Concrete Stackable Bolsters for Precast Manufacturing

Polylok® Concrete Stackable Bolsters are an advanced alternative to traditional concrete spacers, designed specifically for the demands of modern precast manufacturing. Engineered for strength, speed, and flawless finishes, these bolsters provide reliable reinforcement support while improving production efficiency and surface quality.

Unlike conventional concrete spacers and concrete bolsters, which can interrupt concrete flow, Polylok® bolsters allow the pour to fully surround and encapsulate the spacer. This eliminates visible spacers in the finished product and reduces the risk of cold spots that can negatively affect adhesion and structural performance. The result is a cleaner surface finish and greater consistency across every precast element.

Stronger, Faster, More Efficient Bolsters

These bolsters are designed with high load capacity to support reinforcement securely during placement and pouring. Their stackable design allows precast manufacturers to quickly achieve multiple cover heights using a single modular system, reducing inventory complexity and setup time on the production line.

Compared to traditional concrete spacers, Polylok® stackable bolsters:

• Install faster with fewer components

• Stack securely without shifting during the pour

• Adapt to multiple cover requirements

• Reduce handling time and labour costs

This efficiency makes them ideal for high-volume precast operations where speed and repeatability are critical.

Invisible Concrete Spacers for Superior Finishes

One of the key advantages of Polylok® Concrete Spacers is invisibility after casting. Because concrete fully flows around the bolster, nothing remains exposed on the surface once cured. This is a major improvement over standard concrete bolsters, which may partially bond and create visible defects or weak interfaces.

For precast manufacturers focused on quality, durability, and aesthetics, these bolsters help deliver a consistently superior finished product—without additional finishing or remedial work.

Designed for Precast Professionals

Polylok® Concrete Stackable Bolsters are trusted worldwide in precast, infrastructure, and engineered concrete applications. They offer a proven solution for manufacturers seeking stronger reinforcement support, faster production cycles, and cleaner results.

👉 Contact us today to discuss your precast requirements or request technical support for your next project.