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Durock Alfacing International PREP COAT NCP

PREP COAT NCP, Non-cementitious Prep Coat, is formulated with a 100% styrene acrylic emulsion. It is a trowelapplied high performance coating for use as an optional base coat on the DuROCK PUCCS RMC and InsulROCK RMC Systems, as well as the DuROCK Exterior Finish Systems. NCP is a factory-mixed base coat that does not require the addition of water or Portland cement. NCP is normally used only as a base coat on combustible construction. However, on existing EIFS installations where it may be necessary to re-finish the system, NCP is recommended for skimming over-top of existing EIFS finish coats to level the surface prior to application of a new DuROCK Finish. NCP is a flexible and durable base coat that has greater flexibility than polymer based cement base coats, hence, it is ideal for areas where greater flexibility may be required. When used as a skim coat, it is intended to be applied very tight.

Product Type: Base Coat

Application Area: Decorative Surfaces, Stucco

Compatible Substrates & Surfaces: Concrete, Masonry

Features: Breathable, Combustion Resistant, Durable, Flexible, Freeze/Thaw Stability, High Performance, Low Water Absorption

Application Method: Trowel

Technical Data SheetSafety Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Product Type

Base Coat

Technologies

Ready-to-Use Products

Product Families

Ready-to-Use Products — Paints & Coatings

Base Coats & Undercoats

Features & Benefits

Ready-to-Use Product Features

Breathable,

Combustion Resistant,

Durable,

Flexible,

Freeze/Thaw Stability,

High Performance,

Low Water Absorption

Applications & Uses

Markets

Building & Construction,

Paints & Coatings

Applications

Paints & Coatings — Building & Construction

Concrete Coatings & Stains

Building & Construction — Decorative Materials & Finishes

Other Decorative Materials & Finishes

Application Area

Decorative Surfaces,

Stucco

Application Method

Trowel

Compatible Substrates & Surfaces

Concrete,

Masonry

Applications & Coverage
  • Apply NCP with a stainless steel trowel to achieve a minimum dry thickness of at least 2.0 mm ( 1 /12 inch) and embed DuROCK Fiber Mesh as per system specifications. This may require two passes, allowing the first coat to cure sufficiently to be dry and firm to the touch before application of the second coat. Applied as an adhesive, NCP shall be rendered with a notched trowel, conforming to the adhesive pattern delineated in the system specifications.
  • Substrate must be clean, dry, and free of cracks or loose material. Surface and ambient temperatures must be at least 4°C (40°F) a minimum of 24 hours, and must remain so until NCP has dried.
  • Do not apply NCP in direct sunlight at temperatures exceeding 30°C (86°F) and protect from winds exceeding 25 km/hr (15 mph) as well as precipitation for at least 24 hours.

Properties

Soluble in
Water
Physical Properties
ValueUnitsTest Method / Conditions
Tack-Free Time2 - 3hours-

Packaging & Availability

Packaging & Availability

NCP is available in 19 L (4.18 gallon) pails (25kg/pail), yielding approximately 12 m2 (130 ft2 ) at 2.0 mm (1 /12 inch) dry thickness.

Storage & Handling

Pot Life
0.5 - 0.75 (hours)
Shelf Life
3 years
Storage & Mixing
  • Store NCP above 4°C (40°F) and below 40°C (104°F), off the ground and in a dry place away from direct sunlight. Employ temporary protection measures as needed. Under no circumstances shall NCP be permitted to freeze.
  • Using a stainless steel or corrosion resistant mixing blade and power drill, mix at 400 – 500 rpm, ensuring not to induce air into the product, until a uniform consistency is attained.
  • Accelerators and other additives are prohibited and will void warranty. Discard any material that has begun to stiffen.