GREAT OCEAN Logo
Request A Quote
JY-APP Modified Bitumen Waterproofing Membrane Modified Asphalt Waterproof Membrane

APP Modified Bitumen Waterproofing Membrane (JY-APP)

Great Ocean APP Modified Bitumen Waterproofing Membrane (JY-APP) is a torch-applied waterproofing membrane manufactured with atactic polypropylene (APP) modified bitumen and reinforced with polyester felt or glass-fiber felt. It is available with PE film, sand, or mineral surface finishes to suit different waterproofing applications.
Designed for good heat resistance and durable waterproofing performance, JY-APP membrane is suitable for roofing, basements, underground structures, and other building waterproofing projects. Standard roll specifications and customized options are available according to project and purchasing requirements.
Contact Great Ocean for current specifications, technical documents, OEM/ODM options, and quotation.

Category:
Request A Quote

Product Introduction

Great Ocean JY-APP Modified Bitumen Waterproofing Membrane is a torch-applied waterproofing sheet made with atactic polypropylene (APP) modified bitumen and reinforced with polyester felt or glass-fiber felt.

APP modification improves the heat resistance of the bitumen compound, making the membrane suitable for roofing and other building waterproofing applications where good high-temperature performance is required.

The membrane is available with different surface finishes, including PE film, sand, and mineral finish. Reinforcement and surface configurations can be selected according to project requirements.

Typical available specifications include:

ItemAvailable Options
Thickness3.0 / 4.0 / 5.0 mm
Roll Length7.5 / 10 m
Width1.0 m
ReinforcementPolyester felt / Glass-fiber felt
Upper SurfacePE film / Sand / Mineral finish
UnderfacePE film / Sand

JY-APP membrane can be used for roofing, underground waterproofing, and other building waterproofing applications.

For confirmed specifications, technical documents, OEM/ODM requirements, and quotation, please contact Great Ocean.

JY-APP Modified Bitumen Waterproofing Membrane

Product Features

  • Good high-temperature resistance: APP modification improves the heat resistance of the bitumen compound, helping the membrane maintain stable performance in warm and high-temperature environments.
  • Reinforced membrane structure: Available with polyester felt or glass-fiber felt reinforcement to provide strength and dimensional stability for different waterproofing applications.
  • Multiple surface options: PE film, sand, and mineral finishes are available to suit different installation methods and project requirements.
  • Reliable waterproofing performance: A tested 3 mm APP Type I membrane achieved no water penetration at 0.3 MPa for 30 minutes, with longitudinal and transverse peak tensile forces of 885 N/50 mm and 856 N/50 mm respectively.
  • Torch-applied installation: Designed for conventional torch application, allowing the membrane to be bonded to prepared substrates using standard modified-bitumen membrane installation methods.
  • Specification flexibility: Different thicknesses, reinforcement options, and surface finishes are available according to project and purchasing requirements.

For confirmed technical data, available specifications, OEM/ODM requirements, and quotation, please contact Great Ocean.

JY-SBS Modified Bitumen Waterproofing Membrane

Third-Party Tested Performance

A JY-APP Type I waterproofing membrane with polyester reinforcement and PE film surface (APP I PY PE PE, 3 mm) was tested by the Shandong Institute for Product Quality Inspection according to GB 18243-2008.

Test ItemRequirementTest Result
Roll Area10.0 ± 0.10 m²10.01–10.04 m²
Mass per Unit Area≥4.0 kg/m²4.2–4.5 kg/m²
Average Thickness≥3.0 mm3.0–3.1 mm
Soluble Matter Content≥2100 g/m²2203 g/m²
Heat Resistance110°C, slide ≤2 mm, no flow or drippingUpper: 0.3 mm / Lower: 0.5 mm, no flow or dripping
Low-Temperature Flexibility-7°C, no cracksNo cracks
Water Impermeability0.3 MPa / 30 min, no penetrationNo penetration
Maximum Peak Tensile Force – Longitudinal≥500 N/50 mm885 N/50 mm
Maximum Peak Tensile Force – Transverse≥500 N/50 mm856 N/50 mm
Peak Elongation – Longitudinal≥25%31%
Peak Elongation – Transverse≥25%35%
Water Immersion Mass Increase≤1.0%0.8%
Peel Strength≥1.0 N/mm1.6 N/mm
Underside Asphalt Coating Thickness≥1.0 mm1.1 mm

Tested specification: APP Type I / PY reinforcement / PE-PE surface / 3 mm
Test report: WJ1300053-2026
Testing organization: Shandong Institute for Product Quality Inspection

Technical performance varies by membrane type, reinforcement, thickness, and surface configuration. Contact Great Ocean for the test report or technical data applicable to your required specification.

