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Who is Sun Silicates?

Gerbrand Haasbroek - Group Managing Director

Founded in 2006 by Gerbrand Haasbroek, Sun Silicates (Pty) Ltd is owned and managed by a dynamic team of engineers and chemical specialists. As a self-professed entrepreneur, it had been a lifelong desire of Gerbrand to develop business opportunities and after extensive local and international experience in the metallurgical and chemical industry, he decided to start his first industrial scale venture.

Initially an opportunity was identified for   the manufacture of Potassium Silicates for the welding and agricultural industries.

A furnace was designed and built on a heavy-industrial site in Wadeville, east of Johannesburg and the first Potassium Silicate cullet was manufactured in 2010.

In 2012, a Perlite exfoliation plant was added. Since the technology and the products are complementary, a Vermiculite expansion facility was added in 2014 making Sun Silicates the only company in southern Africa with the capability to manufacture complete range of exfoliated Perlite and Vermiculite products. In 2014,  Gerbrand and his son Dewald also invested in Matutu Milling, an Attapulgite operation that supplies a variety of absorbent minerals. The plant was subsequently expanded and a new drier and milling facility is in the process of being constructed.

In 2017, a new, high capacity blending plant was added to the portfolio. This enables the Sun Silicates group of companies to manufacture sophisticated, pre-blended Perlite- and cement-based plasters and screeds, growing media, insulating and other refractory concretes as well as gunning mixes for fire protection.

01. Combined Experience

We pride ourselves on an inherent culture of engineering excellence and exceptional technical support with highly qualified and experienced engineers and many years of professional experience.

With an emphasis on the needs of our customers, our people are technically astute, flexible and quick to react. Sun Silicates has a centralised management structure ensuring efficient and cost effective overheads Through ongoing innovation, we ensure that our products are world-class and offer excellent value.

02. Security

Sun Silicates is an ISO 9001:2015 certified company ensuring that our products are always consistent. We are also Halaal certified, ensuring both food safety and peace of mind.

03. After Sales Services

We are in regular contact with our customers and pride ourselves on retaining our customer base through competitively-priced, quality products and technical  We live by the motto, ”Our products offer value for money, through and through”.

04. Professionalism

As a professional company, we ensure that we have state of the art finance, human resources, customer relationship, laboratory and quality control systems and procedures in place. Our qualified and experienced staff, including various metallurgical, chemical and mechanical engineers, plays a significant role in the professionalism of our company.

05. Human Resources Priorities

As a proudly South African manufacturing facility, we place particular emphasis on  our Health and Safety and training programmes. We provide in-house and external training, all of which is accredited as we see the growth potential of our employees and future opportunities as a high priority.

Company Overview

sunsilicates logo


Sun Silicates is a manufacturer and distributor of the following product categories:

solusil logo

Solusil Potassium and Sodium Silicate-based products which includes:

  • Potassium silicates for the welding industry
  • Potassium silicate concrete densifiers
  • Sodium silicates (spray dried and liquids)
  • Soluble silica fertilizers – these fertilisers make crops more heat, drought and pest-resistant
  • Industrial minerals
sunperl logo 2

SunPerl is a range of Perlite and Vermiculite products including:

  • Insulation materials for the refractory and building industries
  • Vacuum filter aids for wine, beer, fruit juices and edible oils
  • Growing media for the hydroponics and agricultural industries
  • Fillers for the paint industry
  • Carriers and absorbents
Inmim logo

INMIM offers consulting and project management services to the mining, metallurgical and mechanical/production industries. This includes but is not limited to:

  • Plant design and operations
  • Project management
  • Design and manufacture of specialised equipment
  • Metallurgical consulting to the ore processing and pyro metallurgical industry
Matutu Milling_Logo (1)

Matutu Milling mines, dries, calcines and screens Attapulgite clay into different product grades for use in the following applications:

  • Cat litter
  • Absorbents
  • Chemical carriers dried and calcined grades
  • Desiccants
  • Bleaching earth
  • Binders for granulation
  • Filter aid for oils and jet fuel
Metflux Logo

Metflux is a manufacturer of fluxes for the metallurgical industry. This includes:

  • Distribution of raw materials
  • Milling and screening
  • Toll bagging of raw materials and products
  • Fluxes and coatings for the aluminium and foundry industries
Sun Insulation_Logo (transparent)

Sun Insulation has strong metallurgical core competencies and, with access to the exfoliated Perlite and Vermiculite products produced by Sun Silicates, offers both standard and speciality refractory products.

Sun Insulation recently appointed Dave Thomas, a refractory specialist, as technical manager. With many years of experience in the formulation and development of speciality refractory materials, he further strengthens the group’s technical team. The extensive laboratory facilities of the group allows Sun Insulation to develop, analyse test and quality assure its products.

Some of the products that Sun Insulation will bring to the market include:

  1. Perlite-based insulating castables
  2. Vermiculite-based insulating castables
  3. Basic monolithic castables
  4. Alumina-based monolithic castables
  5. Fire protection screeds
  6. Fire protection castables
  7. Fire protection gunning/shotcrete materials
  8. Insulating plasters
  9. Insulating screeds
CemteQ_Logo (transparent) (1)

CemteQ specialises in developing and marketing unique, value-adding solutions for the building and construction industries. Many of these opportunities are not new to the international building and construction sector but have not been fully explored in the South African or African context. Through our sister company, Sun Silicates, we have access to high quality Perlite production and use this as an aggregate replacement or partial replacement together with cement and special admixtures to produce unique and bespoke solutions for plaster, screeds and concrete applications. The end result is products which have significant insulation, fire-resistance, lightweight and acoustic properties.

Perlite in construction

Perlite is widely used in construction in the middle east, Europe and the USA. It’s low density and relatively low price make it ideal for use in eco-friendly mixtures with cementitious materials. Typical applications include:

  • Lightweight and insulating plasters
  • Insulating screeds on concrete floors or flat roofs
  • Lightweight and insulating concrete
  • Loose fill in cavities for insulation
  • Fireproofing of structural steel columns
  • Lightweight precast cladding
  • Decorative applications

Board Of Directors

Gerbrand Haasbroek

Gerbrand Haasbroek

Group Managing Director

Vanessa Botha

Vanessa Botha

Managing Director of Metflux

Director of Sun Silicates

Andre de Lange

Andre de Lange

Director of Metflux

General Manager of INMIM

Dewald Haasbroek

Dewald Haasbroek

Managing Director of Matutu Milling

The Team

The Sun Silicates and subsidiaries team

Our Lab

Sun Silicates Logo

Sun Silicates (Pty) Ltd focuses on supplying high-tech consumable products to the chemical, metallurgical and agricultural industries. The company is customer and performance focused and we ensure our customers of quality products at competitive pricing.

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