WHAT IS WATER STOP LIQIUID MEMBRANE?
Selsil Water Stop Liquid Membrane, a one-component, hybrid polymer-based, low-viscosity waterproofing product. Free from solvents, isocyanates, and bitumen. Upon contact with air, it cures to form an elastic and waterproof layer.
Liquid Membrane can be applied using either a brush roller or airless spray, it’s recommended that you apply a double coating in order to get the full longevity out of the product and top up any low, hard to fill or weak areas. You should wait for the first coat to be completely dry before applying a second.
Similar to GRP, it offers a seamless protection and can be used for complex detailing such as going around pipes, whilst also offering more DIY friendly alternative than GRP. The application process involves:
1. Ensure that surface area is clean of all dust, dirt, grease and loose debris.
2. Apply the first coat using either a roller or airless spray, same as you would if painting.
3. After waiting for the 1st layer to completely dry, apply an additional layer, during this process, check for any air bubbles & places with poor adhesion.
4. Once the 2nd coat is completed, leave the product to fully cure for 24 hours, protecting it from any rain.
Caution: Ensure the following 24 hours after application will not drop to freezing temperatures before applying the product.
What are the benefits of Waterstop Liquid Membrane?
Seamless
Applied almost like paint, providing a joint free roofing option. Often seen as a more aesthetically pleasing option and eliminates the most common point of failure with sheet membrane roofing.
DIY Friendly
Can be applied in the cold, simply using a brush and eliminating the need for an open flame like felt. Unlike GRP liquid membrane is a one component formula, meaning you avoid complex mixing formulas.
Adaptability
Due to it being a liquid, it can be molded around more intricate details of a roof easier such as pipes and more intricate detailngs, where a sheet membrane can be more complex.
Versatile Bonding
Unlike other roofing options such as EPDM, which can only be glued down to wood, Liquid membrane can be used on a wider range of surfaces such as stone and metal when mixed with a hardener.
FREQUENTLY ASKED QUESTION
Do I need a primer?
Unlike many other liquid membrane/ hybrid polymer roofing systems, Selsil's Waterstop Liquid Membrane does not require a primer before application even when coating metal. The surface area must be clean, dry and free from dust & grease.
How long does Liquid Membrane take to cure?
It can take anywhere between 30 minutes to 40 hours to cure between applying coats depending on the heat, humidity and weather and a full 24 hours after the final coat.
How many coats of Liquid Membrane should I apply?
For the best performance and better longevity of your roof, it is recommended to a apply 2 coats, ensuring the first coat is fully dry before applying the second coat. After applying both coats the liquid membrane should not be exposed to water for at least 24 hours.
What surfaces can Liquid Membrane be applied to?
Selsil's Waterstop Liquid Membrane can be applied to a variety of different surfaces such as; Concrete, stone, wood, metal, zinc, clay tiles, slate, felt, various plastics & EPDM.
How many sqm does a tub of Liquid Membrane cover?
Provided you apply the recommended 2 coats of Liquid Membrane, one 14Kg tub containing 2 7Kg bags, should cover between 8 - 10sqm depending on the surface texture and thickness of the coat applied.