Installation Guidelines

JY-APP membranes are torch-applied (propane gas torch). Cold adhesive or hot-mopped asphalt methods are possible for large areas, but torch-on remains the most common practice.

Substrate Preparation

  • Concrete substrate must be clean, dry, structurally sound, and free of dust, oil, or loose particles.
  • Apply bitumen primer evenly and allow full drying (usually 4–6 hours).
  • For underground works, install additional protection board or drainage layer after the membrane if backfill is required.

Laying Sequence

  • Always start from the lowest point and work upward.
  • Side laps: minimum 80 mm (roof) or 100 mm (underground); end laps: minimum 150 mm.
  • Stagger end laps of adjacent rolls by at least 300 mm.
  • Roof slope <3 %: lay parallel to the slope. Slope 3–15 %: lay perpendicular to the slope preferred. Slope >15 % or vertical walls: lay perpendicular and mechanically fix at the top.

Torch Application Steps

  1. Unroll the membrane 1–2 meters and align properly.
  2. Re-roll loosely from both ends toward the center.
  3. Heat the lower PE film evenly with a wide-flame torch until the bitumen surface shows a glossy flow (about 3–5 mm melt layer).
  4. Unroll while torching, pressing firmly with a roller to expel air and ensure full adhesion.
  5. Side and end laps must show a continuous 5–10 mm bitumen bead when properly welded.
  6. Mineral-slate finish rolls: avoid overheating the granules; torch only the overlapping edge.

Special Details

  • Upstands / parapets: carry membrane minimum 150–200 mm above finished floor level and protect with metal flashing.
  • Penetrations (pipes, drains): use pre-formed collars or double-layer reinforcement.
  • Two-layer systems: first layer torch-bonded fully, second layer with staggered joints and partial bonding on mineral surface (if gravel-ballasted).
  • Rock wool or XPS insulation boards: membrane can be directly torched onto compatible boards.

Long & Short Edge Overlap Rules

  • Long edge: ≥80 mm on roofs, ≥100 mm underground.
  • Short edge: ≥150 mm everywhere.
  • When two-layer applications: first layer fully bonded, second layer offset by half roll width.

Safety & Quality Notes

  • Torch flame should never directly touch the polyester carrier – only the PE film.
  • Final inspection: check all seams for continuous bitumen bleed-out.
  • After completion, protect the finished membrane from mechanical damage until protection layer or surfacing is applied.

All standard 3 mm and 4 mm rolls (PY, PYG, sand/mineral/PE finish) are produced in our plant under strict GB 18242-2008 control. Detailed installation manual and video links are sent with every order. For site-specific advice or contractor training, contact us directly.

JY-APP vs JY-SBS Modified Bitumen Waterproofing Membrane

ItemJY-APP (Atactic Polypropylene Modified)JY-SBS (Styrene-Butadiene-Styrene Modified)
Main ModifierRandom polypropylene (APP)SBS elastomer
Heat ResistanceBetter – softening point ≥150°CStandard – softening point 110–120°C
High Temperature Flow ResistanceExcellent – suitable for hot climates (regular roof temperature >80°C)Moderate – can soften in extreme summer heat
Low Temperature Flexibility-5°C to 0°C (PY type) / 0°C to +5°C (G type)Better – usually -20°C to -25°C
Cold Climate PerformanceAcceptable in mild wintersPreferred where temperature drops below 0°C for long periods
UV & Exposed RoofingStandard choice for exposed app roofing systems with mineral slate finishUsually requires additional protection layer or gravel
Typical ApplicationsTropical / subtropical zones, Middle East, North Africa, Southern China, exposed roofsTemperate zones, underground structures, Europe, Northern China, concealed roofs
Elongation at Break30–40%Higher – 800–1500%
Installation MethodTorch-applied (same as SBS)Torch-applied or hot-mopped
Standard ExecutedGB 18242-2008 (APP type)GB 18243-2008 (SBS type)
Common Thickness3mm, 4mm3mm, 4mm
Factory Price Range (2025)Almost the same – APP usually 2–5% higher due to raw material costStandard reference price
Practical Summary for Buyers
  • Choose JY-APP modified bitumen membrane if your project is in hot regions (Brazil Northeast, Middle East, Southeast Asia, Australia) or you need long-term exposed roof without extra protection layer.
  • Choose JY-SBS if the building is in colder areas or the membrane will be covered (ballast, soil, insulation board) and you want maximum crack-bridging ability.

