A proposed bill in Brazil’s Chamber of Deputies has ignited fierce opposition from the country’s tyre retreading sector, which sees the legislation as an ill-conceived and uninformed attack on an industry that plays a crucial role in the economy and sustainability efforts. The bill seeks to ban the use of retread tyres on buses and trucks operating on state and federal highways, a move that the industry argues is both impractical and detrimental.

Brazil is the world’s second-largest retread market, following only the United States. This achievement has been attributed to the reliability and quality of work carried out by retreaders, which has earned the market’s trust.

In September 2024, a draft bill was introduced in Brazil’s Chamber of Deputies to exercise a ban on the use of retread tyres in buses and trucks operating on state and federal highways. The Brazilian Association of Tyre Retreading (ABR) lashed out at the proposed draft, labelling it as ‘misguided and uninformed’.

Subsequently, ABR President and Federal Senator of Mato Grosso, Margareth Buzetti, told Tyre Trends, “The proposed bill focuses on retread tyres rather than broader factors such as overloading, poor road conditions or inadequate maintenance practices due to sheer misinformation on the part of the person who proposed the project. It is a simplistic and populist proposal that promises to increase road safety by fighting the wrong enemy. Tyres retreaded in Brazil undergo extremely rigorous inspections to ensure that they reach the transport companies safely and reliably.”

“We, as retreaders, meet Inmetro standards that define the technical requirements for tyre retreading, following the standards of excellence practiced in other countries. We are talking about large companies that have strict quality standards. We are in no way inferior to new tyres in terms of safety,” she added.

According to Buzetti, no reputable company would compromise on tyre safety as doing so could lead to financial losses from accidents and endanger lives. She also pointed out that the sector’s ability to generate approximately 300,000 direct and indirect jobs is a testament to the high quality of retreaded products.

Commenting on how the proposed bill might influence public perception about the sustainable practice, she noted, “The way it was proposed is terrible because it gives people the impression that retread tyres in Brazil are of poor quality and are responsible for road accidents. This is absurd misinformation. However, I do not see this issue as something that concerns the general population. Transport companies, which are the largest users of retread tyres, are aware of the reality.”

“Entities linked to both the reform and transportation sectors sent dozens of letters to the Chamber of Deputies against the proposed bill. We will continue this pressure in 2025,” she added.

The association plans to seek out the rapporteur and the author of the bill so that they understand the seriousness of the work carried out by the sector. “The right thing to do would be for the congressman to withdraw the bill he presented and file another one that focuses on combating illegally-made reforms or the poor-quality tyres that are imported from Asia without any control whatsoever. Then they will have our support. Otherwise, we will seek out partner congressmen to wage a real battle within the Chamber against the advancement of this absurd proposal,” contended Buzetti.

IMPLICATIONS OF THE BILL

Buzetti noted that if the proposed bill was implemented, then the implications would be ‘catastrophic’. “If the bill were to become law, the long-term impact on Brazil’s tyre industry would be devastating. Companies are already struggling with the rising cost of raw materials due to increase in the Dollar-Brazilian Real exchange rates. Banning tyre retreading would further cripple the sector, leading to significant financial and operational challenges,” she said.

Currently, tyre retreading saves Brazil BRL 7 billion in transportation costs. If the proposed bill becomes law, which the ABR believes is unlikely and will actively oppose, it would effectively force transportation companies to buy only new tyres overnight, causing a massive rise in costs.

Alluding to the potential impact of this legislation on Brazil’s carbon neutrality and sustainability goals, Buzetti emphasised, “The sector was recently recognised by the Ministry of the Environment as an important asset in the circular economy. This was a milestone that we achieved at great cost, and the government is finally beginning to see our importance for environmental sustainability. I believe that 2025 will be the year in which we will be able to make even more progress on this issue. We cannot ignore the importance for the environment of a sector that retreads 14 million tyres per year.”

While the association can furnish data demonstrating the safety and reliability of Inmerto-certified retread tyres to battle the proposed bill, Buzetti, attacking the project makers, said, “Can the deputy who created the project present data that guarantees that the lack of safety on the roads is caused by retread tyres?”

Commenting on the bill’s impact on small and micro enterprises if implemented, Buzetti said, “Tyre retreading supports 300,000 jobs in Brazil today. It is a well-established market. Banning retreading would be like taking food off the table for thousands of Brazilians who rely on this sector.”

