Our Company

Seal Cool Industries (SCI) is a privately owned business, which today is a leading plastic profile manufacturer in Africa. We endeavour to continually produce high-quality products (plastic extrusions and injection moulding) by using the latest product design, manufacturing equipment and processing methods. We offer solutions from conceptualisation stage, prototyping, and tool building to series production.

For the past 25 years, we have strived to become the market leader in polymer solutions in Southern Africa whilst ensuring an environment that is safe for our employees and products that are complete solutions for our customers. Our drive is to offer only products that are environmentally friendly and sustainable.

Quality is our guiding principle. This applies to our products and our support service. We ensure that we respond to the requirements of our customers and develop products with a competitive edge. This is based on our many years of technical expertise in polymer processing.

We see ourselves as a partner for our customers, who can benefit from our expert knowledge and service-oriented team. SCI is an independent and reliable partner for customers in multiple industry segments.

SCI is ISO 9001:2008 certified.

Our History

SCI (Seal Cool Industries) was founded in 1992 for the extrusion and manufacture of flexible PVC refrigerator door seals (“gaskets”) but soon outgrew its origins. The company expanded its manufacturing base and the production capability to include both rigid and flexible extrusions.

In 2001 the firms expansion had become such that the Lorenztville premises were inadequate to meet the required manufacturing capacity requirements so SCI moved into its existing premises in Southdale, Johannesburg. The production capabilities were vertically extended to include polymer material mixing and compounding at the new facility. This gave the company a strong base to expand its product range to cost-effectively include commercial appliances, outdoor construction, plumbing, sanitary ware and the flooring products. Throughout these periods of expansion, SCI retained many of its original customers illustrating the ability to form strong business relationships with customers.

Today SCI remains a South African-based polymer processor that supplies a diverse range of customers throughout the African continent and special export markets. The focus of the company still remains true to its founding focus namely plastic extrusion and plastic injection moulding. Our core values are innovation, independence, flexibility of supply, quality products and personal service.

SCI is a global supplier that offers its customers:


SCI encourages working with Non-Disclosure Agreements, as this helps protect both parties. If you have invested your time and money on developing a new product, you want to be reassured that all rights remain yours, and this is what we are here for. It is in our interests to build on our excellent reputation.


Everything we do can be traced back to source.


If you need a plastic profile, we simply lift your tool from our shelving, insert it into one of our machines, and we are in production. There is no need to wait for sea or air freight with the associated customs and excise duties plus added stress. Our products are locally manufactured, ensuring that the carbon footprint of your product is minimised and your local content is guaranteed.

Consultative Approach

We want to work with companies who want to develop the very best quality products. We will liaise with you through every step of the process.

The Personal Touch

Communication – this is vital at every stage. We are a team of enthusiastic professionals who want to provide a seamless service from start to finish. We want to become a true partner for your business, not simply a supplier.


We view our customer relationships as a long-term partnerships. Many of our customers have been with us for decades already making us the leading local plastic extrusion manufacturer..


We take pride in our products and strive to maintain our reputation as the foremost profile-extrusion company in Southern Africa.

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MKT Edgeband

Edgeband for woodworking from 0,4mm to 4mm thickness. Made in Germany. www.mkt-gmbh.com.


From YT trunking to NBT4 & CLT, SCI has standard product on shelf and in stock.


The benchmark in PVC Powerskirting in SA. Available in single and double duct. Exclusively distributed by Cabstrut.


Safety curtains for refrigeration, welding or mining, Clearview opens the way.


Compounding and materials handling competence centre, for the processing of PVC, from dryblend production to pelletization.


Manufactured for decades, Aqua Waterstop is the ultimate waterstop with no equal.



Regardless of the material requirement, SCI’s expertise allows us to manufacture rigid extrusions using our state-of-the-art facility unique to Southern Africa. Our factory the largest of its type in Southern Africa incorporates the best of European technology and includes conical twin-screw extruders, parallel twin-screw extruders and single-screw extruders, allowing SCI to shape a multitude of rigid polymers to meet every customer requirement for plastic extrusion..

