Slab Bolsters

Slab Bolsters – Consistent Concrete Cover with Metal and Plastic Options

Slab Bolsters are essential supports used to maintain the proper elevation of rebar in slab-on-grade, precast, and cast-in-place concrete applications. Designed to provide uniform spacing and concrete cover, slab bolsters help ensure code-compliant reinforcement placement and structural integrity throughout the slab. At Bolsinger Rebar, we offer a full range of slab bolsters in both metal and plastic configurations to meet the diverse needs of your jobsite.

Metal Slab Bolsters

Our metal slab bolsters feature a continuous upper wire supported by evenly spaced legs made of high-strength steel, providing a stable and durable platform for supporting bottom-layer reinforcement. These bolsters are ideal for traditional cast-in-place applications and are available in plain or epoxy-coated finishes. Plain steel bolsters are a cost-effective option for standard use, while epoxy-coated versions provide corrosion resistance for projects exposed to moisture, deicing chemicals, or other harsh conditions.

Plastic Slab Bolsters

Plastic slab bolsters are a lightweight, non-corrosive alternative to metal supports, ideal for applications where rebar is placed on waterproofing membranes or where metal contact with forms must be avoided. Made from high-strength, load-rated plastic, these bolsters offer excellent stability, won’t rust, and are easy to handle. Their smooth surface also minimizes marring or staining on exposed or decorative concrete.

Upper Slab Bolsters

For double-mat reinforcement or elevated layers of steel, upper slab bolsters (also known as upper deformed bar supports) provide the same dependable spacing and cover but are designed to support top bars over lower reinforcement layers. Available in both metal and plastic, these are critical in elevated slab systems, bridge decks, and precast panels.

Product Benefits:

  • Available in multiple heights to meet required concrete cover
  • Compatible with a variety of slab and formwork types
  • Smooth base options for use on vapor barriers or exposed surfaces
  • Metal options in plain or epoxy-coated finishes
  • Durable plastic options for corrosion resistance and clean placement

Common Applications:

  • Slab-on-grade and elevated slabs
  • Precast concrete beds and panels
  • Bridge decks and structural floors
  • Commercial, industrial, and DOT concrete projects

Bolsinger Rebar provides a complete selection of slab bolster solutions to help you meet project specs, maintain efficient workflows, and ensure high-quality concrete placement. Whether you're working on a large commercial foundation or detailed precast work, our slab bolsters deliver reliable support every time.

Need help choosing the right type or height? Contact our team—we’re ready to assist.

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