NWT332 Smoke-Free, Non-Curing Rubber-Asphalt Waterproof Coating

This product is a new type of waterproofing material made primarily from asphalt and chlorobutyl rubber. It maintains a viscous paste-like consistency with creep properties even under long-term use. The product seals cracks and capillaries in the substrate, adapts to complex application surfaces, and does not cure even after prolonged exposure to air, consistently maintaining its viscous, gel-like properties.

Product Features

• Never Cures: Remains a viscous paste even after application, exhibiting creep properties and never curing, and is capable of sealing cracks and capillaries in the substrate.
• High adhesion: It bonds well to materials such as concrete, stone, and aluminum panels; its adhesive properties and self-healing capabilities remain unaffected when exposed to water.
•  High Self-Healing Capability: It possesses excellent self-healing properties; even if minor damage occurs during the installation or use of the waterproofing layer, it can repair itself.
• High Corrosion Resistance: It exhibits outstanding resistance to acids, alkalis, and salts, and can withstand relatively harsh operating environments.
• Smoke-free, Safe, and Eco-Friendly: The coating is formulated using smoke-free technology, requires a low application temperature, and emits no fumes during use, making it safe and eco-friendly.

Construction Methods

Non-curing rubber-asphalt waterproofing coatings must be used in combination with waterproofing membranes. They can be applied using either a trowel or a spray.

• Application by Scraping Method

It is primarily suitable for areas that are easy to apply by trowel—such as underground floor slabs, vertical walls, and roofs—as well as at joints, for small-scale waterproofing projects, and for areas where spray application is not suitable.

• Spray Application Method

It is primarily suitable for large-area waterproofing projects and areas where application by brushing is difficult.

Spraying work should be carried out in sections, and protective covering should be set up in advance. Each application pass should extend 300 mm beyond the width of the membrane. Adjust the distance and angle between the spray nozzle and the substrate. During application, spray in multiple passes to achieve the designed thickness, alternating the spray direction with each pass. The overlap width between successive passes within the same layer should be 30–50 mm.

• Installing Roll Materials

Before applying the coating, lay the waterproofing membrane flat on the substrate, then begin rolling it from both ends toward the center. At this point, apply the preheated waterproofing coating using a spray or trowel method, starting from the front of the rolled-up membrane. Lay the membrane while applying the coating, or wait 2–3 minutes before laying it. The coating must be applied evenly and smoothly, with no exposed substrate and a uniform thickness throughout.

Applications

Suitable for subbases with significant unevenness and high stress, as well as areas where deformation is foreseeable or occurs frequently;

Suitable for projects where open-flame installation, mechanical installation, and cold-adhesive installation are not permitted;

Suitable for waterproofing and leak-sealing projects in underground structures, on rooftops, in subways, tunnels, culverts, roads, bridges, and other similar locations;

Packaging, Storage, and Transportation

• Packaging: Packed in sealed metal drums.
• Storage and Transportation: This product is non-flammable and non-explosive and may be transported as general cargo. During transportation, protect the product from freezing, rain, direct sunlight, crushing, and impact, and ensure the packaging remains intact. The storage temperature should not exceed 40°C. During storage, ensure the area is well-ventilated and dry, and protect the product from direct sunlight; the storage temperature must not be lower than 5°C. The shelf life is at least 12 months.

Performance Metrics

Applicable Standard: JC/T 2428-2017, “Non-Curing Rubber-Asphalt Waterproof Coating”