top of page
Order Online

Order Polystyrene Sheets, Ceilings, Insulation & Void Formers Nationally Online Today!

Explore Our National Polystyrene Products, Prices & Online Specials Below!

Why Bulk Buyers Choose Polystyrene Product Company?

Fast & Reliable

Direct National Distributions

Highest & Most Google Reviews

Trusted By Large Construction Companies

Competitive Prices

Long Track Record

Recent Projects That We Supplied

Screenshot 2023-04-20 113017.png

Cape Town Convention Center Extension Project

PolyVoid - Polystyrene Void Former For Raising Slabs.png

Nelson Mandela Children's Hospital Project


Amazon Head Office Project In CT

PolyVoids - Polystyrene Void Former & Void Filler Blocks

Order structural polystyrene void formers for raising concrete slabs in JHB, CT, Durban, East London & Port Elizabeth.
In stock
Product Details
Brand: PolyVoids
Board Size: 1200mm x 2500mm (Various Thicknesses)
Product Type: Expanded Polystyrene
Availability: Delivered Nationally In South Africa & For Export
Estimated Lead Time: Currently 3 to 7 working days excluding weekends & public holidays
Fire Rating: B1
Applications: Void Formers, Structural Fill & Raised Slabs
Standard Board Width (mm): 1200

Polystyrene Void Formers - For Raising Concrete Floor Slabs

On Special Today!

PolyVoid, Sheets & Blocks are high-performance polystyrene void formers and structural fill, designed to raise concrete slabs and provide exceptional compressive strength.

Made from lightweight and cost-effective polystyrene, PolyVoid Sheets & Blocks are nationally available and provide a reliable solution for a variety of construction applications.

You can simply order online or request a quote from us now!

You can either choose direct delivery to your location / site or to collect your order, after it is cut, directly from our distribution centers in:

Please note that all our online prices Exclude VAT.

Anybody can order our polystyrene nationally online and we have no minimum order quantity.

Our distribution centers are not walk-in shops. We cut and deliver polystyrene from these facilities and you can collect your order from them.

General order lead time is 3 to 7 working days for cutting & delivery, excluding weekends and public holidays. If you need product faster then please call us.

Our online ordering platform deals with local deliveries. If you don't find a delivery option online then you can either select the self-collection option online or call us for a delivery cost. Collecting your polystyrene yourself is pretty easy.

We look forward to assisting you!

Polystyrene Void Formers & Void- Fillers

Fire-Retardant PolyVoid Formers are a super cost-effective way to raise the level of existing concrete slabs.

Often engineers and building contractors need to raise the level of an existing concrete slab, quite considerably, without significantly increasing the design loads (weight) on the existing concrete slab.

In these cases, our PolyVoid Sheets & Blocks, are the perfect product because they are both lightweight and have significant compressive strength allowing them to easily raise the slab and carry the weight of the new reinforced concrete slab that will be cast on top of the void-formers.

In the pictures above, our PolyVoid formers are being used to raise an existing concrete slab by 1m, on the Nelson Mandela Children's Hospital Project in Gauteng. A new concrete slab was then cast on top of the void formers so that the new concrete slab level could tie in with the new building structure.

We specialise in cost-effective bulk polystyrene void-former products so check out our Google service reviews and when you are ready just order your polystyrene void-formers nationally online!

New Concrete Slab Thickness

Once the polystyrene void-formers have been placed a new concrete slab must be cast. The minimum thickness of this new concrete slab needs to be 80mm. It also needs to be a fully reinforced concrete slab.

What size sheets or blocks should you order?

Time and time again we get requests for special block sizes to be cut exactly to fit the area. This is not the cost-effective way to order PolyVoid Formers. The cost-effective way to order PolyVoid Former is to order manageable-sized standard sheets that can then simply be cut by hand on-site and placed on the concrete slab. This way there is very little or no polystyrene wastage making it very cost-effective.

If you need any assistance with projects of this nature we are more than happy to give advice and try and find the most cost-effective solution for you.

What density polystyrene do you need?

Density is very important when raising existing concrete slabs. It is important for a number of reasons:

  • The higher the density the more expensive the product
  • The higher the density, the higher the compressive strength (loading requirement)

Your structural engineer will have to specify the correct density!

As with any structural design, your engineer will have to specify the density of polystyrene, based on their design and the actual design loading requirement specific to the project. The structural engineer will need to base their design on the compressive strength properties of the polystyrene as seen in the table below. We manufacture polystyrene in the following densities.

  • Low Density (X-Grade) - 12 kg/m3
  • Medium Density - 15 kg/m3
  • High Density - 20 kg/m3
  • Highest Density - 24 kg/m3 to 30 kg/m3

Polystyrene Compressive Strength Table:

Here is a properties table for the various polystyrene densities.

