Waterproof Shower Curb Overlay Kit, PVC Central Flange, Stainless Grate, Adjustable Curbs, HDPE Membrane & Slope Tray

Premium 48"x72" Watertight Shower Curb Kit for Professional Bathroom Installations

Upgrade your bathroom with our 48"x72" Watertight Shower Curb Overlay Kit — designed for lasting performance, effortless drainage, and easy installation. Perfect for homeowners, contractors, and remodelers, this kit ensures a fully waterproof, maintenance-free shower pan system.


Durable & Precisely Engineered Shower Tray

The shower pan slope tray is crafted from high-pressure EPS foam for exceptional strength without extra weight. Its 5° incline from all four sides channels water efficiently toward the 4" PVC central bonding flange, ensuring fast drainage and preventing pooling. The gray waterproof membrane surface enhances mortar adhesion, creating a secure, watertight bond.


Smooth Water Flow with Central Drain System

The 4" stainless steel grate pairs with the included PVC flange and auxiliary drainage device (fits 2-inch pipes) for uninterrupted water flow. The automatic gravity seal keeps debris out, protecting your plumbing from clogs.


Adjustable Shower Curbs for Flexible Installation

Includes two cuttable shower curbs (48" × 4.5" × 6") made of lightweight XPS extruded board, allowing you to trim and fit according to your exact bathroom layout.


Complete Waterproofing with HDPE Membrane

Two rolls of heavy-duty HDPE waterproof membrane are included — one large and one small — for flexible wall and floor coverage. Pre-cut 4 inside and 2 outside corners save you time during installation.


Professional Trowel for Better Adhesion

Unlike other kits, ours includes a stainless steel square-toothed trowel, designed to keep mortar application even and improve bonding between membrane and surfaces.


Effortless Installation – All in One Package

Whether you’re a DIY enthusiast or a professional installer, this kit comes with everything needed to create a watertight shower assembly quickly. Use with unmodified thin-set mortar for best results.

This shower curb kit is ideal for creating a long-lasting, leak-proof, and beautiful bathroom upgrade. Designed for precision, durability, and ease of installation, it’s your complete solution for a professional-quality shower pan system.