a mortar consistency. Prep areas by cutting back wires a minimum of 3/4” and repairing with SpecPatch or SpecPlug. Dampen the surface with clean water just before application.

Mixing:

Mechanically mix SC Concrete Finish using a slow-speed mixer to thoroughly disperse the ingredients for about three minutes without over-mixing. Begin by adding approximately half of the required 5 quarts of liquid into a clean container and start mixing at a slow speed. Adjust the mixing liquid based on the application method. Gradually add SC Concrete Finish and the chosen admixture (water or StrongBond mixture) to achieve a heavy, pancake batter consistency. Allow the mixture to rest for three minutes to ‘fatten,’ then remix and adjust to the desired consistency.

Application Methods:

  • Brush-Applied:Use a six-inch cement mason’s brush to apply a heavy coat with long, smooth horizontal strokes, ensuring enough material is used to fill voids. All final strokes should be in one direction for an even texture and finish.
  • Spray-Applied:For a sprayable consistency, mix with 1012 pints of liquid using plaster or low-pressure spray equipment designed for cement-based products.
  • Trowel-Applied:For a stiffer consistency suitable for severe water pressure conditions, mix with 710 pints of liquid.

Packaging

Available in 50 lb bags or 50 lb pails.

Shelf Life

Shelf life of unopened bags is 12 months when stored in a dry, cool area away from direct sunlight.

Coverage

Coverage: Approximately 45-50 sq-ft per mix at 1/8” thickness.

Test Data

  • Initial Set (ASTM C266):100 minutes
  • Final Set (ASTM C266):200 minutes

Compressive Strength (ASTM C109):

  • 7 days: 2500 psi
  • 28 days: 4000 psi

Flexural Strength (ASTM C348):

  • 7 days: 350 psi
  • 28 days: 800 psi
  • Tensile Strength (14 days, ASTM C190):385 psi
  • Water Absorption (ASTM C642):4.5%
  • Freeze/Thaw Resistance (ASTM C666):No change