ALTERNATIVE ROUTE

According to Buzetti, the legislative year ended with this bill being presented to the Chamber of Deputies’ Transport and Roads Committee and it did not receive any amendments within the statutory deadline. Now, in February, discussions on the proposal can begin and she highly doubts that it will move forward. As a senator, she will not participate in the votes in the Chamber but will personally go to the committee to talk to all the deputies to demonstrate the quality of tyre retreading in Brazil.

Speaking on the steps that the government should take to address any lingering safety concerns and prevent future proposals like this, in case the bill was withdrawn, Buzetti said, “Inspection of poor-quality tyres entering the country and incentives for tyre retreaders to continue operating within the law is a necessary step. I presented a bill that is currently pending in the Chamber of Deputies that provides tax exemption for tyre retreading companies, as a way of attracting them to formality.”

She also noted, “Instead of banning retread tyres, we could have greater oversight of imported tyres that enter Brazil illegally. We are talking about tyres that are so bad that they don’t even need to be refurbished. These should be a priority for parliamentarians. And, of course, improving road conditions and oversight of the rules that must be followed by transport companies (such as not exceeding the maximum load) are also important steps to increase road safety.”

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Following the 2025 General Assembly, Law Hieling has been elected to the Global Platform for Sustainable Natural Rubber (GPSNR) Executive Committee to represent the Manufacturer category. His 27-year international career at Michelin, encompassing roles in finance, commercial sales, distribution and his current leadership in natural rubber purchasing, provides a profound, ground-level understanding of the global tyre industry.

This extensive background has given him a clear appreciation for the intricate balance between commercial needs and ecological responsibility. He is committed to leveraging this perspective to help drive the collaborative, transparent and equitable solutions that are essential for a genuinely sustainable natural rubber value chain, benefiting both people and the planet.

Hieling said, “I look forward to contributing to the work of the Executive Committee in advancing responsible practices across the natural rubber sector.”

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As the world grapples with the environmental challenges of discarded tyres, IIT Bombay researchers are developing sustainable solutions by repurposing waste rubber into innovative construction materials. Nilesh Wadhwa reports on how their work not only aims to mitigate landfill waste but also offers unique thermal, electrical and structural benefits for future infrastructure.

With over a billion tyres discarded globally each year, the world faces an escalating crisis in managing tyre waste. Beyond the mounds of rubber in landfills, the environmental and health hazards from tyre degradation, microplastics and toxic emissions are profound. However, a team of researchers at the Indian Institute of Technology (IIT) Bombay is charting a sustainable path forward. By transforming waste tyres into innovative construction materials – Rubcrete, which is a form of concrete mixed with shredded waste tyres. This is said to not only provide strength to the material but also make it more environmentally friendly. The idea is to turn an environmental problem into a valuable resource for civil engineering.

In an interaction with Tyre Trends, Prithvendra Singh, a principal researcher at IIT Bombay, explained the motivations behind this ground-breaking research. “The main aim of this research was to address the dual challenge of excessive end-of-life tyre (ELT) accumulation and the unsustainable depletion of natural aggregates due to ever-rising demand in infrastructural development,” he stated.

By converting waste rubber into engineered rubber aggregates (RA) and rubber-plastic blends (RPB), the team seeks to not only reduce landfill dependency but also enhance the sustainability of construction materials.

This pioneering approach is timely. The sheer scale of tyre waste, with millions of tonnes generated annually, has far-reaching consequences. Tyres are durable, non-biodegradable and pose serious fire hazards.

“One of the most overlooked issues is the generation of microplastics and toxic volatile compounds through tyre wear and tear, degradation, weathering or fires. Landfilled rubber fires can take months to extinguish and result in the emission of carcinogenic gases. These pose risks to human health and ecosystems, and their long-term contamination potential – especially via water, soil and air – is often overlooked in conventional waste management frameworks,” emphasised Singh.

FROM LAB TO FIELD

The IIT Bombay team’s research has revealed promising properties in both RA and RPB, which could revolutionise the use of secondary materials in civil engineering.

Singh elaborated on the mechanical characteristics, “RA and RPB exhibit significantly lower stiffness and higher deformability than natural aggregates, which makes them suitable for specific geoenvironmental applications but limits their use under high structural loads.”

