Concrete structures are widely used throughout South Africa in residential, commercial, and industrial construction. From concrete roof slabs and balconies to parking decks and retaining walls, concrete remains one of the most durable building materials available. However, despite its strength, concrete is highly porous and vulnerable to water ingress if not properly protected.
This is one of the main reasons why liquid applied rubber waterproofing for concrete is becoming increasingly popular in South Africa. Property owners, contractors, and architects are looking for waterproofing systems that can withstand harsh environmental conditions while offering long-term durability and flexibility.
With increasing exposure to heavy rainfall, UV radiation, and thermal movement, traditional waterproofing systems often struggle to provide consistent performance. Liquid applied rubber waterproofing systems are now being recognized as a more adaptable and effective solution for protecting concrete structures across South Africa.
South Africa’s climate creates several challenges for concrete structures. Buildings are constantly exposed to environmental conditions that accelerate waterproofing failure and structural deterioration.
Some of the biggest challenges include:
Concrete naturally absorbs water through capillaries and small cracks. Once water enters the structure, it can cause:
Many traditional waterproofing systems fail because they become brittle, crack under movement, or deteriorate under UV exposure. This has increased demand for liquid applied rubber waterproofing for concrete, especially in exposed roof slabs and outdoor concrete surfaces where flexibility and seamless protection are essential.
As more property owners seek long-term solutions rather than temporary repairs, liquid-applied systems continue gaining popularity throughout South Africa.
Liquid applied rubber waterproofing for concrete refers to a waterproofing system that is applied in liquid form and cures into a flexible rubber-like membrane. Unlike traditional sheet membranes, the coating forms a seamless waterproof barrier directly bonded to the concrete surface.
Once cured, the membrane helps prevent water ingress while accommodating structural movement and thermal expansion.
One of the major advantages of liquid applied rubber waterproofing for concrete is that it eliminates joints and overlaps, which are common failure points in many traditional waterproofing systems.
These systems are commonly used on:
According to studies on liquid-applied membranes, seamless polymer-based waterproofing systems provide improved flexibility and durability in exposed environments.
External reference:
https://www.sciencedirect.com/topics/engineering/liquid-applied-membrane
This makes them particularly suitable for South African conditions where environmental stress is a major factor in waterproofing performance.
The demand for liquid applied rubber waterproofing for concrete is increasing rapidly across South Africa because the system addresses several common waterproofing failures experienced with traditional methods.
Concrete structures expand and contract due to changing temperatures. Rigid waterproofing systems often crack under this movement, leading to leaks and recurring repairs.
Liquid rubber membranes remain flexible after curing, allowing them to move with the structure rather than against it.
Traditional systems often rely on joints, seams, or overlaps. Over time, these areas become weak points where water can penetrate.
Liquid-applied systems create a continuous membrane across the concrete surface, significantly reducing the risk of leaks.
South Africa’s intense sunlight can quickly degrade conventional waterproofing systems. Liquid rubber coatings are designed to resist UV exposure, making them highly effective for exposed roof slabs and outdoor concrete areas.
Concrete roofs often contain:
Liquid applied systems can conform easily around these areas, unlike sheet membranes that require complicated detailing.
These performance advantages are major reasons why liquid applied rubber waterproofing for concrete continues growing in popularity across South Africa.
One of the reasons for the growth of liquid applied rubber waterproofing for concrete is its versatility across different types of construction projects.
Concrete roof slabs are constantly exposed to rainfall and UV radiation. Waterproofing systems must remain durable and flexible to prevent leaks.
Balconies often experience standing water and movement due to temperature changes. Liquid rubber systems help prevent water ingress while maintaining flexibility.
Commercial buildings frequently include exposed podium slabs that require long-term waterproof protection.
Parapets are common leak points on concrete structures. Seamless waterproofing systems help seal these vulnerable areas effectively.
Because these systems can bond directly to concrete and adapt to structural movement, they are increasingly used across residential, commercial, and industrial projects in South Africa.
