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3/4" Bullnose Transition Cap

Used to transition 3/4" radius bullnose corner bead to a 90° square corner for installing baseboard or crown molding

Bullnose to 90° transition caps simplify installation of baseboard or crown molding corners into 3/4" bullnose systems. Quick and easy to install, this product eliminates corner gaps and the need for time-consuming caulking and filling.

Application(s): Drywall

Can be used with metal, vinyl or paper-faced 3/4" bullnose corner bead for transition onto baseboard or crown molding up to 4-1/2" in width.

  • Prevents gaps between bullnose corner bead and baseboard or crown molding.
  • Eliminates need for time-consuming caulking and filling.
  • Used with baseboard or crown molding up to 4-1/2" in width.
  • For use with metal, vinyl or paper-faced corner beads.

Code Approvals & Performance Standards

  • ASTM C840 Standard Specification for Application and Finishing of Gypsum Board
  • ASTM C841 Standard Specification for Installation of Interior Lathing and Furring
  • ASTM C1047 Standard Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base
  • ASTM D3678 Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Interior - Profile Extrusions
  • SDS Vinyl Corp PVC Compounds


All stored materials shall be kept dry.  Materials shall be stacked off the ground, supported on a level platform, and protected from the weather.

PRoduct submittal SHeets

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Product Code Description
M859 3/4" Bullnose Transition Cap

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