MB-BT-P4Series: Bitüra

Bitüra P4 Polyester Membrane

4 mm APP-modified bitumen membrane on a polyester carrier; the main layer of two-layer terrace and foundation systems.

Coverage: 1,12 m²/m² (bindirme dahil, her kat için)
Packaging: 10 m² roll (1 × 10 m)
Application: +5 °C / +35 °C (uygulama ortamı)

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PDF documents are samples with a "DEMO" watermark.

Technical data

Coverage	1,12 m²/m² (bindirme dahil, her kat için)
Curing	Walkable as soon as it cools
Application temperature	+5 °C / +35 °C (uygulama ortamı)
Packaging	10 m² roll (1 × 10 m)
Colour	Black, PE film underside
Shelf life	12 months stored upright and dry
Thickness	4 mm
Carrier	Polyester keçe 180 g/m²
Cold flexibility	−10 °C
Tensile strength (long.)	≥ 700 N/5 cm

About the product

Bitüra P4 is made of APP (atactic polypropylene) modified bitumen on a polyester felt carrier for high tear and puncture resistance. It is torch-applied and used as the lower or upper layer of two-layer systems on terraces, under foundations and on retaining walls.

The polyester carrier lets the membrane elongate without tearing during minor settlement and thermal movement. The underside PE film melts under the torch and indicates proper bonding; the top face is sand or film finished.

Where the surface stays exposed to the sun, use it with the mineral-surfaced Bitüra Slate or under a screed/protection layer.

Areas of use

Terraces and flat roofs
Below foundations and retaining walls
Wet-area slabs (under screed)
Podium and car-park decks

Application steps

Sweep the deck, remove loose material and sharp edges; screed moisture must be below 4%.
Apply Astarix bitumen primer at about 0.3 kg/m² and let it dry completely.
Form fillets at upstands; pre-treat drains and penetrations with reinforcement pieces.
Torch-apply the rolls with 10 cm side laps and 15 cm end laps.
Check a 5–10 mm bitumen bleed at laps; lay the second layer offset by half a roll.
Turn the membrane at least 20 cm up the parapet and fix it with a termination bar and sealant.