Safeguard Chemicals offers advanced waterproofing systems specifically developed for South African conditions. Their Rubber Pro liquid applied rubber waterproofing systems are designed to provide seamless protection for concrete surfaces exposed to harsh environmental conditions.
A typical Safeguard system may include:
Used around joints, cracks, and movement areas to improve durability and crack-bridging capability.
Safeguard systems are commonly used for:
Unlike rigid systems, liquid applied rubber waterproofing for concrete remains flexible over time, helping reduce cracking and waterproofing failure.
This system-based approach improves long-term waterproofing performance while reducing maintenance requirements.
Traditional waterproofing systems such as torch-on membranes and bitumen coatings are still widely used in South Africa. However, they often experience limitations when applied to exposed concrete structures.
Many traditional systems:
Liquid-applied systems are also more adaptable when repairing existing waterproofing failures.
For projects involving exposed roof slabs or balconies, liquid rubber systems often provide better long-term performance than rigid waterproofing methods.
As South African construction trends shift toward longer-lasting waterproofing solutions, liquid rubber systems continue gaining traction.
Selecting the correct system from the start helps prevent:
As awareness around waterproofing performance continues growing, liquid-applied rubber systems are becoming a preferred solution for protecting concrete structures.
Studies on the performance of liquid-applied membranes have shown that seamless polymer waterproofing systems provide strong flexibility and durability for exposed structures.
External reference: Research on the performance of liquid-applied waterproofing membranes
The demand for liquid applied rubber waterproofing for concrete continues to grow in South Africa because modern construction requires waterproofing systems that can handle harsh environmental conditions and long-term structural movement.
Concrete structures are highly vulnerable to water ingress if not properly protected, especially when exposed to UV radiation and heavy rainfall. Traditional systems often struggle under these conditions, leading to recurring waterproofing failures.
Liquid applied rubber systems provide a seamless, flexible, and durable waterproof barrier that adapts to movement while resisting weather-related deterioration.
For roof slabs, balconies, and exposed concrete structures, these systems offer a more reliable long-term solution for South African conditions. As contractors and property owners continue prioritizing durability and reduced maintenance, liquid-applied waterproofing systems are expected to remain a major growth area in the South African waterproofing industry.
Waterproofing of roofs, basements, etc. shall be laid under appropriate manufacturer guarantees supplemented
by a contractor workmanship guarantee. Waterproofing to flat roofs shall be laid with a minimum fall to outlets of
1:80 and include all outlets, etc.Waterproof of external basment walls shall take into account the definition of dry and wet sides as per SANS 10021: 2006 6.15.2 and 6.1.5.3 and provide one or two layer membrane systems as
appropriate descriptions of sheets or membrane waterproofing shall be deemed to include all labour costs.
Apply Safeguard SG720″ primer to prepared surfaces, followed by two coats of “Safeguard SG280” waterproofing polyurethane and one coat of SG PU440 with SG PU Fabric on horizontal and vertical joints.
Apply Safeguard SG720″ primer to prepared surfaces, followed by two coats of “Safeguard SG280” waterproofing polyurethane and one coat of SG PU450 with SG PU Fabric on horizontal and vertical joints.
Thoroughly clean and prepare the surface, as per Safeguard Method Statement for Surface Preparation.
Apply one coat of Safeguard solvent-based Bitumen Primer to the surface ensuring full coverage without any “ponding” of primer on the surface.
Allow to dry and heat-fuse one layer of Safeguard Euro Gecko 4mm APP single re-inforced Bitumen Membrane to the primed surface, lapping all side walls and dressing into and around outlets and upstands.
Provide 100mm side laps and 150mm end laps to adjoining rolls of membrane, ensuring that laps are properly “bled”.
Suitable performance-related products are acceptable.
5-7 days after application of the Bitumen Membrane, thoroughly clean the surface of the membrane and apply 2 coats of Safeguard Bitumen Aluminium paint to the membrane using a brush, roller or spray.
Equivalent products are acceptable.
Thoroughly clean and prepare the surface, removing all laitance, dust, dirt, grime and grease.
Apply one coat of solvent-based Bitumen Primer to the surface ensuring full coverage without any “ponding” of primer on the surface.
