Action Upholstery Supply

Marine & Outdoor Hard Poly Welt Cord - Waterproof Extruded Plastic Piping

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Condition:
New
Weight:
0.00 LBS
  • Poly Welt
  • Poly Welt
$25.95 - $99.95
Frequently bought together:

Description

Hard poly welt cord is the industry standard for marine, automotive, and outdoor upholstery. Commonly used in boats and outdoor patio furniture. Manufactured from extruded plastic foam, this piping filler is entirely waterproof and non-absorbent, making it the perfect choice for environments exposed to rain, humidity, or salt water. Unlike indoor tissue/paper welt, poly cord will not rot, mold, or break down when wet, ensuring your outdoor projects stand the test of time. Can be used in other applications to replace other welts when a firm welt is needed.

Features and Specifications:

  • 100% Waterproof: Extruded plastic foam prevents moisture absorption.
  • Firm Structure: "Hard" poly construction prevents crushing, offering a highly durable, structured piping edge for heavy-duty vinyl and outdoor acrylic canvases.

Choosing the Right Size:

  • 3/32" & 4/32": Ideal for tight curves, small marine accents, RV valances, and detailed trim work.
  • 5/32": The standard size for most exterior upholstery. Perfect for standard boat seat cushions, helm chairs, and patio furniture.
  • 6/32" & 8/32": Thicker profiles designed for larger marine applications, such as heavy pontoon seating, expansive sunpads, and thick canvas awnings.
  • 10/32": Heavy-duty, oversized piping used for bold decorative edges on large exterior cushions and commercial marine seating.
Item # Size Yardage
WP332 3/32″ 500
WP432 4/32″ 500
WP532 5/32″ 500
WP632 6/32″ 500
WP832 8/32″ 500
WP1032 10/32″ 250
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Additional Information

Shipping Rate:
flat1595
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1 Review

  • 5
    Poly Welt

    Posted by Tnt Canvas on Dec 4th 2025

    Great Product , nicely spooled.

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