Density Compressive Stress Cross-Breaking Strength Safe Working Load
Low Density 60 kPa @ 10% compression 80 kPa 15 kPa @ 1% compression
Medium Density 65 kPa @ 10% compression 100 kPa 17 kPa @ 1% compression
High Density 110 kPa @ 10% compression 150 kPa 45 kPa @ 1% compression
Highest Density 160 kPa @ 10% compression 205 kPa 70 kPa @ 1% compression

Online & Offline Payment Methods

Our Payfast Secure Encrypted Online Payment Gateway allows our customers to pay directly online using any of the following cards or options:

  • Visa Credit Cards & Debit Cards
  • Mastercard Credit Cards & Debit Cards
  • Makro Store Cards
  • Builders Warehouse Store Cards
  • Game Store Cards
  • Cape Union Mart Store Cards
  • CTM Store Cards
  • RCS Store Cards & More
  • Instant Online EFT Payment

Alternatively you can order online and request an invoice for normal EFT payment.

About Polystyrene Product Company (Pty) Ltd

Polystyrene Product Company, established nationally in South Africa in 2016, is a well known & respected bulk national supplier of polystyrene sheets, blocks, insulation, extruded polystyrene ceilings & void-formers in South Africa & for export.

Since 2016, we have supplied polystyrene to over 14000 customers nationally in South Africa, Botswana, Mozambique, Zambia, Zimbabwe & Mauritius. We have also supplied bulk polystyrene to many of the biggest construction projects in South Africa.

We are the #1 National Online Ordering Platform For Bulk Polystyrene In South Africa, making it easier and faster for architects, builders, bulk buyers & the general public to order polystyrene online in SA.

CO. Reg Number: 2016/072709/07

VAT Number: 4220273447

National Sales & Logistics (Johannesburg) 011 678 5626

Cape Town Sales 021 200 5926

Durban Sales 031 940 7056

East London & PE Sales 087 095 3259

Save this product for later

Landmark Bulk Polystyrene Projects Supplied

Since, 2016, we have worked closely with many of South Africa's largest construction companies and supplied polystyrene to several of the landmark polystyrene building projects nationally and to neighboring countries. Some of these include:

Cape Town Convention Center Extension Concrete Roof Insulation Project

1400m2 of 120mm Extra-High Density Concrete Roof Insulation (PolyRoof Insulation) Laid On Top Of Torch-On Waterproofing With Paving Overlay

Polystyrene Insulation - Cape Town Convention Centre / Polyroof
PolyVoid - Structural Fill Blocks

Nelson Mandela Children's Hospital Raised Slab Project 

3000m2 of 50mm Extra-High Density Concrete PolyVoid Fillers To Raise An Existing Concrete Slab By 1m. Extra-High Density Polystyrene Has Incredible Compressive Strength Properties.

About Polystyrene Product Company (Pty) Ltd

About Us

Why Polystyrene Product Company (Pty) Ltd

Established Nationally in 2016

Highest Google Reviewed Supplier

Anybody Can Order Direct

Respected Bulk Suppliers

Suppliers To Many Bulk Buyers

Polystyrene Specialists

Technical Experts

High Quality Products

Direct From Factory

Fast Ordering Platform

Well Known

Competitively Priced


No Minimum Orders

Over 35000 Facebook Followers

Polystyrene Order Lead Times

We Cut Hundreds Of Orders, Nationally In South Africa, Every Day.


We Cut On A First-Come-First-Serve Basis So The Faster You Place Your Order The Faster It Will Get Cut.


For Cutting & Collection

 3 - 5 Working Days, Excl. Weekends

For Cutting, Collection & Delivery

3 – 7 Working Days, Excl. Weekends


We May Also Have Stock On The Floor. You Will Have To Call Us To Make Arrangements

Office Hours: Monday - Friday 8am - 5pm

Online / Offline Payment Options

You Can Order Online & Request An Invoice To Pay Via Normal EFT

You Can Order Online & Pay Via:


  • Visa Credit & Debit Cards

  • Mastercard Credit & Debit Cards

  • Builders Warehouse Store Cards

  • RCS Store Cards

  • Game Store Cards

  • Cape Union Mart Store Cards

  • Makro Store Cards

  • CTM Store Cards & More

  • Instant EFT (Online)

Polystyrene Cutting &  Distribution

All National Client Orders Are Managed Centrally & Not Through Our Regional Factories.


We Cut & Deliver Polystyrene Nationally Directly From Our Cutting Facilities In:


Cape Town


East London

Port Elizabeth


We Cut, Deliver & Offer Collection At These Facilities.


Our Online Ordering Platform Deals With Local Deliveries. Call If You Don't Find A Delivery Option.

Bulk Buyer & Regular Buyer Polystyrene Quotes


Bulk Buyers or Regular Buyers will most likely qualify for bulk discounted rates based on order volumes. Please Explore Our Product Catalogue Above Before you complete our Product Specific Online Quote Forms below.

Our Quote Forms Can Take A Little Time To Load & Display.

Polystyrene Product Company

Your Trusted Specialists In Bulk Polystyrene For Concrete Floor Insulation, Cavity Wall Insulation, Concrete Roof Insulation, Thermal Ceilings & Void-Former Applications

National Sales & Head Office


Unit 8, Lower Ground Level, Commercial City, Tungsten Rd, Strydompark, Randburg, 2194

VAT Number: 4220273447

CO. Reg Number: 2016/072709/07

Main Office Number:

011 678 5626


Main Email:

bottom of page