Being a part of the responsible Mica initiative

Being a part of the responsible Mica initiative

Our heritage and our responsibility

At Elmelin, our history stretches back to 1912, when we began processing mica in Walthamstow, London. From these roots, we’ve grown into a specialist in industrial insulation, providing innovative high-temperature thermal and electrical solutions.

Serving industries as diverse as aerospace, foundry, automotive and domestic appliances, we’ve continuously evolved for more than a century.

Mica has always been at the heart of what we do. It’s a mineral with some remarkable properties: heat resistance, electrical insulation and versatility across countless applications. However, we also know mica’s story isn’t always a positive one. Too often, it comes from regions where poverty drives unsafe working conditions and, in some cases, child labour.

Because of our long history with mica, we feel a responsibility to be part of the solution.

Keep reading to learn more.

 

What is the Responsible Mica Initiative?

We’re proud to support the Responsible Mica Initiative (RMI) and commit to creating a supply chain that’s fair and sustainable.

The RMI is an international coalition of companies and organisations all committed to ensuring that mica is mined and processed in a way that respects people, communities, and the environment. Its work is focused on three pillars:

• Responsible Workplace Standards – promoting safe and fair working conditions.
• Community Empowerment Programs – creating alternatives through education, healthcare and livelihood opportunities.
• Legal and Governance Frameworks – strengthening regulations to protect workers and children in mica regions.

These efforts matter because mica is woven into modern life. It is used in paints, plastics, cosmetics and countless electrical and automotive components. The demand will only grow as industries innovate. If this demand is not matched by responsibility, vulnerable communities will continue to bear the cost.

By supporting the RMI, we are helping to transform the mica industry from the inside, building a supply chain that is fair and transparent.

 

Our Commitments for 2025

We’re not here just to talk about responsibility, we want to show how we’re putting it into action. For 2025, we set out some clear steps to support changes across the mica industry:

Taking a leadership role

We’re proud to be serving on the RMI board, helping shape the initiative’s overall direction. By being part of the decision-making, we can make sure the realities of industrial applications of mica are considered while pushing for stronger, fairer supply chains.

Full traceability through The Madagascar Project

Madagascar is a key source of phlogopite mica, the type we use most in our products. That’s why our involvement in the RMI Madagascar Project is so important. For the first time, it gives us traceability all the way back to the mine. This means we can be confident the mica we use is responsibly sourced, while helping ensure miners and their families are supported.

Supply chain transparency

We are integrating our mica supply chain into Tilkal, a blockchain-based platform that enables end-to-end traceability. This technology ensures that every step, from mine to finished product, is visible and verifiable.

Building on sustainability

Our involvement in RMI is an extension of our wider company vision: to enable net-zero carbon solutions through innovative insulation technologies. Just as we help customers reduce their environmental impact, we are committed to addressing social and ethical challenges in the mica industry.

As an ISO 9001:2015 accredited company, we apply rigorous standards of quality and continuous improvement not just to our products, but also to the way we source and manage raw materials.

 

Looking ahead

Mica miners and their communities depend on the global mica supply chain just as much as industries depend on mica’s unique properties. At Elmelin, we believe the path forward must be one where both thrive. Our work in 2025 and beyond will continue to focus on transparency and positive change.

To find out more about the Responsible Mica Initiative and how we’re making a difference, call us on 020 8520 2248 now.

3 benefits of flexible mica sheet as an insulation solution

3 benefits of flexible mica sheet as an insulation solution

Flexible mica sheet is a versatile material that offers a range of benefits for a variety of applications. The mica, a group of silicate minerals known as sheet silicates because of their formation in distinct layers, are light, relatively soft, and have excellent heat resistance and non-conductive properties. There are 37 different mica minerals, including lepidolite, biotite, phlogopite, and muscovite. At Elmelin, our insulation solutions use mica as a core component, harnessing the physical and chemical properties of mica to provide our solutions with superior insulating qualities.

Mica sheets come in two different mineral types, muscovite and phlogopite, and each of these can come in both rigid and flexible sheets. The purpose of the insulation will determine whether rigid or flexible will be most suitable, whereas the difference between muscovite and phlogopite predominantly comes down to the poorer electrical resistance but greater flexibility of phlogopite. Flexible mica sheets will often be stored and transported in rolls, with ours coming in two different grades, MF SSP (Phlogopite mica) and MF SSM (Muscovite mica).

Sustainably sourced mica and the Responsible Mica Initiative

Sustainably sourced mica and the Responsible Mica Initiative

Mica is a class of silicate minerals that are physically and chemically similar in a layered structure. They possess excellent properties for thermal and electrical resistance, therefore being ideal for high temperature insulation solutions. Mica is mined in over 35 countries, with India and Madagascar being the largest sources, followed by China and Brazil. Mica plays a crucial role in various industries, from cosmetics to electronics. All of our products contain mica, the majority of which is mined in very poor countries by artisanal miners living in very poor conditions. Due to these circumstances, ensuring sustainably sourced mica becomes much more significant.

Why is silicate mineral used as a thermal insulator?

Why is silicate mineral used as a thermal insulator?

To answer why silicate mineral is used as a thermal insulator, we should first take a step back and dive into exactly what silicate minerals are. Silicate minerals are made up of silicate groups, and play major roles in the formation of rocks within the Earth. These minerals are actually the largest class of minerals, making up approximately 90% of the Earth’s crust. Silica, SiO2, is found naturally as the mineral quartz and its polymorphs which allow it to crystallise into different crystalline forms. These different forms represent a wide range of combinations, as various silicate minerals occur as the result of different processes taking place over billions of years. 

