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Penetrating water repellent – preventing mould and algae growth

algae growth resistance on concrete slab and PWR - Waterstop Solutions

Penetrating water repellent – preventing mould and algae growth

Enhance your propertyโ€™s curb appeal and protect your investment for years to come

Have you got mould or slippery green algae growing on your concrete, bricks or blockwork?
If you are looking for a solution that will help prevent ๐—ฎ๐—น๐—ด๐—ฎ๐—ฒ, ๐—บ๐—ผ๐˜‚๐—น๐—ฑ, ๐—บ๐—ถ๐—น๐—ฑ๐—ฒ๐˜„, ๐—ฎ๐—ป๐—ฑ ๐—ณ๐˜‚๐—ป๐—ด๐˜‚๐˜€ from returning and getting stuck in the pores of your concrete or masonry, we have the perfect, almost invisible โ€œdry-lookโ€ solution for you.
The easy-to-apply Penetrating Water Repellent ๐—ช๐—ฎ๐˜๐—ฒ๐—ฟ๐˜€๐˜๐—ผ๐—ฝ ๐—ฆ๐—ผ๐—น๐˜‚๐˜๐—ถ๐—ผ๐—ป๐˜€’ ๐—ฃ๐—ช๐—ฅ ๐Ÿญ๐Ÿด๐Ÿฌ+ is a very cost-effective solution for protecting your concrete. It is a low viscosity, silane-siloxane system that lines the pores of new and old cleaned concrete and masonry. The sealer penetrates deep into the porous substrate, creating a bonded hydrophobic lining to the pores.

Waterstop Solutions Penetrating Waterproofing Repellent (PWR) can be used on any porous substrate without changing its appearance, offering a dry-look finish. The PWR penetrates porous surfaces and chemically bonds directly with the substrate which results in a surface that is highly resistant to the attacks of both moisture and salt (and more) but still allows the passage of water vapour. The solution does not produce any discolouration of the substrate. It has a dry-look finish and has excellent resistance to weathering making it highly suitable for many substrates including footpaths and traffic-bearing surfaces, bricks, concrete, masonry blocks, pavers, non-glazed tiles, grout, stucco and some natural stones.

With water beads - Penetrating Water Repellent PWR close up photo of Waterstop Solutions logo on concrete slab

Image: Water beading on PWR treated concrete slab.

The penetrating water repellent makes concrete and masonry less porous by creating a bonded hydrophobic lining to the pores. This means that the treated surface will repel water and resist staining from leaves, oil leaks and grease as well as protect against waterborne salts, yet allows water vapour to escape so the substrate can โ€œbreatheโ€. ๐—œ๐˜ ๐—ฎ๐—น๐˜€๐—ผ ๐—ฑ๐—ผ๐—ฒ๐˜€ ๐—ฎ๐—ป ๐—ฒ๐˜…๐—ฐ๐—ฒ๐—น๐—น๐—ฒ๐—ป๐˜ ๐—ท๐—ผ๐—ฏ ๐—ผ๐—ณ ๐—ฟ๐—ฒ๐˜€๐—ถ๐˜€๐˜๐—ถ๐—ป๐—ด ๐—ฎ๐—น๐—ด๐—ฎ๐—ฒ, ๐—บ๐—ผ๐˜‚๐—น๐—ฑ, ๐—บ๐—ถ๐—น๐—ฑ๐—ฒ๐˜„, ๐—ฎ๐—ป๐—ฑ ๐—ณ๐˜‚๐—ป๐—ด๐˜‚๐˜€. (Please note that a spill left to sit, can eventually stain the surface.)

Waterstop Solutions PWR is a fast-drying, low viscosity, silane-siloxane, breathable water repellent system which penetrates deeply into porous substrates to allow for a bonded hydrophobic lining to the pores. It prevents rising damp through capillary action in concrete, masonry, brickwork, tiles and stonework structures.


