Dynabolt vs Chemset – What’s the Difference

Dynabolt vs Chemset

Construction work involves a lot of technicalities, and choosing the right materials is crucial for the success of a project. As a builder or developer, you should always be wary of the type of bolts and fixings you use for your work. Dynabolts and chemists are common construction fixings, but do you know the differences between the two? This article will explore and compare these two types of fixings.

What is Dynabolt?

Dynabolt is a heavy-duty fixing used for anchoring into concrete, brickwork and masonry. It consists of an internally threaded expansion shielding bolt with a hexagon head, which you expand using the included nut and washer set. This ‘spreading action’ extends the shield, enabling it to grip tightly against the material being fixed into. Dynabolts are suitable for indoor and outdoor applications as they are rust-resistant and provide high levels of durability, ensuring long-lasting performance.

What is Chemset?

Chemset Metal is an innovative construction product produced by T.L Watson Ltd that combines the strength and stability of steel with the flexibility and durability of polymer resin. It’s a cost-effective solution for many construction projects, as it won’t corrode or fatigue like traditional reinforcement materials. With Chemset metal, you get superior performance in difficult-to-access locations and a wide range of design options for reinforcing structures such as beams, columns, foundations and retaining walls. Its unique composition makes it easier to fasten on site – no drill holes required – making installation much easier than traditional steel reinforcement components.

Difference Between Dynabolt and Chemset

Dynabolt and Chemset are products used to fix or secure objects into concrete, brick, masonry, stone and other base materials. However, Dynabolt is a simple hex head bolt with an expanded plug that screws directly into pre-drilled holes. At the same time, Chemset is a two-part chemical system comprising resin and hardener, which chemically binds to the material it has been applied to. When compared in terms of strength potential – Dynabolt provides consistently reliable performance as its expansion within the substrate results in strong anchoring. At the same time, Chemset offers superior vibration resistance and can hold very heavy loads.

Chemical Composition

The primary difference between Dynabolt and Chemset is their chemical composition. Dynabolt is made from zinc-plated carbon steel, while Chemset is made from stainless steel. This material difference can have a significant impact on the strength of the anchor bolt, as well as its corrosion resistance.

Anchor Size

Another difference between Dynabolt and Chemset is the size of the anchor bolt itself. Dynabolt anchors are available in sizes ranging from M6 to M20, while Chemset anchors are available in sizes ranging from M8 to M24. This means that Chemset anchors are generally larger than Dynabolt anchors, which can benefit applications where a larger anchor is needed for greater strength or stability.

Expansion Mechanism

The expansion mechanism used by each anchor also differs significantly between Dynabolt and Chemset. Dynabolt uses an expansion sleeve, which expands when tightening the nut on the bolt. In contrast, Chemset inserts an expanding plug into a pre-drilled hole in the substrate material. This difference can make installation easier for certain applications, such as concrete walls or ceilings where drilling may not be possible or practical.

Corrosion Resistance

Due to its stainless steel construction, Chemset has superior corrosion resistance compared to Dynabolt’s zinc-plated carbon steel construction. This makes it ideal for outdoor applications or other environments where corrosion could be an issue over time. It should be noted, however, that both products are designed to provide excellent corrosion resistance if installed correctly and maintained properly over time.


Finally, there is also a cost difference between Dynabolt and Chemset anchors. Generally speaking, Chemset anchors are more expensive than Dynabolt anchors due to their higher-quality materials and manufacturing process. However, this cost difference should not be considered too heavily when choosing an anchor, as performance and longevity should always take priority over cost considerations when selecting fasteners for a project.


Dynabolt and Chemset are good options for anchoring steel frames into concrete or masonry. Both are designed to provide secure, reliable connections with high pull-out values and are ideal for applications in the construction of bridges, buildings, workshops, and warehouses. In conclusion, both products offer the ultimate security when working with heavy-duty framing systems.