The anions in silicate minerals predominantly consist of silicon and oxygen atoms, and these anions are used to determine the major silicate mineral groups. These groups include Nesosilicates, Sorosilicates, Cyclosilicates, Tectosilicates and our focus for this article, Phyllosilicates. Formed by sheets of silicate tetrahedra, phyllosilicates are highly abundant and include the likes of clay minerals, serpentine, chlorite and mica. 

Mica is the key component within many of our high temperature insulation products and solutions at Elmelin. It has a variety of beneficial physical and chemical properties that make it ideal for insulation, and over the years we have continued to develop highly effective mica-based insulation solutions for a range of industrial applications. So, when considering why silicate minerals are used as a thermal insulator, our experience and expertise with mica will be used as a prime example.

Which mica properties make it so ideal for industrial insulation?

Which mica properties make it so ideal for industrial insulation?

Mica is at the core of our range of industrial insulation solutions. Our goal is to improve the safety, performance and lifespan for a range of industrial applications. Mica is a widely-used mineral that is sourced from mining in many countries but predominantly India and Madagascar, using artisanal mining techniques Here we’ll discuss mica basics and essentials, as well as which of its properties make it so ideal for industrial insulation.

Elmelin’s mica insulation solutions for consumer appliances

Elmelin’s mica insulation solutions for consumer appliances

Insulation solutions for consumer appliances are required to ensure their safety and longevity. Many consumer appliances are used regularly and they need to be functioning over a long period of time. Millions of households in the UK will have appliances such as hair dryers and toasters, with many also having convection or fan-assisted heaters. The sheer volume of these appliances mean that there is a demand for insulation providers to offer solutions and high quality insulating materials for these products. 

Elmelin specialise in mica-based insulation, with strong expertise in mica itself, and decades of experience with industrial insulation. With adaptability and innovation at the forefront of our values, we have developed outstanding mica-based insulation products for a variety of industries and purposes. The manufacturing and selling of consumer goods and appliances is a competitive market, and these products require excellent insulation solutions to improve their end-user safety and performance. Products such as hair dryers and toasters are exposed to high voltages and temperatures in their day-to-day operation, so it’s key that the insulation used is efficient but also long-lasting.

3 uses of mica tube for electrical insulation

3 uses of mica tube for electrical insulation

Mica is incredibly versatile, with the potential to be applied to many different products and solutions. From large-scale furnaces, to handheld consumer appliances, mica can be moulded and processed into various shapes and sizes. It is a naturally occurring silica-based mineral and due its unique chemical composition and physical properties, it is often used as an electrical and thermal insulator. Mica’s dielectric and thermal resistance properties make it an excellent choice for industrial insulation, yet it is the smooth surface layers that form the mineral which make it so versatile. The smooth surfaces are formed when mica splits along crystalline planes, which results in perfect basal cleavage. Because of this, the mica is flexible and can be shaped into a variety of products including sheets, rolls and tubes. Here we focus on mica tube insulation, specifically electric insulation. 

The major advantages of mica sheet and roll material properties for industrial insulation

The major advantages of mica sheet and roll material properties for industrial insulation

Mica is a group of minerals that form in multiple tightly packed layers. This two-dimensional sheet structure is the reason for mica being known as silicate sheets. They are found in all three major rock varieties and have certain chemical properties which lends mica to being incredibly useful for industrial insulation. 

Due to the layering of the minerals, mica is suited to being produced as mica papers which can be converted into sheets and flexible roll materials. Two of the key properties of mica rolls and mica sheets is the resistance to high temperatures and its inability to conduct electricity. Mica sheets and rolls use these properties, as well as its chemical resistance and durability, in order to work as a highly efficient insulating and reinforcing agent

Mica can also be rigid or flexible, with flexible being used mainly for furnace insulation and automotive gasket application due to its fantastic electrical resistance under high temperatures. Rigid  mica  sheets  are used for sheathing passive fire protection and dielectric barriers within multiple applications.

There are two types of mica mineral used by Elmelin, Muscovite and Phlogopite. Muscovite mica has a higher dielectric strength, therefore having greater insulating properties, while also being a very poor conductor of electrical currents. Because of this, muscovite is widely recognised as the best mica type for electrical applications and devices. As well as this, muscovite mica can be highly durable and both flexible or rigid depending on resin composition.

Phlogopite mica is similar to muscovite mica; it is more heat resistant than muscovite, and as well a poor electrical conductor and can be manufactured  flexible or rigid depending on use. They are the only two mica minerals that are used commercially, 

Here we discuss the major advantages of mica’s thermal, electrical and physical properties for industrial insulation.

The merits of responsibly sourced mica

The merits of responsibly sourced mica

As a naturally occurring mineral, Mica is a durable material that retains its form when exposed to high temperatures, electrical charges, and light and water. Due to its versatility and thermal resistance, it is used across various industries and in a range of products. In fact, almost every individual will use several products that contain Mica components before leaving the house in the morning.

We have spoken extensively about the properties of Mica, of which there are many! See our previous blog on ‘The Benefits of Mica’.  However, due to the growing demand for Mica across developing countries and increased demands from the electrical and automotive industry, we are concerned that global regulations on mining such material will not mirror the pace of change.