While these properties may exclude them from load-bearing infrastructure, they open up opportunities in other areas. “Despite their lower mechanical strength, both materials demonstrate promising insulation characteristics and environmental safety under controlled conditions,” Singh added.

Thermal and electrical insulation capabilities are where these materials truly shine. “Both RA and RPB have superior thermal resistivity compared to standard sand, confirming their suitability for thermal insulation. Electrically, dry RPB shows the lowest conductivity, making it highly suitable for electrical insulation applications. Both materials also act as excellent dielectric materials over a broad frequency range,” Singh explained.

These characteristics make them ideal for construction projects where insulation and resistance to extreme temperatures or electrical fields are critical, such as in utility corridors or specialised building applications.

However, the journey from laboratory research to real-world applications is not without its challenges. “The lower stiffness of RA leads to higher vertical deformation under applied loads, making them less suitable for high-load applications such as base layers of highways,” Singh pointed out.

“However, they are ideal for lightweight fill applications like embankments or drainage layers, where flexibility and energy absorption are more beneficial than stiffness,” he added.

This insight highlights the potential for using RA and RPB in applications where traditional materials fall short, such as in earthquake-prone regions or on unstable soils where flexibility can mitigate damage. The process of creating RA and RPB depends heavily on the methods used to shred and process waste tyres.

SHREDDING METHODS: BALANCING COSTS AND PERFORMANCE

Singh outlined the pros and cons of various shredding technologies. “Ambient shredding is cost-effective but produces rough-surfaced particles, which exhibit better interaction in cement and polymer composites,” he noted. “Cryogenic shredding yields smoother particles with a broader size distribution but poorer bonding characteristics, and the created particles are generally suitable for turf or sports surfaces. Water-jet grinding offers finer control over particle size but comes at high energy and equipment costs.”

Each method results in materials with distinct properties, influencing their performance in construction applications.

Real-world validation is a crucial step in advancing this technology. To this end, IIT Bombay has partnered with GRP India, a leader in rubber recycling.

“We are currently collaborating with GRP to venture into production and field applications of these sustainable aggregates,” Singh revealed. “This partnership provides a foundation for scaling up through industrial-grade shredding, blending and real-world performance validation.”

These collaborations not only bring academic research closer to commercial implementation but also offer a model for future partnerships between academia and industry.

Of course, environmental safety remains a central concern in adopting new construction materials, especially those derived from waste. Leaching of metals and organic contaminants can pose long-term risks if not properly managed.

Singh’s team addressed these concerns through rigorous testing. “ICP-AES analysis showed that heavy metals like Pb and Zn are present in low concentrations, well within permissible limits,” he reported. “Previous studies corroborate that such materials typically stay within permissible toxicity limits under standard conditions. However, long-term leaching behaviour under varied field conditions remains necessary to confirm safety under varying environmental exposures.” This underscores the need for comprehensive testing and monitoring to ensure environmental safety.

THE ROAD AHEAD

Looking forward, IIT Bombay’s research agenda is ambitious. Singh described plans for further experimentation to expand the applications of RA and RPB. “We are currently planning long-term loading-unloading experiments and elevated temperature testing to establish the thermo-mechanical response of RA and RPB under realistic field stresses,” he said. “These experiments aim to address limitations in durability data and expand application potential. Also, future experiments will simulate realistic landfill environments, including interactions with leachate, microbes, humidity and temperature, to understand long-term behaviour.” Such studies will be essential for certifying these materials for broader use in civil engineering.

Could tyre-derived materials eventually replace traditional aggregates in certain applications? Singh is optimistic. “Yes, particularly in non-structural or semi-structural applications such as leachate drainage layers, landfill covers, thermal insulation barriers and lightweight embankments. The lightweight, high porosity and insulation capabilities of the RA and RPB present unique advantages that traditional aggregates cannot provide,” he said.

This vision aligns with global efforts to promote circular economies and reduce reliance on finite natural resources.

Responding to his expectations from the industry, Singh stated that stakeholders need to support the integration of sustainable materials into mainstream construction.

“The message I would like to convey to the academicians, tyre industry stakeholders and policymakers is to embrace innovation through cross-sectoral collaboration. Sustainable solutions like RA and RPB not only offer environmental remediation but also open new markets for green construction materials. With the right policy incentives, certification frameworks and industry support, we can mainstream these materials and accelerate the transition towards a circular, resilient economy,” he said.

