What is Polyrok?

Polyrok concrete is the latest innovation from Replas, a sustainable recycled plastic aggregate alternative to mineral aggregate in concrete for pathways, kerbs & channels that find a home for the most problematic waste stream, soft plastic. Polyrok consists of about 95% Red Group post-consumer soft plastic waste with about 5% engineered recycled content to ensure maximum performance in concrete. State of the art technology allows Replas to use soft plastics that are recovered from the REDcycle program in Coles and Woolworths with leading packaging brands. Fit for purpose, strong, and durable recyclable concrete from Replas is the new way for councils to be part of the Circular Economy.

This latest innovation from Replas results in a superior product that has benefits over conventional concrete. Specific plastic-to-cement binding technology has been tested to meet Australian Standards, efficiently and effectively replacing conventional mineral aggregate while diverting plastic from landfill. We are challenging every Council in the country to get on board to be part of the solution for their plastic waste.

If each Council in Australia committed to just one kilometre of footpath, 1,900 tonnes of Polyrok (approx. 470 million pieces of soft plastic material) would permanently become part of the communities’ walkways. 

Concrete your future with Polyrok – get in touch.

Polyrok Concrete Plants



: Plastic predominately sourced from post-consumer waste

Main Polymer Constituents

: HDPE, LDPE, there may be traces of CoPP

Polymer Thermal Conductivity Range

: 0.35 to 0.5 Wm-1K-1

Polymer Specific Heat Range

: 1700 to 1900 JK-1Kg-1

Polyrok Geometry

: Specifically tailored to replicate natural aggregate

Target Aggregate size

: 4-6 mm


: 0.4 – 0.5 kg/L

Environmentally Friendly

Replas’ plastic recycling leads to low maintenance products that are designed to last. Recycled plastic is resistant to termites, microorganisms and moisture, and will never split, rot, crack or need painting. Through the REDcycle Program Replas is proud to partner with companies, such as Coles and Woolworths, who have taken responsibility for the plastic waste they create. The soft plastic material collected through the program can be recycled by Replas and turned into products designed for outdoor use within the community.

Replas Environmental Statement

With plastic use on the rise, we need to create a sustainable community that reduces, re-uses and recycles plastics. At Replas, we see waste as a valuable resource, and are part of making this world more sustainable. What is the environmental cost in not being involved in the circular economy? By re-thinking your selection and procurement to recycled plastic products, you become the true recycler. Everyone touches plastic and we must be more accountable and responsible if we are to drive demand for recycled plastic products.