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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. 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

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

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SunPerl is a range of Perlite and Vermiculite products.


  • Filter aid
  • Growing media
  • Cosntruction grades


  • Micron
  • Super fine
  • Fine
  • Medium
  • Large
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

Sun Silicates also provide the following services:

  • Blending/mixing/bagging
  • Equipment manufacturing

Board Of Directors

Gerbrand Haasbroek

Gerbrand Haasbroek

Group Managing Director

Vanessa Botha

Vanessa Botha

Managing Director of Metflux

Director of Sun Silicates

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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