1. Concrete
2. Brickwork, masonry blocks
3. Tiles and grout
4. Pool surrounds
5. Some natural stones
6. Traditional and modern stucco and render
7. Paths and traffic-bearing surfaces


  • Provides an invisible water-repellent surface. Maintains the texture and colour of the surface treated. Invisible, dry and natural look finish.
  • Allows the passage of water vapour.
  • Excellent water repellent of concrete, concrete blocks, brickwork, pavers, tiles, tile grout and some natural stones.
  • Long-lasting barrier against efflorescence and surface salts, moisture and chemical attacks.
  • Prevention of dirt retention and deep stains.
  • Reduces cleaning costs. No more scrubbing or power washing. The PWR sealant decreases dirt adhesion and prevents moss and mould growth. (Rainfall or a light garden hose wash is enough.)
  • Reduction of sandstone decay due to attack by salts and low pH precipitation.
  • Elimination of white salt spotting on brickwork.
  • Treatment of rising and salt damp.
  • It acts as a replacement for a damp-proof course (DPC).
  • Helps maintain a great curb appeal and sale value with a new-look preservation.





Cleaning and sealing tips for concrete – Tips on how to clean concrete without a pressure washer:


Outdoor spaces โ€“ Revive And Seal Your Concrete


Give us a call to discuss the best protective treatment application for your vertical and horizontal surfaces to help you choose the appropriate product and methods to protect them and how to best prepare the surface before installation for best performance.

If you have any issues with water ingress, rooftop leaks, leaking balcony, leaking basement, cracking concrete slabs, structural cracks, concrete deterioration, spalling concrete, concrete cancer, deteriorated joints, moisture, seepage, efflorescence, rising damp and/or high-flow active leaks in concrete structures, we would be happy to assist you. You are welcome to contact us with any questions that you may have.


Brisbane office: (07) 3205 1899ย  ย 


Sydney office: (02) 9346 8308ย  ย 

Email:ย [email protected]


Are you interested in finding out more about the various remedial building services we are providing?

Please click on the image below to download Waterstop Solutions Capability Statement

Waterstop Solutions Capability Statement

Waterstop Solutions Capability Statement is now available to download as PDF.ย (The image is clickable and opens up a link to our Capability Statement).ย 




Goodย maintenanceย begins with aย proactiveย approach to maintain, keep, preserve and protect a building.ย 

Remember that seepage/water ingress into areas such as balconies, basements, concrete roofs, car parks and retaining walls, should not be ignored โ€“ call a remedial waterproofing professional today for an assessment to provide you with the best solution for your situation.

At Waterstop Solutions, we carry out a wide range of remedial works to concrete structures post-construction stage in Brisbane, Gold Coast, Sunshine Coast, Sydney and outlying areas in Queensland and New South Wales.

Equipped with major civil works experience, we can quickly determine the best approach to rectify all seepage and concrete deterioration issues.


It takes licenced remedial waterproofer and leak sealing experts like us at Waterstop Solutions to ensure that the pathways for water to ingress are properly sealed off. A depth of technical knowledge and experience, along with a proud reputation for integrity and reliability, has made Waterstop Solutions the go-to company for many Defect Managers working for major construction companies across Queensland and New South Wales.

We at Waterstop Solutions have the technical and practical expertise to diagnose the source of the leak and will provide you with our recommended solution to achieving an effective, high-quality, long-lasting repair to stop the water ingress with minimal disruption

We believe in and are committed to always delivering high-quality solutions by utilising the right products and techniques for each specific project combined with our industry-leading know-how on tap. We have a large talent pool of specialist leak sealing and concrete repair technicians with Certificate III in construction waterproofing in Queensland and New South Wales that are extensively trained in our systems and project execution methods.

The leadership positions on every Waterstop Solutions project are operated by highly qualified, certified and experienced industry professionals. Our in-house skills and expertise gained from more than 60 years of industry experience provide a full range of high-quality remedial waterproofing and concrete repair works to commercial buildings, civil infrastructures, industrial sites and residential properties. From waterproofing diagnostics, preventative and remediation solutions โ€“ All of our waterproofing solutions are quality guaranteed.


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