Liquid plastic roof renovation: Solutions & Pur-Protect experiences

• A one-component, water-based liquid plastic based on polymer dispersions • Plasticizer- and solvent-free • Highly elastic – ideal for crack bridging when used with reinforcing fleece • Cross-links after drying to form a seamless, jointless waterproofing layer. This liquid plastic is a high-quality, durable, and easy-to-apply coating for sealing and protective applications, especially on roofs. Its strengths lie in the combination of UV resistance, crack bridging, durability, and ease of use, making it ideal for both professionals and ambitious DIYers. Key advantages: • Diffusion-open (breathable): flexible at temperatures from -30°C to +100°C • Waterproof: does not swell in standing water – thanks to high-quality mapping and fleece reinforcement • Easy application: can be applied with a roller, brush, roofing brush, or airless sprayer – also suitable for DIYers. • Cleanable with water • Low odor during processing – no plasticizers or solvents. No overlaps, mechanical fixings, or special heat welding equipment required – ideal for detailed connections. • Highly elastic and crack-bridging. • Weather and UV resistant – expected service life of over 25 years with full reinforcement.

At Pur-Protect, the term "full reinforcement" refers to a specific flat roof renovation technique. Full reinforcement describes the application of a liquid plastic waterproofing membrane in combination with a reinforcing fleece across the entire roof surface. The fleece is embedded seamlessly and completely within the first layer of the liquid plastic – this is known as "wet-on-wet" application.

According to test reports, the expected service life of the liquid plastic is at least 25 years when the system is applied correctly – especially with full reinforcement using nonwoven fabric. • Service Life Classification: The product has been tested according to ETAG 005 (European Technical Approval for liquid plastic waterproofing systems) and achieves service life class W3. 👉 This means: ≥ 25 years service life with proper application.

Liquid Plastic Application: (Suitable for flat roofs, balconies, terraces, connections, and detailing) 1. Substrate Preparation The substrate must be: Clean, dry, and sound Free of dust, oil, grease, moss, and loose particles Suitable substrates: Concrete, screed, wood, metal, bitumen sheets, foil, PUR foam, old PURelastik coatings, tiles 👉 Note: Non-absorbent substrates (e.g., metal, tiles) must be pre-treated with a suitable primer. 2. Primer (if necessary) When?: Smooth, non-absorbent substrates Old coatings with poor adhesion 3. Installation of the Reinforcing Fleece (Full Reinforcement Recommended) 1. Apply a generous coat of liquid plastic. Insert the reinforcing fleece (PUR-protect reinforcing fleece) without air bubbles. Immediately apply more liquid plastic from above until the fleece is completely embedded. Fleece overlap: approx. 5 cm 👉 Why full reinforcement? Increases service life, improves crack bridging, and is essential for a service life of ≥ 25 years. 4. Applying the main layer After the first layer has dried (approx. 4–6 hours, depending on weather conditions), apply a generous coat of liquid plastic. Total layer thickness: at least 2.1 mm. Application is possible with a roller, brush, roofing brush, or airless sprayer. 5. Drying Times Skin Formation: approx. 1 hour at 20 °C Rainproof: approx. 4–6 hours Full Drying Time: approx. 12 hours per coat Fully Load-Bearing: after approx. 7 days 6. Application Conditions Temperature: +5 °C to +35 °C Humidity: max. 80% Substrate Temperature: at least 3 °C above the dew point (no condensation!) Do not apply in rain or frost.

Yes, liquid plastic is comparable to conventional roof waterproofing materials (membranes, bitumen) but offers additional advantages that set it apart. Unlike conventional waterproofing, liquid plastic is characterized by its seamless application, which ensures a continuous and uniform seal. This reduces the risk of leaks and cracks that can occur with welded or bonded seals. Liquid plastic offers high elasticity and resistance to extreme weather conditions, making it ideal for flat roofs, both with and without a slope. Furthermore, liquid plastic is highly adaptable and can be easily applied to complex roof structures and challenging substrates. This flexibility allows for quick and efficient renovation, often resulting in lower labor costs and a longer roof lifespan. Pur-Protect s.r.o. specializes in the renovation of flat roofs using liquid plastic and PUR roof spray foam, employing state-of-the-art technologies to achieve the best results. Yes, PURelastik liquid plastic is comparable to conventional membranes as a roof waterproofing material, but offers additional advantages that set it apart from traditional materials. Unlike conventional membranes, PURelastik is characterized by its seamless application, which ensures a continuous and uniform seal. This reduces the risk of leaks and cracks that can occur with welded or glued membranes. PURelastik liquid plastic offers high elasticity and resistance to extreme weather conditions, making it ideal for flat roofs, with or without a slope. Furthermore, the liquid plastic is particularly adaptable and can be easily applied to complex roof structures and challenging substrates. This flexibility allows for quick and efficient renovation, often resulting in lower labor costs and a longer roof lifespan. Pur-Protect specializes in the renovation of flat roofs using liquid plastic and PUR roof spray foam, employing state-of-the-art technologies to achieve the best results. If you are looking for a reliable and durable sealing solution, PURelastik liquid plastic from Pur-Protect offers an excellent alternative to conventional roofing membranes.

Yes, Pur-Protect's innovative solution with liquid plastic and reinforcing fleece can effectively renovate a damp, old foam roof! However, an individual approach is required after a preliminary assessment, possibly including the installation of flat roof vents, depending on the degree of dampness. Our specialized technology offers a seamless, waterproof seal specifically designed for the renovation of old foam roofs. Thanks to the outstanding elasticity and lasting weather resistance of our liquid plastic, it protects your roof from further water damage and extends the lifespan of your old foam roof. Our experts are highly familiar with the unique challenges of damp, old foam roofs and employ state-of-the-art methods to restore them to optimal condition. Trust Pur-Protect's expertise for sustainable roof renovation!

Yes, liquid plastic can be used to seal balconies and terraces – in fact, it's very well suited for this purpose. Its elastic and seamless properties offer many advantages in these applications. However, there is one limitation: if tables, chairs, or other furniture are placed on the surface and it is frequently used and walked on, then it's necessary to protect the coating with wooden boards, patio slabs, paving stones, or similar materials. The coating remains permanently elastic and would be damaged by excessive point loads.