Armacell offers the most extensive collection of backup (backer rod) materials and the largest range of sizes on the market. Armacell backer rods are available in spools in ¼” to 1 ¼” diameters or 6’ lengths for sizes over 1 ½” diameter. Along with our extensive selection of caulking dispenser guns, CS2 offers everything you need for a wide range of window and door applications.
FillPro Standard Backer Rod
FillPro Standard Backer Rod
FillPro® Standard Backer Rod (formerly ITP Standard) is an extruded round, closed-cell, low density polyethylene foam material with a skin-like outer texture. Standard backer rods are non-absorbent, moisture resistant, flexible and compressible allowing for easy installation in joints as a backup material for sealants.
FillPro Soft Type Backer Rod
FillPro Soft Type Backer Rod
FillPro® Soft Type Backer Rod (formerly ITP Soft Type) is a pliable bi-cellular, open cell core with closed cell skin, polyethylene foam material used for filling irregular joints. It is chemically inert and will resist oil, gasoline and most other solvents. The material will not stain, or adhere to sealant materials and will not out-gas..
FillPro Open Cell Backer Rod (formerly Tundra Foam)
FillPro Open Cell Backer Rod (formerly Tundra Foam)
FillPro® Open Cell Backer Rod (formerly Tundra Foam) is a pliable open-cell polyurethane foam material used for filling irregular joints. It is chemically inert and will resist oil, gasoline and most other solvents. The material will not stain, or adversely adhere to sealant or caulking materials.
FillPro Hot Rod XL Backer Rod
FillPro Hot Rod XL Backer Rod
FillPro® Hot Rod XL Backer Rod (formerly ITP Hot Rod XL) is an extruded round, closed-cell, low-density polyethylene foam material which has been specially crosslinked to withstand temperatures in excess of 400°F (204°C).This material is ideal for hot rubber sealant applications. It is chemically inert and will resist oil, gasoline and most other solvents. The material will not stain, absorb moisture, nor adhere to sealant materials and is non-exuding.
Armacell FillPro® Backer Rods: Built for Real-World Performance
In joint design, small choices have a big impact. Backer rod supports the sealant, shapes the bead, and helps prevent adhesion where you don’t want it. Done right, it adds years to the life of a joint. That’s why CS2 stocks a full range of Armacell FillPro® backer rods, tailored to the realities of the jobsite.
FillPro® Standard Backer Rod
This closed-cell foam does exactly what you need it to. It blocks moisture, maintains shape under pressure, and provides a reliable bond-breaker for cold-applied sealants. The outer skin keeps water out, while the low-density core stays flexible enough to install quickly, even in tight or overhead joints.
FillPro® Soft Type Backer Rod
Joints aren’t always consistent. For areas that are uneven, narrow, or a little out-of-spec, Soft Type fills the gap—literally and figuratively. The bi-cellular design slides in without tearing and stays put without pushing back. Installers like it because it handles easily. Project managers like it because it performs under varied conditions without causing delays.
FillPro® Open Cell Backer Rod
If you’re dealing with a dynamic joint that moves regularly, you need something that stays stable under stress. Open Cell is breathable, which helps with sealant cure in deep or recessed areas. It also compresses without rebounding, so sealant stays where it should. A practical choice for high-movement applications.
FillPro® Hot Rod XL Backer Rod
High-temperature work needs more than just durability. It needs material that doesn’t break down when the heat’s on. Hot Rod XL is engineered to handle hot-pour sealants up to 400°F. It keeps its shape, won’t melt, and installs without the mess that standard foam rods can’t avoid under extreme conditions.
All FillPro® options are non-staining, solvent-resistant, and designed to work with a wide variety of sealant types. Sizes range from ¼” to 6″, with both spool and cut lengths available depending on your needs.
As an authorized Armacell supplier in Canada, CS2 offers more than just access to top-tier products. We help you match the right backer rod to the demands of your project
Why Choose CS2 Construction Sales Inc.?
With decades of industry experience, CS2 has earned a strong reputation as a reliable partner for contractors, architects, and project managers across Canada. We don’t just carry products—we understand them. Our team is trained to help you navigate specs, performance standards, and installation methods so you can make the right choice the first time.
Our direct relationships with manufacturers like Armacell ensure that we stock genuine,
high-performance products, including FillPro® backer rods in a wide range of sizes and types. Whether you need closed-cell, open-cell, or high-temperature materials, we provide guidance based on your job requirements, environmental factors, and joint design.
We also know that construction timelines are tight. That’s why we keep high-demand items like Armacell backer rods readily available at our Toronto warehouse for quick delivery anywhere in Canada. Bulk orders, recurring shipments, and specialty sizing? We can handle that too.
CS2 goes beyond basic order fulfillment. We aim to support your success from start to finish by offering helpful resources, responsive service, and dependable stock. Whether you’re working on a high-rise development or a municipal infrastructure project, we make it easier to get the materials you need—on time and on spec.
From quality cutting solutions, such as Olfa cutting tools, to Armacell products, Dow Chemical silicones, and much more, CS2 provides the tools and materials that meet the highest industry standards.When you choose CS2, you’re partnering with a distributor that understands the demands of the jobsite and works to meet them every day.