Glazelock Plastic Flat Shims for Windows & Doors

Name: Glazelock® Window & Door Flat Plate Shims, Multiple Thicknesses | Multiple Pack Sizes | Made in USA
Brand: Glazelock
SKU: FS01
Price: 103.6 USD
Availability: InStock

Glazelock flat-plate dimension chart showing 4-by-2-inch shims: gray FS01 at 1/4-inch thick, red FS02 at 1/8 inch, and blue FS03 at 1/16 inch.

Various glazelock shims including plastic flat plate, u-shaped, wedge-lock, and pre-scored wood shims in multiple colors

Glazelock application collage showing shims used for tile spacing, window and door installation, cabinetry, and countertop leveling.

Glazelock graphic showing stacked blue, red, and black interlocking shims above a shim assortment and commercial building photo.

Red rectangular plastic shim with made in usa label and american flag emblem from glazelock shims collection

Olive green plastic glazelock shims rectangular flat plate with rounded corners and made in usa sticker for window and door installation

$103.60

Shipping calculated at checkout.

Size —

1/4" 300pc (25 x12)

1/8" 600pc (50x12)

1/16" 480pc (40x12)

In stock, ready to ship
Backordered, shipping soon

Flat plate spacing: Rectangular shims help with compatible leveling and alignment tasks.
Thickness options: Choose the thickness that matches the gap your installation requires.
Color-coded organization: Multiple colors help distinguish thicknesses as you work.
Made in the USA: Durable plastic shims designed by a professional window installer.

Shape and material

Glazelock® flat plate shims have a rectangular profile and durable plastic construction. Multiple colors and thicknesses are offered.

Installation uses

Use for compatible residential or commercial window installation, interior or exterior doors, cabinet alignment and general construction spacing. Keep the appropriate thickness nearby while leveling your installation.

Choose for your project

Check the selected shim’s dimensions and thickness against your installation requirements before ordering. This listing is for rectangular flat plate shims, not slotted horseshoe or tapered wedge shims.

Origin

Made in the USA.

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FAQs

What are Glazelock shims used for? +

Glazelock interlocking plastic shims are used for leveling and aligning windows, doors, frames, and other construction applications. Their interlocking design locks stacked shims together to prevent shifting during and after installation.

What makes Glazelock different from regular shims? +

Glazelock shims feature a patented interlocking design that locks stacked shims together so they won't shift or slide out of position — a common problem with standard plastic or wood shims.

Are Glazelock shims Made in USA? +

Yes. Glazelock shims have been Made in the USA since 1997.

What colors and thicknesses are available? +

Glazelock window and door installation shims are available in multiple colors and thicknesses for precise leveling control across a wide range of professional and DIY applications.

Are these shims color-coded? +

Yes. Glazelock shims are color-coded by thickness for easy identification during installation, saving time on the job site.

Glazelock® Window & Door Flat Plate Shims, Multiple Thicknesses | Multiple Pack Sizes | Made in USA