Welcome to Remseal Pty Limited, Sydney’s Waterproofing  & Leak Specialists

Residential Waterproofing | Commercial Waterproofing | Civil Waterproofing | Strata Waterproofing | Remedial Waterproofing

Remseal is a prominent Sydney based waterproofing company proud of being recognized as one of the market leading Sydney waterproofing specialists. As waterproofing professionals, Remseal offers all types of waterproofing services and solutions to all areas. Our in house Sydney waterproofers are experienced waterproofing experts delivering the highest professional quality in torch on membranes, PVC sheet membranes, polyurea coatings,  joint sealing, epoxy coating, & all polyurethane membrane liquid applications.  We cover all concrete waterproofing surfaces to the standard bathroom waterproofing renovation throughout Sydney & South New South Wales. With over 37 years in the waterproofing and remedial industry, our Sydney waterproofing specialists carry the highest expertise when it comes to all waterproofing services and restoration repairs. 

Concrete Roofs  | Planter Boxes | Balconies | Terraces | Wet Areas | Basements | Car Park Waterproofing | Retaining Walls | Bridges | Tunnels | Tanking | Lift Pits | Damp Proofing

“Sydney Waterproofing Specialists Covering All Aspects Of Waterproofing Services & Remedial Building Repairs”

Butynol Sheet Membrane | Torch On Membrane | PVC Sheet Membrane  | Polyurea Coating | Epoxy Coatings | Liquid Membrane 

Leaking Basements | Concrete Spalling | Concrete Cancer | Injection Resin  | Cathodic Installation | Basement Ventilation  | Subsoil Waterproofing | Epoxy Grouting

Roof Tops

Torch On Membranes , Epoxy Based Membrane , PVC & Many More..

Green Roofs

Soil & Turf applications installations with controlled plantation.

Wet Areas

Waterproofing to all internal & external waterproofing to bathrooms, laundries, powder rooms, balconies, podiums, etc.

Injection Repair

DPC injection, Damproofing, leaking basements, & many more

Roof Terraces

Installation of trafficable sheet membranes along podiums, common areas, & many more.

Subterranean Waterproofing

Retaining walls, lift pits, sprinkler rooms, bentonite installations, & many more.

“Trusted Waterproofing Specialists Servicing Areas Throughout Sydney CBD extending to Gerringong NSW”


Remseal conducts all leak prevention & leak detection services to further the lifespan of the dwelling/structure without any waterproofing failures. A simple waterproofing application to a surface could possibly save future defective repairs leading to structural damages. From a basic water leak in a shower recess to a leaking rooftop, will eventually begin to cause structural effects possibly leading to black mould, concrete cancer, structural stressing, & timber rott.

“Trusted Waterproofing Specialists Company Providing Leak Detection Prior & Post Applications”


Bentonite Waterproofing

Butynol Membrane

Concrete Membrane

Concrete Spalling

Epoxy Flooring

Hydro - Static Waterproofing

Injection Repairs

Waterstop Waterproofing

Joint Membranes

Liquid Waterproofing

Polyurea Waterproofing

Torch on Membrane




Waterproofing is vital in all buildings to stop water and moisture from entering the structural areas of the building and causing damage.

Leak Detection

Remseal leak detection Sydney carries the expertise in discovering defective water leaks prior or post construction. Our experienced waterproofing specialists carry all investigation practises to identify any defective waterproofing applications or required waterproofing services to all areas. 

Remedial Services

Remedial waterproofing services are required to any post construction dwellings or structures. Remseal Pty Ltd specialises in all remedial repairs relating to concrete spalling, concrete cancer, waterproofing repairs, and many more.

Video presentation

Our affected leak prevention & leak detection services, will identify the leak along with a step-by-step quotation illustrating all stages of repairs. Our highly skilled technicians will conduct a leak detection investigation with moisture surface readers and infra-red diagnostics to illustrate the pattern of the waterproofing leaks. Whether its a leaking roof top, basement, bathroom, balcony, planter box, facade, etc. be rest assured it’ll be found and rectified in accordance with the Building Code of Australia.

