Trim-Tex 923 3/8 in. Bullnose 3-Way Molded Corner, High Impact Polystyrene Drywall Corner Piece

Regular price $67.97

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Trim-Tex 923 3/8 in. Bullnose 3-Way Molded Corner, High Impact Polystyrene Drywall Corner Piece


The Trim-Tex 923 is a 3/8 in. medium bullnose 3-way molded corner used where multiple bullnose drywall beads meet, giving a clean finished corner without custom cutting. It is molded from durable, resilient high impact polystyrene and installs easily to speed up finishing. One carton contains 50 pieces; pair with Trim-Tex 3/8 in. bullnose beads.


Key Features:

  • Faster finishing: Molded corners replace time-consuming cutting and mitering where bullnose beads meet.
  • 3-way design: The 3-way corner configuration handles intersections of multiple bullnose beads.
  • 3/8 in. radius: Sized for 3/8 in. medium bullnose drywall trim.
  • Durable material: Made of durable, resilient high impact polystyrene.
  • Easy install: Designed for easy installation with standard drywall finishing methods.
  • Bulk carton: Ships 50 pieces per carton for larger jobs.

Specifications Table:

Specification Details
Brand Trim-Tex
Manufacturer model 923
Sell unit 1 molded corner (50 pcs/ctn)
Material High impact polystyrene
Color / finish White (molded polystyrene)
Nominal size 3/8 in. medium bullnose, 3-way corner
Pack quantity 50 pcs/ctn
Intended use Finishing drywall corners where multiple 3/8 in. bullnose beads meet
Assembly Install with bullnose bead and joint compound; no mitering required
Manufacturer warranty summary Not stated in available sources

Coverage & How Much You Need:

Each molded corner covers a single 3-way intersection of 3/8 in. bullnose beads. Estimate one corner per three-bead intersection and count your tee, off-angle and bullnose-to-90-degree transitions when sizing a job.

Fit and Compatibility:

Designed for use with Trim-Tex 3/8 in. medium bullnose drywall beads. Bullnose base adapters (sold separately) transition rounded beads to 90-degree corners for baseboard installation.


Frequently Asked Questions (FAQ):

Q: What is included?
A: One molded 3-way corner; the sell unit is a single piece, and the product ships 50 pieces per carton.


Q: What bead size does it fit?
A: It is made for 3/8 in. medium bullnose drywall beads.


Q: What material is it made of?
A: It is a molded high impact polystyrene corner, described by the manufacturer as durable and resilient.


Q: How is it installed?
A: Fit it at the intersection of bullnose beads and finish with joint compound like standard trim accessories; it eliminates mitering.


Q: How do I handle baseboards with bullnose corners?
A: Use Trim-Tex bullnose base adapters, sold separately, which transition rounded beads to 90-degree corners for installing baseboards.


Q: Are there any warnings?
A: California residents: the listing carries a Proposition 65 warning for cancer and reproductive harm.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

Molded 3-way corners are the fastest way to handle off-angle intersections that are tedious to miter in vinyl bullnose trim. Match the corner radius to your bead — this one is for 3/8 in. medium bullnose — and embed it in compound alongside the beads so the finish is seamless. Order by the 50-piece carton if you have multiple rooms of bullnose corners.

Standard SDS guidance for molded polystyrene corners: avoid dust inhalation and eye contact during cutting and sanding, and wear appropriate personal protective equipment.


Order the Trim-Tex 923 3/8 in. bullnose 3-way molded corner for fast, clean drywall corner finishes.

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Subject to Approval & Availability
All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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