sM--- PVC liners have been successfully applied in several European countries and the USA as a waterproofing system, as they represent a safe and efficient solution. Their application is much faster than other traditional solutions because the material comes pre-fabricated and requires no on-site action to adhere to the substrate and ensure soil isolation. Brasil Piscis presents the Liner Brasil Piscis 0.4mm line, ensuring secure and reinforced waterproofing, as 0.4mm is the most commonly used thickness in civil construction waterproofing projects! Avoid the risk of redoing your project due to leaks and hire Brasil Piscis for the installation of your natural pool or artificial lake. Complete technical support! Contact us for custom sizes quotations! Custom-cut liners are usually more cost-effective! Product with a warranty (2 years)! Count on us especially for after-sales service! We provide installation and maintenance of lakes and pools. For more information, contact us at [email protected] or (11) 2121-5593. **DETAILED DESCRIPTION** **PVC** PVC components stand out in the contemporary world for their versatility, lightweight, scalability, durability, and sustainability. These attributes have made PVC a sustainable option and the most consumed plastic in civil construction in Brazil and worldwide. **PVC Waterproofing Liners** Waterproofing is one of the most critical stages in the construction of ornamental lakes. Few professionals plan and execute it properly, which explains the incidence of problems in project delivery. The systems are hidden under soil, water, and finishes, making waterproofing solutions harder to understand in their real importance, even among technical professionals. PVC liners have been successfully applied in several European countries and the USA as a waterproofing system, representing a safe and efficient solution. Their application is much faster than other traditional solutions because the material comes pre-fabricated and requires no on-site action to adhere to the substrate and ensure soil isolation. The cleanliness of the work front is another feature of these applications, as there is no need to apply any other material besides the liner itself. Even the equipment used, such as industrial blowers, is easy to handle, dispensing with special skills from applicators. Since the liners usually remain under water, soil, and finishes, they require no maintenance. Their service life meets the demands of various structural solutions. **Calculate the liner for your natural pool or artificial lake project** Use the following formula: Formula: Liner size (L) = length or width (C) + twice the depth (P) + 0.40 cm. As an example, let's calculate the Liner for the following lake: Lake of 2.00m x 2.50m x 0.30m (length x width x depth) Applying the formula for the lake's length: L = C + 2(P) + 0.40, where L = 2.00 + 2(0.30) + 0.40 L = 3.00 m Applying the formula for the lake's width: L = C + 2(P) + 0.40, where L = 2.50 + 2(0.30) + 0.40 L = 3.50 m Conclusion: The ideal measurement for the construction of the analyzed lake is 3.00 x 3.50 m. *Note: Measurements are in meters.* **Why use the Liner?** The Liner SP Geo, in PVC from Brasil Piscis, is a continuous, pre-assembled, and welded liner, allowing precise and secure applications in ornamental lakes, avoiding installation errors. Once produced and prepared, in various pre-defined sizes or custom-made for the application site, the liners can be transported to the site and easily laid over the areas to be waterproofed, using the stored water to position the liner and ensure its perfect adaptation to the walls. Being an absolutely inert material, it does not contaminate the reservoir waters. If there is a need to compose waterproofing liners on-site, the welding process is done by hot air blowers or portable electronic welders. In addition to ornamental lakes, PVC flexible liners have other important applications, such as insulating earth masses in landfills, irrigation channels, rural reservoirs, internal coating of public reservoirs, tanks for fish, frogs, and aquaculture, liquid storage, manure, and waterproofing of subsurface. A very convenient and economical use is the application of PVC liners as internal coating in existing water reservoirs facing leakage problems due to the exhaustion of the original waterproofing systems' insulation capacity. PVC waterproofing liners are resistant to moisture and do not change their volume when in contact with water. They resist aging, attack by microorganisms, as well as alkalis and acids potentially present in rainwater or groundwater. They also withstand aggressive groundwater and perforation by sand grains. Even when subjected to temperatures ranging from 0°C to 70°C, they do not bubble or crack and maintain their uniformity. **PVC vs. EPDM** 1. **Product Characteristics** – PVC and EPDM liners have distinct compositions, but they behave very similarly, offering good flexibility and high elongation. In cold countries, EPDM has an advantage over PVC as it maintains high elongation even at temperatures below -5°C, although this characteristic is not highly relevant in Brazil. 2. **Assembly Accessories** – PVC liners do not require specific installation accessories like EPDM liners. It is possible to waterproof with PVC using only products found in construction stores and chemical product houses. 3. **Maintenance** – If maintenance is necessary, PVC liners are easily repaired using products available in the market such as "Colavinil". They can also be repaired with a solvent called Tetrahydrofuran (THF), found in chemical product houses, meaning they do not require specific products provided only by the liner manufacturer. **Warranty** Factory warranty against manufacturing defects, not covering misuse or improper installation. Images are for illustration purposes only and may not accurately represent reality.