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Durock™ Brand UltraCap® Pro Self-Leveling Underlayment

Fast-applying, fast-setting Portland cement-based floor underlayment.

Key Documents & Design Files



Portland cement-based underlayment Durock™ Brand UltraCap® Pro Self-Leveling Underlayment is a fast-applying, fast-setting Portland cement-based floor underlayment for use over interior concrete subfloors and wood subfloors.

Main Features

Durock™ UltraCap® Pro Self-Leveling Underlayment provides a smooth and monolithic surface of up to 2 in. (50.8 mm) thick (deep fills up to 5 in. (127 mm), contact USG for further information). Durock™ UltraCap Pro Self-Leveling Underlayment:
  • Is formulated using Portland cement (ASTM C150)
  • Allows for quick return of normal trade traffic
  • Provides a minimum compressive strength of 5,000 psi (after 28 days drying time)
  • Offers a smooth, crack-resistant surface
  • May assist in obtaining LEED® MR Regional credits


  • Guest Rooms and Suites
  • Multi-Family Residential and Condos
  • Open Plan Offices
  • Patient Rooms
  • Single-Family Residential


Submittal Sheet PDF 259.2 KB


  • GREENGUARD Certification Yes

Physical Data

  • Approximate Compressive Strength 5,000 psi
  • Approximate Coverage 74-83 sq. ft.
  • Thickness Range FE - 2 in.

Documents & Files

Data Sheets & Specifications

Data/Submittal Sheet (English) PDF 259.2 KB

White Papers

Sell Sheet (English) PDF 2.0 MB

Catalogs & Brochures

Brochure (English)

SDS, Certifications & Reports

SDS (English) PDF 191.8 KB
Certificates (English) PDF 150.7 KB


Warranties (English) PDF 194.3 KB

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Question Guidlines

  • Questions should relate to this product specifically.
  • For help with pricing, availability, or delivery, please call 800.874.4968 (Monday–Friday, 7am–6pm Central)
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q & a

  • What moisture mitigation system is recommended to be used with USG Durock™ Brand Self-Leveling Underlayment products?

    Most moisture mitigation products will be compatible with USG Durock™ Brand Self-Leveling Underlayments. It is a good practice to check with the manufacturer of the moisture mitigation product before installing the self-leveling underlayment.

  • What are the MVER tolerances in the concrete substrate when using your USG Durock™ Brand Self-Leveling Underlayment products?

    The MVER tolerances are 5 lbs./1,000 s.f./24 hours.

  • What are approved substrates for the USG Durock™ Brand Self-Leveling Underlayment products?

    USG Durock™ Brand Performance Flooring products are primarily meant to be used over properly prepared concrete. The products can also be used with metal lath over engineer-approved, APA-Rated exterior glue plywood or oriented strand board (OSB) (i.e., APA-Rated Exterior or Exposure 1 panels) wood subfloors following the Tile Council of North America's F-185-11 specification at a minimum ½ in. depth.

  • What is the maximum RH requirement for installing USG Durock™ Brand Self-Leveling Underlayments over concrete slabs?

    The maximum RH requirement is 75-80%.

  • When applying self-leveling underlayment, is shot blasting required?

    We recommend shot blasting for two main reasons. First, it is very difficult to determine if there are any contaminants that may affect the bond of the underlayment to the substrate which must be removed prior to application. Secondly, shot blasting assures the best possible physical bond of the product. If you feel that you have a job that does not need to be shot blasted, please call for further discussions.

  • Have a question?

    Let us do the research. We'll get back to you as quickly as we can.

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  • Need help right away?

    Call our Technical Support team at 800-874-4968 (Monday-Friday, 7:30 am - 4 pm Central).