Concrete Shims: Precast for Leveling Units, 4 x 6 x 1/4in (90/Box)

Concrete Shims: Precast for Leveling Concrete Units (4 x 6 x 1/4in, 90/Box)

Overview

Precast concrete shims are designed for precise leveling and alignment of concrete units during construction. They help correct uneven foundations and ensure accurate placement of heavy concrete and structural components.

These shims are compact, easy to handle, and ideal for fine adjustments on job sites.

Why Use Precast Concrete Shims

Unlike wood shims, precast shims do not compress, rot, or degrade over time. They are engineered to support heavy loads and maintain consistent thickness under pressure.

Precast shims are commonly used in:

• Concrete unit leveling
• Structural alignment
• Equipment and base installation
• Commercial and residential construction

For added stability, adhesive can be used to secure the shim in place.

Key Features

• High impact polystyrene construction
• 5,000–6,000 PSI bearing capacity
• Won’t rust or stain
• Consistent thickness for accurate leveling
• Suitable for long-term structural support

These features make them a reliable choice for professional contractors and DIY users.

Product Specifications

• Size: 4 x 6 x 1/4 inches
• Quantity: 90 shims per box
• Material: High impact polystyrene

This size is ideal for leveling foundations, precast units, and concrete assemblies.

Installation and Use

Precast shims are easy to install and require minimal tools.

Steps:

1. Select the correct shim thickness based on load requirements.
2. Place the shim between surfaces requiring alignment.
3. Check level accuracy.
4. Secure if necessary using adhesive or fasteners.

They are commonly placed beneath concrete units or between concrete and metal components.

Benefits of Precast Shims

• High load-bearing capacity
• Moisture and corrosion resistance
• Faster installation
• Reduced need for future adjustments
• Long-lasting performance

Compared to wood shims, precast options provide greater stability and durability.

Choosing the Right Shim

Select shims based on:

• Load weight
• Required thickness
• Surface material compatibility

Proper selection ensures accurate alignment and long-term performance.

Related Concrete Accessories

Certified MTP offers a full range of construction shims for different applications, including horseshoe shims, aluminum shims, and leveling shims.

For concrete placement and handling, explore tremie pipes and hoppers and rebar chairs to support strong, durable construction.

Maintenance and Longevity

Precast shims require minimal maintenance. Inspect periodically for damage and store unused shims in a dry area. When properly used, they provide reliable, long-term support for concrete and structural projects.