IIT Bombay’s work exemplifies how innovative research, when coupled with industry collaboration and policy support, can turn a pressing environmental problem into a sustainable solution. By reimagining waste as a resource, Singh and his team aim to not only address the tyre waste crisis but also lay the groundwork for more resilient and eco-friendly infrastructure in the future.

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Pirelli has confirmed that all five of its new slick tyre compounds will be used during the first three races of the 2026 Formula One season, beginning with Australia, China and Japan.

The Italian tyre supplier said the compound selections for the opening races mirror the approach taken in 2025, with nominations spanning from the hardest to the softest compounds to suit varying circuit demands.

For the season-opening Australian Grand Prix in Melbourne, scheduled for March 6–8, teams will have access to the C3, C4 and C5 compounds. The same combination in 2024 led to a two-stop race strategy using all three tyres. Earlier this year, however, variable weather conditions limited the use of slicks, with intermediate tyres required for much of the race.

At the Chinese Grand Prix in Shanghai, from March 13–16, Pirelli has selected the mid-range compounds: C2, C3 and C4. The 5.451-kilometre circuit, which was fully resurfaced this year, places average lateral and longitudinal loads on the tyres, with greater wear on the left-hand side of the car. Shanghai will again host the first sprint weekend of the season.

Suzuka, which hosts the Japanese Grand Prix from March 27–29, will require the hardest allocation, with C1, C2 and C3 nominated. The circuit is regarded as one of the most demanding on tyres. In 2025, low track temperatures and reduced graining allowed drivers to complete the race with a single pit stop, whereas higher thermal degradation in 2024 required at least two stops.

Drivers will arrive in Melbourne after an extended pre-season testing programme. The first test will take place behind closed doors in Barcelona from January 26–30, marking the first on-track running of the new tyres on 2026-specification cars. Each team will select three days of running during the five-day test. Two further tests will be held in Bahrain, from February 11–13 and February 18–20.

Pirelli said the use of all five slick compounds across the opening races will allow it to assess performance gaps between the tyres under competitive conditions, as well as their resistance to graining and overheating. The data will be used to inform compound selections for the European rounds later in the season.

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Shandong Dawn Polymer Material Co., Ltd has agreed to acquire an 80 per cent stake in Ningbo SK Synthetic Rubber Co., Ltd for RMB515.97m, as the Chinese polymer materials group seeks to extend its elastomer value chain and strengthen its EPDM rubber capabilities.

Dawn Polymer’s board approved the transaction on 10 December 2025. The company will use internal funds to purchase the stake from SK Geo Centric Investment Hong Kong Limited. Upon completion, Ningbo SK Synthetic Rubber will become a controlled subsidiary and be included in Dawn Polymer’s consolidated financial statements.

The acquisition is subject to shareholder approval but does not constitute a related-party transaction or a major asset restructuring under Shenzhen Stock Exchange rules, the company said.

To support stable operations following completion, certain patents, proprietary technologies and trademarks related to Ningbo SK’s products are expected to be transferred to Dawn Polymer by affiliates of the seller, SK Geo Centric Co., Ltd and/or SK Innovation Co., Ltd. The intellectual property transfer, which has not yet been finalised, is capped at RMB 64.7 m based on an assessment as of 30 June 2025.

Founded in 2012, Ningbo SK Synthetic Rubber is based in the Ningbo Petrochemical Economic and Technological Development Zone. It focuses on the production and sale of EPDM rubber, along with related technical services.

As of 30 June 2025, the company reported total assets of RMB783.0m and net assets of RMB343.8m. Revenue for the first half of 2025 was RMB568.5m, according to audited financial statements.

An asset-based valuation placed the company’s net asset value at RMB647.3m, representing an increase of 88.27 per cent over book value, primarily due to the revaluation of fixed and intangible assets.

Dawn Polymer said the acquisition would enhance its integrated “polymerisation–modification–application” industrial chain. EPDM rubber is a key raw material for the company’s dynamic vulcanisation products, and in-house production is expected to reduce reliance on external suppliers and improve supply chain resilience.

The company cautioned that the transaction remains subject to regulatory approvals and integration risks following completion.

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