Our unique solutions include UV and weather resistance, flame retardation, strength enhancement, weight optimisation, anti-static, fungal and mildew resistance, Colour matching as well as texturising and embossing. Our specific expertise extends to precision profile extrusion with vacuum calibration for dimensional control.


With its origins in flexible extrusion, SCI is able to offer clients a multitude of products with specific shore hardness to suit their individual requirements. Our flexible extrusion Factory utilises state-of-the-art single-screw extruders.

Our flexible extrusion focuses (but not exclusively) on PVC extrusion, which is a commodity material for general-purpose usage and low-demanding technical applications.

These profiles can be very soft or very hard, coloured and modified to enhance the technical characteristics for certain applications.


SCI manufactures top quality, injection-moulded products for a wide range of industries and applications. We work with an array of standard, engineered, and custom materials to meet customer requirements for durability and performance. Injection moulding is second nature at SCI.

SCI offers a full range of plastic-injection moulding services from design, (including mould flow, prototyping and mould making) through to final production. Our facility is geared for large-scale series production in diverse materials such as PVC, ABS, PP and nylon.


SCI has the technical expertise and the manufacturing capability to produce consistently high-quality materials as well as technically challenging grades tailored to meet specific high end applications.

We are at the forefront of PVC-compounding technology. Our compounding, materials and handling competence centre allows us to supply products such as rigid extrusion dry-blends and flexible extrusion pelletised materials. Our customised solutions include products that are Phthalate Free and RoHS and REACH compliant.


SCI offers on-request fabrication services for volume production, whether it be an in-line service such as punching, embossing and texturing or off-line services such as mitre cutting, routing etc.


Whether it is a special export stillage or product packed in sleeving, cartons or bobbins, SCI offers its customers solutions that suit their requirements and pockets.


We pride ourselves on our exceptional service and offer products of the highest quality. Our business comprises the following business units.


SCI has a longstanding reputation of supplying the refrigeration sector with custom products or off-the-shelf plastic profiles. From components for glass sliding and hinge doors to bumper profiles, gaskets, seals, thermal breaks and drip trays, our products enable customers to reduce their carbon footprints and remain at the forefront of energy efficiency and international compliance.


SCI has a history of supplying the woodworking industries with various products. Today this range includes bumper profiles, T-mouldings, edgings and rollershutter profile many of which are stock items that are available ex-warehouse with short delivery times. SCI offer not only PVC solutions but also ABS products.

Industrial Applications

From mouldings and profiles for the mining industry, or even specialised profiles (hydroponics), hoses and tubings for agriculture and commercial projects. SCI has the competency and capability to assist our partners. We help them realise their projects from concept phase to prototyping and ultimately to full commercialisation.


From components for scaffolding to shuttering, SCI has serviced the greater construction industry for decades. We solve problems for our clients where other non-polymer materials and processes fail. Our projects include underfloor heating components, low cost housing panels and drift eliminators for the largest power station in South Africa’s cooling towers.


For plumbing to flooring, SCI supplies leading African brands with components that enable them to maintain their market positioning. Fixtures, pipes and extrusions… the possibilities are limitless.


We sell a vast range of cable management solutions, from powerskirting to electrical trunking and conduit. A full range of products enables the large-scale electrical wholesaler to source polymer product range from one hand ex stock. SCI currently possesses the largest range of tooling from YT to CLT complete with the most popular accessories. SCI’s Platinum Powerskirting has been designed and developed to meet the demands of African markets. Its stylish European design allows for quiet unobtrusive aesthetics, fast, easy installation, the ability to comply with the latest standards and regulations.


The product development process refers to a system of defined steps and tasks whereby SCI can assist customers to convert ideas into series production.

Product design is the efficient and effective generation and development of ideas through a process that leads to new products. The SCI technical team is focused on understanding customers’ ideas and requirements and utilising its own expertise and experience to find satisfactory cost effective solutions culminating in full commercialisation.

Our team of design and technical engineers has over 25 years of experience with an array of profile extrusions. SCI has a fully integrated computer-aided design system that enables us to offer customers a class-leading plastic-extrusion and injection-moulding design service.


PVC is a linear or branched polymer with little or no cross-linking. It is a thermoplastic material, which flows easily when heated and can be moulded into a variety of shapes.

