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Sikalastic®-680 RT | MCT CHEMICALS | SIKA PAKISTAN PRIVATE LIMITED

Sikalastic®-680 RT is a high-performance, solvent-free, elastomeric, liquid-applied roofing and waterproofing membrane designed for use on a wide variety of surfaces. It is a two-component system that cures to form a durable, flexible membrane capable of withstanding harsh weather conditions and UV exposure. This advanced membrane system provides long-lasting protection against water ingress, ensuring a waterproof seal on both horizontal and vertical surfaces. It is ideal for use in a wide range of applications, including roof waterproofing, terraces, balconies, and other outdoor areas. Sikalastic®-680 RT is known for its high crack-bridging ability, making it an excellent choice for areas subjected to dynamic movement and thermal expansion

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Usage:

Sikalastic®-680 RT is suitable for the following applications:

  • Roof Waterproofing: Ideal for new or existing roofs, including flat, pitched, and domed roofs, offering superior protection against leaks and water damage.
  • Terraces and Balconies: Provides a durable waterproof membrane for outdoor spaces like terraces and balconies exposed to rain and UV radiation.
  • Green Roofs: Perfect for use beneath green roof systems, providing reliable waterproofing while allowing for planting and vegetation.
  • Podium Decks: Suitable for podium decks in commercial or residential applications, ensuring water resistance and longevity.
  • Walkways and Patios: Can be applied to walkways and patios to prevent water ingress and deterioration of the underlying structure.
  • Basements: Used to waterproof below-ground structures, including basements, foundations, and retaining walls, to prevent water penetration.
  • Swimming Pools: Provides waterproofing for pool areas, ensuring that water does not damage the underlying structure.

Application:

  1. Surface Preparation: Clean the surface thoroughly to remove any dirt, dust, oil, grease, or other contaminants. The substrate must be dry, sound, and free from any loose material. For porous surfaces, it may be necessary to prime the area with an appropriate Sika primer.
  2. Mixing: Mix the two components (Part A and Part B) of Sikalastic®-680 RT in the recommended ratio (usually 4:1) until a uniform mixture is obtained. Use a mechanical mixer to ensure complete blending.
  3. Application: Apply the mixed material evenly using a brush, roller, or airless spray gun to the prepared surface. For best results, apply two coats of Sikalastic®-680 RT, ensuring that the first coat is fully cured before applying the second. Maintain a uniform thickness of the membrane as per the recommended application rate.
  4. Curing: Allow the first coat to cure for the recommended period before applying the second. Ensure that the membrane cures completely before exposing it to foot traffic or environmental conditions. Curing time can vary depending on temperature and humidity but typically ranges from 12 to 24 hours between coats.
  5. Cleaning: Clean all tools and equipment immediately after use with water, as the material begins to cure once mixed.

Coverage Advantage:

Sikalastic®-680 RT offers excellent coverage with a typical application rate of 1.5–2.0 m² per liter depending on the substrate and desired thickness of the membrane. The product’s flexibility, crack-bridging ability, and high resistance to water make it an ideal solution for protecting both new and existing surfaces. Due to its efficient application, minimal material waste is generated, and it provides long-lasting performance, offering significant value for both residential and commercial waterproofing projects.

 

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