APP Polymer Modified Bitumen Waterproofing Membrane（Elastomer/plastic ）

APP (atactic polypropylene) plastic modified asphalt waterproofing membrane uses APP or polyolefin polymers (APAO, APO) modified bitumen as the coating and impregnating material. The carrier can be a high-quality polyester mat, fiberglass mat, or composite mat. The upper surface is finished with release materials such as PE film, fine sand, or mineral granules. The membrane is a flexible sheet material that can be rolled.

Specification / Feature	Details
Material Type	APP Polymer Modified Bitumen
Thickness Options	3mm APP membrane / 4mm thick APP membrane
Surface Finish	PE Film / Sand / Mineral Finish APP Membrane
Reinforcement	Polyester Mat (PY) / Fiberglass Mat (G)
High Temp Resistance	Up to +30 ℃ ~- +150 ℃
Standard Compliance	Meets ASTM D6222 / EN 13707 / CE Certified

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APP Modified Bitumen Waterproofing Membrane

Applications

Roofing waterproofing for industrial, commercial, and residential buildings – including non-trafficable roofs, trafficable roofs, insulated roofs, non-insulated roofs, green roofs, roof parking decks, and inverted roofs.
Below-grade waterproofing and damp-proofing for industrial and residential buildings, including indoor swimming pools and fire water tanks.
Civil engineering projects: subways, tunnels, bridge decks with concrete paving, wastewater treatment plants, and landfills.
Water conservancy facilities: canals and reservoirs.

Product Features

Long-fiber polyester mat membranes:

Combines high-performance long-fiber polyester mat with APP modified bitumen – excellent performance.
Forms a high-strength waterproof layer with strong resistance to water pressure.
High tensile strength and elongation – adapts well to substrate shrinkage, deformation, and cracking.
Good low temperature resistance, corrosion resistance, mold resistance, and weather resistance.
High-strength polyester mat offers strong puncture, tear, and fatigue resistance.
Easy torch application year-round – hot-air welded seams are reliable and durable.

Alkali-free fiberglass mat membranes:

Combines an economical carrier with high-performance APP modified bitumen.
High tensile strength, good thickness, strong damage resistance, and good dimensional stability.
Excellent high temperature resistance, corrosion resistance, mold resistance, and weather resistance.
Easy torch application year-round – hot-air welded seams are reliable and durable.

Glass-reinforced polyester mat membranes:

Can be installed using mechanical fastening – safe and environmentally friendly.
Offers better dimensional stability and fire resistance

Performance

Plastic-modified asphalt waterproofing membrane complies with GB18243-2008 standard.

No.	Parameter		Index
			Ⅰ		Ⅱ
			PY	G	PY	G	PYG
1	Soluble content（g/m 2 ）	3mm	2100				–
		4mm	2900				–
		5mm	3500
		Test phenomenon	–	Carrier non-combustible	–	Carrier non-combustible	–
2	Heat resistance	℃	110		130
		≤ mm	2
		Test phenomenon	No flow, no drip
3	Low temperature flexibility℃		-7		-15
4	Water impermeability (30min)		0.3 Mpa	0.2 Mpa	0.3 Mpa
5	Tensile strength	Max peak (N/50mm) ≥	500	350	800	500	900
		Secondary peak (N/50mm) ≥	–	–	–	–	800
		Test phenomenon	During stretching, partial cracking of the asphalt coating or separation from the carrier occurs on some specimens
6	Elongation	At max peak (％ ) ≥	25	–	40		–
		At secondary peak (％ ) ≥	–		–		15
7	Mass increase after water immersion(％) ≤	PE 、 S	1.0
		M	2.0
		Tensile retention (％ ) ≥	90
		Elongation retention (％ ) ≥	80
8	Heat aging	Low temperature flexibility (℃ )	-2		-10
			no cracks
		Dimensional change (％ ) ≤	0.7	–	0.7	–	0.3
		Mass loss (％ ) ≤	1.0
9	Peel strength of joint (N/mm) ≥		1.0
10	Nail tear strength a（N） ≥		–				300
11	Mineral granule adhesion b（g） ≤		2.0
12	Lower asphalt coating thickness c (mm) ≥		1.0
13	Accelerated weathering	Appearance	no slip, flow, drip
		Tensile retention (％ ) ≥	80
		Low temperature flexibility (℃ )	-2		-10
			no cracks
a. Only for membranes used in single-layer mechanical fastening b. Only for mineral-surfaced membranes. c. Only for torch-applied membranes.

Asphalt composite base waterproofing membrane

– Complies with JC/T 690-2008

No.	Parameter		Index
			Ⅰ	Ⅱ
1	Soluble content（g/m²） ≥	3mm	1600
		4mm	2200
2	Heat resistance℃		90
			no slip, flow, or drip
3	Low temperature flexibility℃		-5	-10
			no cracks
4	Water impermeability		0.2 Mpa ， 30min no leakage
5	Maximum tensile strength (N/50mm) ≥	Longitudinal	500	600
		Transverse	400	500
6	Peel strength of joint／ (N/mm)		0.5
7	Heat aging	Tensile retention / % ≥	90
		Low temperature flexibility/ ℃	0	-5
			no cracks
		Mass loss / % ≤	2.0

Application Methods

Torch-applied, cold adhesive, or a combination of both.

