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Flat Shims

Price range: $52.08 through $97.66

Versatile 2" × 4" plastic flat shims for leveling, spacing, and alignment. Molded in convenient break-apart sheets, these durable HIPS shims can be used individually or stacked to achieve the required spacing. Available in 1/16", 1/8", and 1/4" thicknesses.

  • Details

    PLASTIC FLAT SHIMS FOR LEVELING & SPACING

    Glazelock Flat Shims provide a simple, durable solution for leveling, spacing, and alignment in construction, glazing, and industrial applications. Each shim provides a broad 2″ × 4″ bearing surface and can be used individually or stacked with additional shims to achieve the required spacing.

    Flat Shims are molded in convenient sheets of 12 and designed to snap apart easily when needed. This keeps the individual shims together for handling and storage while allowing installers to quickly separate the quantity required for the job.

    The solid rectangular design is well suited for precast concrete, tilt-wall construction, curtain walls, glazing, machinery and equipment leveling, furniture, appliances, and other applications where a broad shimming surface is useful.

    For installations involving a bolt or anchor, a hole can also be drilled through the shim, allowing it to fit over the fastener and helping prevent the shim from moving out of position.

    Made from high-impact polystyrene (HIPS), Glazelock Flat Shims will not rot, shrink, or swell like wood. They’re available in three color-coded thicknesses: 1/16″ blue, 1/8″ red, and 1/4″ black.

    Glazelock Flat Shims are made in the USA.

  • Specifications

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  • Shipping

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What our customers say.

  • We have been using Glazelock’s Interlocking shims for over 5 years now. They simply snap together to get our desired thickness. No more taping or glue shims together, saving us time and money.

    – Roger, Starline Architectural Windows Ltd.
  • We at Softer Lite Window Company use the Wedgelock Shim and are pleased with this great product.  My installers find it more efficient and cost-effective, and an easier and faster way to get the job done right-the first time.  We recommend the Wedgelock Shim and all of the Glazelock products.

    -Mark Kane, President, Softer Lite Window Company
  • Glazelock is our go to company for all our shim needs.  We’ve never had any problems with the product received.  The customer service provided goes beyond expectations-we can see our product ordered as soon as the next business day.

    -Lindsey Holmes, B&D Contractors, Inc.
  • I like using Glazeock’s Stackable Shims because they have the ability to stack well and make the right size shims for the job.

    -Jared, EGR Inc.

Why use Glazelock Shims?


  • Invented by a window installer.

  • Easier placement.

  • Reduces material and labor costs.

  • Secure and Stable.

  • Simplifies installation in a multitude of applications.

  • Proudly made in the USA.

  • Multiple sizes and variations available.

Shipping Info


All In-stock orders received by 2pm CST are shipped same day. Products shipped by UPS and/or Common Carrier We will ship Ground/Best way.

If you need an order expedited please give us a call and we can quote you for Next Day Air and Second Day.