PVC comes in two basic forms: rigid (sometimes abbreviated as RPVC) and flexible. The rigid form of PVC is used in construction for pipe and in profile applications such as doors and windows. It can be made softer and more flexible by the addition of plasticisers, the most widely used being phthalates.

In this form, it is also used in plumbing, electrical cable insulation, imitation leather, signage, inflatable products, and many applications where it replaces rubber.

ABS plastics are used largely for mechanical purposes due to its impact resistance and toughness. ABS's light weight and ability to be injection moulded and extruded make it useful in manufacturing products such as automotive trim components, automotive bumpers, enclosures for electrical and electronic assemblies, joinery panels, and small kitchen appliances. Household and consumer goods are the major applications of ABS.

Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. Polycarbonate is a durable material. Although it has high impact-resistance, it has low scratch-resistance. They are easily worked, moulded, and thermoformed. Because of these properties, polycarbonates find many applications.

Nylon 6 fibres are tough, possessing high tensile strength, as well as elasticity and lustre. They are wrinkleproof and highly resistant to abrasion and chemicals such as acids and alkalis. The fibres can absorb up to 2.4% of water, although this lowers tensile strength. is widely used for gears, fittings and bearings, in automotive industry for under-the-hood parts, and as a material for power tools housings.

HDPE is known for its large strength-to-density ratio. It is used in a variety of applications, ranging from fuel tanks in motor vehicles, bottle tanks and water pipes.

LDPE has weaker intermolecular forces than HDPE, its tensile strength is also lower, but its resilience is higher. LDPE is widely used for manufacturing various containers, dispensing bottles, wash bottles, tubing, plastic bags for computer components, and various moulded laboratory equipment.

PP is rugged and unusually resistant to many chemical solvents, bases and acids. Polypropylene is normally tough and flexible. This allows PP to be used as an engineering plastic, competing with materials such as acrylonitrile butadiene styrene (ABS). Polypropylene is reasonably economical.

Polypropylene is most commonly used for plastic mouldings but also medical or laboratory equipment can be made from polypropylene because it withstands the heat in an autoclave. Its heat resistance also enables it to be used as the manufacturing material of consumer-grade kettles.

Barium ferrite (BaFe) is a highly magnetic material, with a high packing density, and is a metal oxide. It has found popularity recently with its use in fridge magnets etc.


The advanced tool room includes two flagship Agie Charmiles wire cutters which enable SCI to wire cut complex geometries with tight tolerances and fine surfaces finishes. SCI only uses high-grade German steel, ensuring all tools manufactured have a maximum lifespan and the highest quality and dimensional consistency.

Our experience, combined with continuous research, development and investment, means that SCI is at the forefront of tooling for custom extrusions profiles. Art and science are thoroughly intermixed at SCI and our team of designers, manufacturing engineers and tool and die makers work in close consultation as part of a manufacturing engineering team.

SCIs is part of an international network that allows the customer to access specialised tooling from Europe as well as the Far East.


SCI’s service starts with design and tooling but does not end there. Quality first-off samples during the commissioning process is part of the product development cycle. SCI has a proud heritage of commissioning tooling with industry leading standards ensuring customer satisfaction.


SCI has an enviable reputation for short lead-times and a Flexible Manufacturing System (FMS) to support customer requirements. FMS is a manufacturing system in which there is some flexibility that allows the system to react to changes, whether predicted or unpredicted. Machine flexibility enables SCI’s production system to be changed to produce new product types, and it has the ability to change the order of operations executed on a part. Routing flexibility enables SCI to use multiple machines to perform the same operation on a part, as well as the system's ability to absorb large-scale changes, such as in volume, capacity, or capability.

The main advantages of SCI’s FMS is its high flexibility in managing resources such as time and effort to manufacture a new product.

Customised solutions such as specialised packaging, labelling and certificates of compliance can be provided upon customer request.


Whether the customers' requirement is for a JIT (Just-in-Time) service with an EDI (Electronic Data Interchange) interface, or simply for a specialised courier service for an emergency delivery, the SCI team supports every request. SCI is the Plastic Extrusion Manufacturer.


Call Us
+27 11 433 2188
27 3rd Street Southdale Ext 2
South Africa
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