We also use state of the art job management software which with one click all details and history of the job can be tracked and reported, resulting “customer satisfaction”. Our Services vary from bathroom renovations to roof top waterproofing coverings. All Remseal staff carry extensive experience in all waterproofing applications & remedial services.

Our Services


  • Residential Waterproofing
  • Bathroom Renovations
  • Commercial Waterproofing
  • Civil Waterproofing
  • Remedial Waterproofing
  • Protective Coatings
  • Structural Strengthening
  • Building Repair & Refurbishments
  • Rising Damp injection
  • Damp Proofing Repairs
  • Basement Ventilation
  • Concrete Spalling Services
  • Cathodic Coating Services

Why Choose Us


    • 100% Customer Satisfaction
    • Fully Licenced, Insured, & certified in All Waterproofing & Remediation
    •  Free Site Consultation & Quotation
    • Up to 20 Years Warranty on Services
    • Family Friendly Staff & Personnel
    • Daily Updates Through Smart Phone Application
    • 100% Australian Made Products
    • All Works in Accordance with Australian Standards


Albury - Wodonga Campus Roof Top

Roof top reimbursements. Removal of asbestos roofing panels, installation of new cement bedding with falls outlets to new installed overflows. installation of 3 layer torch on sheet membrane with podium plinths.

Alford's Point Bridge

Concrete repair mortar repairs along with the installation of thermal joints. High levels of corrosion repairs conducted along structural pining. Installed 2 layer sheet membrane system underlays throughout bridge road.

Radisson Blu Hotel

Roof Top leak detection conducted by Remseal identified high levels of failed waterproofing. Re installation of 3 layer torch applied membrane, followed by re-installation of river pebbles & insulation boards.

Westfields Miranda

Installation of a 3 layer UV stable sheet membrane application along concrete roof top. Installation of precast service plinths along nominated locations.

Rose hill Gardens Racecourse

Installation of 3 layer epoxy traffic-able membrane along all service areas, podiums, & control centers.

Domus Apartments - Arncliffe NSW

Remseal conducted all waterproofing applications to roof tops, podiums, planter boxes, & external walkways. All membrane applications consisted of 2-3 layer heat applied sheet membrane with UV mineral topping layers on traffic-able areas.

Sanctuary Apartments - Hurstville NSW

Remseal conducted all internal wet area waterproofing along with roof tops, balconies, terraces, lift pits, OSD tanks, sprinkler rooms, & basement bentonite applications.

Strata Management - Balcony Refurbishment - Mosman NSW

Replacement of roof top waterproofing membrane with topping bedding, underlay membrane, insulation boards, apron flashing, & river pebbles.

Roof Top Waterproofing - The Oaks NSW

Removal & replacement of roof top waterproofing membrane with a 4 layer heat applied sheet membrane. Installation of thermal insulation layer followed by a 3 layer torch on membrane.




"very impressed with Sam & his team"

testimonial 1
My husband and I were very impressed with the professionalism of Sam and his team. They were very helpful and fixed our balcony to a very high standard. Sam explained every step of the process. We would be happy to recommend Remseal to anyone.   Sam and his team have been doing repairs at my investment properties for the last 2 years. I have nothing but gratitude for Sam and his boys as they really go above and beyond in all the aspects of their work. I've contacted Sam all hours of the day and never had him not return my call if missed. Seing the bad review below clearly is a competitor trying to knock a hard working Aussie company that actually puts their clients needs first. We always use Remseal for all waterproofing repairs and had never had an issue with them what so ever & will continue to do so in the future.   Keep up the good work remseal.

"We would definitely recommend Remseal"

testimonial 2
We had water coming in our basement after heavy rainfall which was getting progressively worse. Contacted Sam at Remseal who came out straight away and provided a quote and advice. We went ahead and once the job was underway it became apparent the job was much bigger than anticipated.   Sam spent his own time rectifying the issues, always updating us on progress and nothing was ever too much of a problem. He provided great customer service and we are more than happy with the job. We would definitely recommend Remseal.   Sam you and your team did a great job! Thank you