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Advantages and Disadvantages of Using a Soft Rod

April 22, 2020

Backer rods are vital in construction and are often utilized to seal open joints. Some processes require the use of waterproof backer rods while others need flexible filler rods. There are two main types of backer rods used – the closed cell rod and the soft rod. However, most construction applications use the latter. 


What is a Soft Rod?  

It is a rod made of breathable material that lets in air and water. These rods are flexible and are used to fit different gap sizes. This is due to the rod capability to be forced into the gaps within wide joints. 


Soft backer rods are great for indoor applications that do not require airtight and water resistant seals. These rods also form the ideal backing for applying sealants even though they are compatible with air and water. This is because these rods do not bond with the sealant, thereby ensuring that bondings only happen between the building material and the sealant. 



There are several advantages of using this type of rod. One main advantage is how easy it is to install. It's flexibility makes the process of fitting it into gaps faster and smoother, without using a large amount of force. They also bend quickly when taking the shape of the joint to be filled and easily cover gaps, even if they're of varying widths. 



While there are numerous benefits to using soft rods, it also comes with its own disadvantages. A big limitation to these types of rods is that they can't be used in outdoor construction. Since water and moisture can pass through the rod, it is not effective in forming an airtight seal. They can't be used to make well-insulated seals as they're vulnerable to heat. 


These rods can be used in a number of construction applications. However, it does have its limitations. Talk to your contractor or supplier for advice on what is the best backer rod to use.