20-Pack Polypropylene Load Diffusion Washers for Foam Board

$10.45 $12.21

20-Pack Polypropylene Load Diffusion Washers

Keep your foam board insulation firmly in place with these heavy-duty polypropylene load diffusion washers. Engineered to spread fastener load across a wide surface area, these plastic washers prevent screws and fasteners from pulling through rigid foam insulation boards, keeping panels securely anchored without damage or deformation.

Whether you're working on a construction project, DIY insulation installation, or woodworking application, these washers deliver reliable, long-lasting performance at an excellent value. Each pack contains 20 washers, giving you plenty to complete your project.

Key Features

Material: High-grade polypropylene (PP) plastic — lightweight, durable, and corrosion-resistant
Function: Distributes fastener load to protect and secure rigid foam insulation boards
Thickness: 0.2 mm — slim profile for a flush, unobtrusive fit
Pack Quantity: 20 washers per pack — great value for larger installations
Versatile Use: Suitable for foam board insulation, rigid panel fixing, woodworking, and general construction tasks
No High-Concern Chemicals: Safe to handle and use in residential and commercial settings
Model Number: 504421

What Are Load Diffusion Washers?

Load diffusion washers (also known as insulation washers or stress plates) are wide, flat washers designed to spread the clamping force of a fastener across a broader surface area. This prevents the fastener head from sinking into or tearing through soft materials like foam board insulation, ensuring a secure, stable fix every time.

Common Applications

Fixing rigid foam insulation boards to walls, floors, and ceilings
Securing polystyrene and polyurethane foam panels
General construction and DIY woodworking projects
Lightweight panel and cladding installation

Made in Mainland China.

Frequently Asked Questions

Q: What material are these load diffusion washers made from?

A: These washers are made from polypropylene (PP) plastic — a lightweight, corrosion-resistant material that is durable enough for construction and DIY applications while remaining easy to handle and cut if needed.

Q: What size foam boards are these washers compatible with?

A: These polypropylene washers are designed for general use with rigid foam insulation boards and panels of various thicknesses. Their wide surface area ensures effective load distribution across most standard foam board types used in construction and insulation projects.

Q: How many washers come in one pack?

A: Each pack contains 20 polypropylene load diffusion washers, providing excellent value for both small DIY tasks and larger insulation or construction projects.