Waterproofing with Chlorinated Rubber Paint
Waterproofing with chlorinated rubber paint is a technique used on roofs, swimming pools and industrial floors thanks to its ease of application and low cost. However, in this article we will see what are its limits and alternatives.
Table of Contents
What is chlorinated rubber paint and what is it used for?
Chlorinated rubber paint is a surface coating formulated with a chlorinated rubber base that provides water resistance and good adhesion. It is applied in several coats (minimum 2 or 3) with the help of a roller, although it is important to respect the necessary drying time between coats, which is approximately 24 to 48 hours.
Its main function is to create a protective film on the substrate to prevent the passage of water, reduce the appearance of leaks and other types of humidity.
Its main components are:
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Chlorinated Rubber |
Chlorinated natural or synthetic rubber forms a waterproof film when applied to the surface. |
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Resins and plasticizers |
They improve the adhesion and flexibility of the film. In addition, they allow the paint to expand or contract without cracking, although to a lesser extent than other more modern waterproofing systems. |
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Pigments and minerals |
To provide color, opacity and UV resistance. In the case of chlorinated rubber paints for swimming pools, chlorine and water resistant paints are always used. |
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Organic solvents |
To dissolve the rubber and facilitate its application |
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Specific additives |
Components that are added to improve its properties such as drying, gloss or mold resistance. Chlorinated rubber with fiber increases its mechanical resistance and avoids micro-cracks. |
Types of chlorinated rubber paint for waterproofing different locations
As mentioned before, different types of chlorinated rubber can be used to waterproof different spaces:
- Chlorinated rubber paint for swimming pools uses pigments resistant to chlorine or salt water.
- The exterior chlorinated rubber paint contains additives to improve its resistance to weathering or UV rays.
- Harder resins and anti-skid additives are added to chlorinated rubber for floors.
- Chlorinated rubber with fiber integrates microfibers to reinforce layers and prevent cracks.
However, waterproofing with chlorinated rubber is not always the best option, since its formulation does not provide sufficient flexibility or stability against UV rays.
Also, over time, the solvent evaporates, the film hardens and becomes brittle, especially in corners and wall junctions. For this reason, it is not usually used as a permanent waterproofing system and is reserved for decorative or maintenance uses.
Advantages and disadvantages of chlorinated rubber paint
As we have seen, the advantages of waterproofing with chlorinated rubber include easy application of the paint, low initial cost and different formulations for various applications.
However, waterproofing with chlorinated rubber paint has disadvantages:
- It has limited durability: it degrades due to the action of the sun and humidity, loses flexibility and cracks.
- Dry application: if applied when the substrate is wet it may cause early failure.
- Low compatibility with other products: it must be removed before applying other waterproofing solutions.
- Frequent maintenance: needs repainting every few years.
- It is not suitable if it remains in prolonged contact with humidity because it will peel and crack.
- Low elasticity: it does not absorb structural movements or expansion of the substrate (you can learn more in our article on what expansion joints are and what they are used for).
Alternatives to chlorinated rubber waterproofing
Faced with the disadvantages of chlorinated rubber and even the disadvantages of roofing felt (insert article link when published), waterproofing membranes are a solution that offers comprehensive and long-lasting protection.
With the waterproofing sheets it is achieved:
- Longer durability: more than 50 years of useful life without periodic maintenance
- Total adaptability: conforms to irregular surfaces, joints and corners
- Quick installation: no need for the surface to be completely dry or free of moisture
- It is compatible with different types of substrates and existing systems and can even be covered with ceramic tiles without waiting for drying processes.
- Technical guarantee: unlike chlorinated rubber waterproofing, waterproofing membranes have certifications that guarantee their resistance and performance.
- They are recyclable and environmentally friendly, unlike chlorinated rubber paints.
Why not choose Chlorinated Rubber Paint Waterproofing?
Although waterproofing with chlorinated rubber paint can be an inexpensive and simple solution for temporary or decorative applications, its limitations make it unsuitable for long-term projects. There are superior and equally cost-effective long-term alternatives such as waterproofing sheets that provide long-lasting protection and are easy to install. Reduce risks and increase the effectiveness of waterproofing surfaces with them.
Preguntas frecuentes sobre impermeabilización con pintura clorocaucho
¿Qué es exactamente la pintura clorocaucho?
La pintura clorocaucho es un recubrimiento formulado con caucho clorado, resinas y solventes que crea una película impermeable sobre el soporte. Se utiliza para proteger superficies frente al agua, como cubiertas, piscinas y suelos industriales.
¿Para qué sirve la pintura clorocaucho en impermeabilización?
Sirve para formar una capa continua que reduce la filtración de agua y la aparición de humedades. Se aplica en varias manos con rodillo, respetando tiempos de secado de entre 24 y 48 horas entre capas.
¿Es la pintura clorocaucho una solución de impermeabilización permanente?
No. La pintura clorocaucho tiene una durabilidad limitada, se degrada con el sol y la humedad, pierde flexibilidad y termina agrietándose, especialmente en esquinas y encuentros con muros. Por ello se considera más adecuada para usos temporales o de mantenimiento.
¿Se puede aplicar pintura clorocaucho sobre superficies húmedas?
No es recomendable. La impermeabilización con pintura clorocaucho debe hacerse siempre sobre soportes secos. Si se aplica con humedad, aumenta mucho el riesgo de desprendimientos y fallos prematuros del recubrimiento.
¿Qué tipos de pintura clorocaucho existen para impermeabilizar?
Hay formulaciones específicas según el uso: pintura clorocaucho para piscinas resistente al cloro, clorocaucho exterior con aditivos frente a rayos UV, productos para suelos con resinas más duras y versiones con fibra para reforzar mecánicamente la película.
¿Cuáles son las principales desventajas de la pintura clorocaucho?
Su principal problema es la baja elasticidad y estabilidad frente a la intemperie. Se degrada con el sol, requiere mantenimiento frecuente, no soporta bien movimientos del soporte y suele ser poco compatible con otros sistemas de impermeabilización que se quieran aplicar después.
¿Se puede aplicar otra impermeabilización encima de pintura clorocaucho?
Por lo general no es recomendable aplicar otros sistemas directamente sobre clorocaucho. Lo habitual es retirar completamente la pintura antes de colocar una impermeabilización más avanzada, como una lámina o un sistema cementoso.
¿Cuál es la mejor alternativa a la pintura clorocaucho para impermeabilizar?
Las láminas impermeabilizantes ofrecen una protección mucho más duradera y flexible. Sistemas como la lámina Water-Stop permiten una impermeabilización continua, con alta elasticidad, certificaciones técnicas y una vida útil muy superior a la de la pintura clorocaucho.
¿Qué ventajas tienen las láminas impermeabilizantes frente al clorocaucho?
Aportan mayor durabilidad, mejor adaptación a juntas y esquinas, compatibilidad con distintos soportes, posibilidad de revestir con cerámica encima sin esperar largos tiempos de secado y un menor impacto ambiental, ya que muchas son reciclables.
¿Cuándo tiene sentido usar pintura clorocaucho y cuándo es mejor una lámina?
La pintura clorocaucho puede ser útil en trabajos rápidos, zonas decorativas o soluciones temporales. Para proyectos a largo plazo, superficies expuestas al sol o zonas críticas frente a filtraciones, es mucho más recomendable utilizar láminas impermeabilizantes como Water-Stop.