The membrane can be applied using torch-applied or cold adhesive alone, or a combined method: cold adhesive for large areas and torch-applied for overlaps.

Torch-applied: Use a flame torch or burner to heat the underside of the membrane and the substrate until the bitumen melts. Roll the membrane forward while heating, then press with a roller to ensure strong bonding to the substrate or to the membrane below.
Cold adhesive: First apply adhesive evenly to the substrate and the membrane. Allow it to dry slightly, then position the membrane. Roll to expel air underneath, making the membrane flat, tight, and firmly bonded.

Tools & Accessories

Substrate cleaning tools: shovels, brooms, dust blowers, hammers, chisels, etc.
Membrane laying tools: scissors, tape measures, chalk line reels, trowels, brushes, rollers.
Specialized torch tools: single or multi-nozzle torches or burners.
Accessories: primer, membrane adhesive, edge sealing strips.

Membrane Laying

Before starting, clean the approved substrate thoroughly. Blow dust off corners and edges.
Apply primer evenly. Do not brush back and forth repeatedly.
After primer dries, apply additional reinforcement layers at locations required by design (e.g., roof details, below-grade waterproofing details).
Determine the laying sequence and direction, then snap chalk lines on the substrate. Lay the membrane according to the following bonding requirements for different areas:
Roof: Spot-bond or strip-bond membrane to substrate. The 800mm perimeter of the roof must be fully bonded. On sloped roofs, bond at least 70% of the area; membrane-to-membrane overlaps must be 100% bonded.
Below-grade slab: Membrane can be fully bonded, spot-bonded, strip-bonded, or loose-laid to the substrate, but membrane-to-membrane overlaps must be fully bonded.
Below-grade walls: Both membrane-to-substrate and membrane-to-membrane must be fully bonded.
Reinforcement layers: Fully bond in general areas; expansion joints may be loose-laid.
Laying sequence: Start with high spans, then low spans. At the same elevation, start far away and work closer. On the same plane, start from the low point.
Roof laying direction:
Slope <3%: Lay parallel to the ridge.
Slope 3% – 15%: Lay either parallel or perpendicular to the ridge.
Slope >15% or when subject to vibration: Lay perpendicular to the ridge.
Lap joints parallel to the ridge: Align with water flow direction. For laps perpendicular to the ridge, align with the prevailing wind direction.

FAQ

A: The primary difference lies in the modifying polymer. APP modified bitumen is modified with Atactic Polypropylene (a type of plastic), which gives the membrane an exceptionally high melting point and superior UV resistance. It is engineered specifically for hot climates (such as the Middle East, Africa, and South Asia) and exposed roofing. SBS modified bitumen uses synthetic rubber, which excels in low-temperature flexibility for colder regions.

A: We manufacture standard industrial specifications, primarily 3mm APP membrane and 4mm thick APP membrane. As a quality-driven manufacturer, we strictly guarantee that the thickness of every batch meets international tolerance standards (ASTM/EN). We never compromise on raw materials or under-gauge our products. Every export shipment undergoes strict caliper inspection before loading, and we can provide testing videos for your peace of mind.

A: We offer three main surface finishes depending on your project’s application:

PE Film / Sand Finish: Ideal for non-exposed applications, underground foundations, or multi-layer roofing systems where a concrete protection layer will be poured over it.
Mineral Finish APP Membrane (Slate Flakes): Specifically designed for exposed roofing systems. The natural mineral granules reflect sunlight and provide ultimate UV protection, meaning the roof can be left exposed without an extra protection layer, significantly lowering the overall app membrane waterproofing cost.

A: Our APP waterproofing sheet is engineered for the torch-applied application method. During installation, a professional propane torch is used to heat the bottom polymer-modified bitumen layer and the substrate. As the PE burn-off film melts, the roll is unrolled and pressed down, creating a continuous, 100% full-bonded, and seamless waterproofing barrier. This robust bonding prevents water tracking underneath the membrane.

A: As a direct factory supplier, our app membrane price is strictly volume-based to help global distributors and contractors win tenders and maximize profit margins. The bulk wholesale price is determined by the specific thickness 3mm vs. 4mm), the reinforcement base (high-tensile Polyester Mat vs. Fiberglass Mat), and the total order volume. Contact our project team with your area square meters (SQM) for a tiered FOB/CIF quote.

A: Yes, we provide full OEM and private label services for regional building material brands. We can customize the roll dimensions and print your company logo directly on the silicon release film or export woven wrapping. Furthermore, we provide complete compliance documentation, including Technical Data Sheets (TDS), MSDS, and Free A4-sized APP membrane samples so your engineering consultants or local testing authorities can verify performance before bulk ordering.