ROOF MEMBRANES

POLYBIT BITUPLUS P 4180

Plastomeric membrane with excellent heat & UV resistance and waterproofing properties

Excellent resistance to positive water & vapor pressure Good heat resistance Good dimensional stability under tension Can accommodate structural movements because of excellent flexibility High puncture and fatigue resistance High tensile and tear strengths Resistant to water borne chemicals

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Description
How to Use

Product Description

Bituplus P membrane is a plastomeric waterproofing membrane, manufactured from a rich mixture of bitumen and selected APP (Atactic Poly Propylene) polymers blended together to obtain excellent heat & UV resistance and waterproofing properties. The polymerized bitumen is coated on to a dimensionally stable reinforcement core of non-woven spun bond polyester rot-proof fabric.

Excellent resistance to positive water & vapor pressure Good heat resistance Good dimensional stability under tension Can accommodate structural movements because of excellent flexibility High puncture and fatigue resistance High tensile and tear strengths Resistant to water borne chemicals

How to Use

Priming

Apply Polyprime SB* (solvent based primer) @ 4-6 m²/L to a clean smooth and dry surface by brush, roller or spray. Allow the primer to dry prior to the application of the membrane. The primer promotes the adhesion between the membrane and the concrete surface.

Torching

Start the installation of all membrane plies from the low point or drains, so the flow of water is over or parallel to the plies, but never against the lap.Bituplus P membranes are installed by using a cylinder fed propane gas torch. Begin torching the embossed polyethylene side of the rolled portion of the membrane. As the membrane is heated the embossing starts to melt away exposing a shiny bitumen surface. Roll forward the membrane and press firmly with the boot or roller against the substrate to bond well.

Sealing

Heat both the overlaps and use round tipped trowel to seal the overlap. Adequate heat is confirmed when a uniform flow of melted bitumen compound flows evenly in a bead that oozes from the applied membrane’s edges. Excess compound should be smoothened and pressed into the seam using a heated trowel. Any un-bonded areas must be lifted and re-torched.

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