Allow to dry and heat-fuse one layer of 4mm APP single re-inforced Bitumen Membrane to the primed surface, lapping all side walls and dressing into and around outlets and upstands.
Provide 100mm side laps and 150mm end laps to adjoining rolls of membrane, ensuring that laps are properly “bled”.
5-7 days after application of the Bitumen Membrane, thoroughly clean the surface of the membrane and apply 2 coats of Bitumen Aluminium paint to the membrane using a brush, roller or spray
Thoroughly clean and prepare all external walls from foundation to 2 brick courses above finished ground level as per Safeguard Method Statement for Surface Preparation.
Apply one coat of Safeguard SG 720 Primer to the walls by spray, roller or brush and allow to dry.
Apply two coats of Safeguard SG PU 610 by spray, roller or brush. If applying by spray, dilute with 5% MEK. Allow the first coat to dry overnight. A third coat should be applied where “Wet” sites are encountered as per SANS 10021:2006 6.1.5.3
Protect membrane with soft board or dimpled membrane prior to backfill.
Equivalent performance-related products may be supplied.
Thoroughly clean and prepare all external walls from foundation to 2 brick courses above finished ground level, removing all dirt, dust, grime grease and any unnecessary mortar,
Apply one coat of Polyurethane Primer to the walls and allow to dry.
Apply two coats of Polyurethane waterproofing membrane to a DFT of 1-2mm. The membrane should accommodate temperatures from -30? to +90?C and have a minimum elasticity of 600% with a Shore A hardness of 60 or greater and a Tensile strength of 4N/mm? or greater. Allow the first coat to dry overnight. A third coat should be applied where “Wet” sites are encountered as per SANS 10021:2006 6.1.5.3
Protect membrane with soft board or dimpled membrane prior to backfill.
Thoroughly clean shower walls and floor, removing all loose dirt, mortar, grime and grease. Walls should not be plastered.
Apply a coat of Safeguard Latseal Slurry mixed with Bondaid to the walls and floor, embedding a non-woven polypropylene membrane into the slurry at all joints.
Allow to cure overnight and apply a further coat of Safeguard slurry to the entire area.
At the joint with the outlet, an expandable polyurethane sealant should be applied to cover both surfaces. This should be allowed to cure, together with the slurry before application of any tiles/mosaics.
Equivalent products are acceptable.
Thoroughly clean shower walls and floor, removing all loose dirt, mortar, grime and grease. Walls should not be plastered.
Apply a coat of cementitious waterproof slurry mixed with bonding liquid to the walls and floor, embedding a non-woven polypropylene membrane into the slurry at all joints.
Allow to cure overnight and apply a further coat of slurry to the entire area.
At the joint with the outlet, an expandable polyurethane sealant should be applied to cover both surfaces. This should be allowed to cure, together with the slurry before application of any tiles/mosaics.
PRODUCT GUARANTEE
Polyurethane Roofing – SG PU280
Polyurethane Foundation – SG PU610
Joint Sealant – SG Flex20
Bitumen Roofing – 4mm Torch-on membrane
Polyurethane Undertile Showers / Balconies – SG PU610
Cementitious Undertile Showers/Balconies – Latseal Slurry
SG PU 280 Flat Roof
SG PU 610 Garden Roof
SG 4mm Bitumen Roof
SG PU 610 Foundation
SG PU 280 Car parking
Waterproofing of roofs, basements, etc. shall be laid under appropriate manufacturer guarantees supplemented
by a contractor workmanship guarantee. Waterproofing to flat roofs shall be laid with a minimum fall to outlets of
1:80 and include all outlets, etc.Waterproof of external basment walls shall take into account the definition of dry and wet sides as per SANS 10021: 2006 6.15.2 and 6.1.5.3 and provide one or two layer membrane systems as
appropriate descriptions of sheets or membrane waterproofing shall be deemed to include all labour costs.
Apply Safeguard SG720″ primer to prepared surfaces, followed by two coats of “Safeguard SG280” waterproofing
polyurethane and one coat of SG PU440 with SG PU Fabric on horizontal and vertical joints.
