Liquid waterproofing is an innovative method of protecting structures from water damage, especially in areas like bathrooms, basements, balconies, and roofs.
This FAQ covers the most common questions about liquid waterproofing to help you understand the application process and its benefits.
1. What Is Liquid Waterproofing?
Liquid waterproofing is a flexible, liquid-based membrane that creates a seamless waterproof barrier on surfaces. It's often used on concrete, wood, and metal to prevent water ingress, protect from humidity, and reduce wear from weather exposure.
2. How Does Liquid Waterproofing Work?
Once applied, the liquid waterproofing material dries and cures into a solid, elastomeric layer. This layer acts as a barrier against water, preventing it from seeping into the surface and causing potential structural damage.
3. Where Can Liquid Waterproofing Be Used?
Liquid waterproofing can be used in a wide range of areas, including:
- Bathrooms and showers
- Balconies and terraces
- Rooftops
- Basements
- Kitchens
- Around pools and spas
The SEMCO Works Liquid Membrane™️ has one of the widest range of applications as it can be applied onto 15+ substrates, including: concrete, wood, tiles, interior & exterior cladding, sheeting, fibreglass, metal, aluminum, plaster, villaboard, asphalt, MDF & bricks.
4. What Are the Main Types of Liquid Waterproofing?
The main types of liquid waterproofing products include:
- Acrylic-based: Cost-effective and easy to apply but best for areas with minimal exposure to extreme conditions.
- Polyurethane-based: Highly durable and flexible, suitable for high-moisture areas.
- Bitumen-based: Best for surfaces that will be exposed to direct water, such as rooftops.
- Silicone-based: Known for elasticity, ideal for surfaces with potential movement or expansion.
SEMCO Liquid Membrane™️ ticks all the boxes. Its hybrid elastomer blend enables easy application while providing excellent bridging, and waterproofing capabilities - making it an easy choice compared to rubber and silicone based membranes.
5. Is Liquid Waterproofing Better than Sheet Membranes?
Liquid waterproofing offers a seamless application, which is a significant advantage over sheet membranes that can have overlaps and require additional adhesives. Liquid waterproofing is also more flexible, easier to apply in small or irregular spaces, and less prone to failure from joint weaknesses.
6. How Long Does Liquid Waterproofing Last?
The lifespan of a liquid waterproofing membrane depends on the type and quality of the product, environmental conditions, and proper application. Generally, liquid waterproofing can last anywhere from 5 to 20 years, with polyurethane membranes often lasting the longest.
7. Can I Apply Liquid Waterproofing Myself?
Most liquid waterproofing is DIY-friendly, especially Liquid Membrane™️ which is applied in just 2-3 coats with a brush, roller, or spray gun. However, if you’re not confident in your DIY skills, you can always engage a professional.
8. How Do I Prepare a Surface for Liquid Waterproofing?
Surface preparation is key for long-lasting waterproofing. We have detailed instructions for preparation by substrate on this page. Steps typically include:
- Cleaning the area thoroughly to remove any dust, dirt, or grease.
- Repairing any cracks or holes to create an even base.
- Priming the surface, especially if it’s porous, for optimal adhesion of the waterproofing product.
Following these steps can help ensure a durable, effective waterproof barrier.
9. How Long Does It Take to Apply Liquid Waterproofing?
The application time will differ for every product. For our Liquid Membrane™️, each coat only takes 45 minutes to 1 hour to dry. This means you can finish the standard two-coat system in just a couple of hours.
Curing time also varies by product, as well as depending on the temperature, humidity and airflow. Typically, initial cure is within 6 - 7 days or submerged areas/showers as per specific product recommendations (can be less for drier areas). Avoid exposing the area to a lot of water or heavy traffic during this time, as it can affect the membrane’s integrity.
10. What Are the Benefits of Liquid Waterproofing?
Some key benefits include:
- Seamless application for better waterproofing without joints.
- Flexibility to accommodate surface movement without cracking (Liquid Membrane boasts an unmatched 1300% elongation!)
- Versatility for use on different surfaces and in a variety of applications.
- Longevity with reduced maintenance needs in comparison to other waterproofing methods.
Here’s a more in-depth look at the reasons why you should choose liquid waterproofing.
11. Are There Any Downsides to Liquid Waterproofing?
Liquid waterproofing is highly effective and user-friendly, so there aren’t many limitations to its use.
The only things to keep in mind are to ensure proper surface preparation to prevent peeling or cracking, and to choose your product wisely. Some liquid formulas may be susceptible to UV degradation over time unless protected with an additional topcoat. A hybrid elastomer blend like Liquid Membrane™️ ticks all the boxes compared to rubber and silicone formulas.
12. How Much Does Liquid Waterproofing Cost?
The cost varies widely based on product type, brand, and project scope. Our aim is to provide a user-friendly professional-grade waterproofing solution to homeowners at an affordable price. Liquid Membrane™️ is very cost-efficient thanks to its excellent coverage. A little goes a long way; each litre provides 2-3m2 of coverage at 2 coats (0.75mm each coat). It’s around $13 per m2 based on 10L bucket.
Liquid waterproofing is an effective and versatile solution for homeowners and professionals alike looking to preventing water damage in various settings. Understanding these FAQs can help you make informed choices for your next waterproofing project. If that means choosing Liquid Membrane™️, you can order in Australia now and get 10% off your first purchase with the code WELCOME10 (T&Cs apply — only while offer lasts).