Navapada Sales

APP (Atactic Polypropylene) membrane waterproofing uses torch-applied, modified bitumen sheets blended with APP polymers for a durable, seamless, and flexible barrier against water, ideal for roofs, basements, and wet areas by enhancing bitumen's UV resistance and high-temperature performance, applied with heat to bond to surfaces like concrete and brick.  

Key Features & Benefits:

Polymer Modified: 

Asphalt blended with APP polymer improves elasticity, UV resistance, and resistance to extreme temperatures, notes Tikidan and Asian Paints.

Torch Applied: 

Heat from a blowtorch melts the bitumen, allowing it to adhere and create a waterproof seal. 

Reinforced: 

Often reinforced with polyester or fiberglass for high tensile strength and tear resistance, adds S.N.I. Infratech Private Limited and Tikidan.

Durable: 

Offers long-lasting protection, excellent aging resistance, and is suitable for various climates, especially hot ones like India's. 

Common Applications:

Flat & Sloped Roofs, Terraces & Balconies, Basements & Foundations, Water Tanks & Ponds, and Retaining Walls & Concrete Channels. 

How it Works:

Surface Prep: The concrete or substrate is cleaned and primed.

Application: Rolls of APP membrane are unrolled onto the surface.

Torch Welding: A torch is used to heat the underside of the membrane, melting the bitumen, which then fuses to the substrate, creating a continuous, seamless, and waterproof layer. 

SikaProof®-312 IN HDPE is a unique HDPE based selfadhesive membrane fully bonded sheet membrane comprising of a virgin HDPE layer, coated with a high bond strength adhesive, and covered with a release liner, for below ground waterproofing of reinforced concrete structures. It is loose laid onto prepared substrates or formwork before fixing reinforcement and casting concrete. The adhesive layer is activated when the concrete is poured on the surface and forms a permanent bond with the fresh concrete which will prevent the ingress of water around the structure. Reinforcement can be directly laid on top of the membrane and it does not require screed protection