Apply Safeguard SG720″ primer to prepared surfaces, followed by two coats of “Safeguard SG280” waterproofing
polyurethane and one coat of SG PU450 with SG PU Fabric on horizontal and vertical joints.
Thoroughly clean and prepare all external walls from foundation to 2 brick courses above finished ground level as per Safeguard Method Statement for Surface Preparation.
Apply one coat of Safeguard SG 720 Primer to the walls by spray, roller or brush and allow to dry.
Apply two coats of Safeguard SG PU 610 by spray, roller or brush. If applying by spray, dilute with 5% MEK. Allow the first coat to dry overnight. A third coat should be applied where “Wet” sites are encountered as per SANS 10021:2006 6.1.5.3
Protect membrane with soft board or dimpled membrane prior to backfill.
Equivalent performance-related products may be supplied.
Thoroughly clean and prepare all external walls from foundation to 2 brick courses above finished ground level, removing all dirt, dust, grime grease and any unnecessary mortar,
Apply one coat of Polyurethane Primer to the walls and allow to dry.
Apply two coats of Polyurethane waterproofing membrane to a DFT of 1-2mm. The membrane should accommodate temperatures from -30? to +90?C and have a minimum elasticity of 600% with a Shore A hardness of 60 or greater and a Tensile strength of 4N/mm? or greater. Allow the first coat to dry overnight. A third coat should be applied where “Wet” sites are encountered as per SANS 10021:2006 6.1.5.3
Protect membrane with soft board or dimpled membrane prior to backfill.
Thoroughly clean and prepare the surface, as per Safeguard Method Statement for Surface Preparation.
Apply one coat of Safeguard solvent-based Bitumen Primer to the surface ensuring full coverage without any “ponding” of primer on the surface.
Allow to dry and heat-fuse one layer of Safeguard Euro Gecko 4mm APP single re-inforced Bitumen Membrane to the primed surface, lapping all side walls and dressing into and around outlets and upstands.
Provide 100mm side laps and 150mm end laps to adjoining rolls of membrane, ensuring that laps are properly “bled”.
Suitable performance-related products are acceptable.
5-7 days after application of the Bitumen Membrane, thoroughly clean the surface of the membrane and apply 2 coats of Safeguard Bitumen Aluminium paint to the membrane using a brush, roller or spray.
Equivalent products are acceptable.
Thoroughly clean and prepare the surface, removing all laitance, dust, dirt, grime and grease.
Apply one coat of solvent-based Bitumen Primer to the surface ensuring full coverage without any “ponding” of primer on the surface.
Allow to dry and heat-fuse one layer of 4mm APP single re-inforced Bitumen Membrane to the primed surface, lapping all side walls and dressing into and around outlets and upstands.
Provide 100mm side laps and 150mm end laps to adjoining rolls of membrane, ensuring that laps are properly “bled”.
5-7 days after application of the Bitumen Membrane, thoroughly clean the surface of the membrane and apply 2 coats of Bitumen Aluminium paint to the membrane using a brush, roller or spray.
Thoroughly clean shower walls and floor, removing all loose dirt, mortar, grime and grease. Walls should not be plastered.
Apply a coat of Safeguard Latseal Slurry mixed with Bondaid to the walls and floor, embedding a non-woven polypropylene membrane into the slurry at all joints.
Allow to cure overnight and apply a further coat of Safeguard slurry to the entire area.
At the joint with the outlet, an expandable polyurethane sealant should be applied to cover both surfaces. This should be allowed to cure, together with the slurry before application of any tiles/mosaics.
Equivalent products are acceptable.
Thoroughly clean shower walls and floor, removing all loose dirt, mortar, grime and grease. Walls should not be plastered.
Apply a coat of cementitious waterproof slurry mixed with bonding liquid to the walls and floor, embedding a non-woven polypropylene membrane into the slurry at all joints.
Allow to cure overnight and apply a further coat of slurry to the entire area.
At the joint with the outlet, an expandable polyurethane sealant should be applied to cover both surfaces. This should be allowed to cure, together with the slurry before application of any tiles/mosaics.
