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Glazelock Shims

Engineered with the installer in mind

Wood Shims 2

Glazelock Shims Inc. has been a manufacturer of structural plastic shims since 1997. We pride ourselves with quality products, quick turn around time, and great customer service.

All of our products are proudly made in the USA.

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Our product line 
includes our patented Interlocking shims. These shims were invented by the owner, a window installer, to simplify the use of multiple shims in an application. Along with the Interlocking shims we offer multiple different size horseshoe shims, stackable shims and wedge-lock shims.

To date our product line includes six (6) interlocking shim sizes.

Featured Categories

Wood Shims

Wood Shim Packs

Interlocking Shims



Traditional wood shim products have long been used in the building industry and present a variety of limitations - rotting, shrinking and swelling as well as others. Invented by a window installer to simplify the use of Multiple shim applications in window installations, Glazelock Shims reduce material and labor costs and provide a secure and stable solution to your shimming needs.

While these shims were originally made for window and door installations, they also have many more advantages and uses such as:

  • Patent no. 5-640-813
  • Standard black, red and blue colors

Non-Interlocking Shims

Non-interlocking shims just like our interlocking shims, these shims can be used in windows, storefront doors, curtain walls and many other applications. The only thing different about these shims are that they do not have clips, so they do not interlock.

These non-interlocking shims come in a variety of sizes including economy packages.

NEW Tapered Shim


Our new cost effective shim has its own unique gripping system.  It breaks off clean and can easily be nailed through.

  • Made of Recycled Pastic
  • Resists Splitting
  • Waterproof
  • No Rotting
  • Size:  1-1/2"x7-3/4"

Stackable Shims

These shims will simplify the use of multiple shims in window installations. Snap off the individual shims and get the size you need for the job - Made of high Impact polystyrene. 63 shimstacks 1008 shims per case.

Our stackable shims are available in both long and short stackables.

Price breaks when ordering larger quantities.

Wedgelock Shims

Wedgelock Shims

 "Wedge-Lock shims" by Glazelock, Inc.  Designed to maintain alignment, our wedge shims won't shift or separate when stacked. Manufactured from high impact polystyrene for maximum durability.

  • Snaps off clean
  • Made out of Black Polystyrene Plastic
  • Size: 1-1/2" wide x 8" long x 5/16" thick
  • Packaged: 1 case of 288 shims

Whether shimming cabinets, floors or windows, the WEDGE-LOCK's unique locking system will optimize any job when placed together.  Useful as wedges, shims or spacers in numerous construction, residential and industrial applications.

We also manufacture custom shims!

Ask us about our custom shims manufactured to your specifications. Glazelock shims are designed with the installer in mind.

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