High strength Portland cement-based poured underlayment. Durock™ Brand UltraCap® Self-Leveling Underlayment is ideal over concrete and wood subfloors in interior applications.

Main Features

Durock™ Brand UltraCap® Self-Leveling Underlayment is an economical, fast-applying Portland cement-based floor underlayment for interior use over concrete and wood subfloors. With an approximate compressive strength of 5000 psi (after 28 days), Durock™ Brand UltraCap® Self-Leveling Underlayment:
  • Is fast-applying and fast-setting – allows for return of light trade traffic within 24 hours
  • Provides strong self-leveling properties
  • Meets requirements of ASTM F-710 “Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring”
  • Offers a smooth, crack-resistant surface
  • May assist in obtaining LEED® credits
  • Is engineered and manufactured by USG


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

Documents & Files

Submittal Sheets & Specifications

White Papers

Catalogs & Brochures

Installation & Technical Manuals

SDS, Certifications & Reports