Both products are manufactured in the same Great Ocean Waterproof plant with identical polyester/glass-fiber carriers and quality control. Stock of both types is kept year-round. Send us your project location and whether the roof is exposed – we will recommend the correct type and quote accordingly within 24 hours.

Customer Reviews

Ahmed Al-Mansoori – Dubai, UAE (August 2025) ★★★★☆ “Used 4 mm grey mineral APP on a 9,000 m² warehouse roof. Surface temperature here reaches 85–90 °C in summer. After 14 months including two full summers, no blistering, no flow marks of flowing, seams still perfect. Delivery took 22 days to Jebel Ali, packing was good, only 3 rolls had small edge damage. Price was about 12 % lower than Italian brand we used before.”

Carlos Ramírez – Lima, Peru (June 2025) ★★★★☆ “Bought one 20 ft container of 3 mm sand-finish for residential flat roofs. Material arrived in 38 days to Callao. The rolls are uniform thickness and the torch film melts evenly, crews said easier to install than the local brand we normally buy. So far no callbacks from the 11 buildings we finished in March.”

Joseph Okafor – Lagos, Nigeria (October 2024) ★★★★☆ “Ordered 4 mm polyester with green slate for a shopping mall in Ikeja. Clearing in Lagos took longer than shipping, but goods arrived without water damage. We have heavy rain here; after one rainy season no leaks reported. The mineral granules stay attached well, unlike some cheaper membranes we tried before.”

Ricardo Santos – São Paulo, Brazil (April 2025) ★★★★☆ “Took 650 rolls of 4 mm PE-finish for underground parking garage (two-layer system). The APP compound is stiffer than SBS, but our team prefers it because it doesn’t stick to itself when is hot in the container. Adhesion to concrete after priming was strong. Test samples passed pull-off test >1.5 N/mm².”

Tan Wei Jie – Jakarta, Indonesia (January 2025) ★★★★☆ “Used 3 mm PY sand surface as cap sheet over XPS insulation on factory roof. Roof gets very hot and humid. Nine months in, colour still uniform, no cracking at overlaps. Factory gave us loading photos and test report before shipment – everything matched when goods arrived.”

Frequently Asked Questions – JY-APP Modified Bitumen Waterproofing Membrane

Q1: What is the minimum order quantity (MOQ)? A: One 20ft container (usually 550–650 rolls depending on thickness and surface). LCL orders are accepted but freight cost will be higher.

Q2: What is the current factory price (December 2025)? A: FOB Qingdao price range: – 3 mm polyester sand/PE finish: USD 1.15–1.30 per m² – 4 mm polyester mineral slate finish: USD 1.75–1.95 per m² Exact price depends on quantity, surface color, and raw material index. Send us your specification for a quotation valid 7 days.

Q3: How many rolls can be loaded in a container? A: – 20ft GP: 550–650 rolls (palletized or vertical) – 40ft HQ: 1100–1300 rolls We provide free loading photos before shipment.

Q4: What is the lead time? A: Stock specifications ship within 7–10 days after deposit. Custom mineral color or private label: 15–20 days.

Q5: What certificates do you provide? A: Every shipment comes with – Factory test report according to GB 18242-2008 – SGS/Intertek third-party test report (optional, extra cost) – Certificate of Origin & Fumigation certificate if required

Q6: What is the warranty period? A: 10-year material warranty for polyester base, 12-year for mineral slate finish when installed according to our guidelines.

Q7: Can you print our own brand/logo on the rolls? A: Yes, free private label printing (your logo on PE film and carton label) for orders ≥5 containers. Smaller orders: USD 150–200 printing fee.

Q8: Can we get free samples? A: Yes – one A4 size or half-meter sample piece is free (courier fee collect). Full 1×10 m sample roll cost will be deducted from first container order.

Q9: How long does it take to ship to Middle East / Africa / South America? A: – Dubai / Jeddah: 18–25 days – Lagos / Mombasa: 35–45 days – Santos Brazil / Buenos Aires: 35–40 days

Q10: What is the difference between APP and SBS membrane? A: APP is designed for hot climates (softening point >150 °C), ideal for exposed roofing in summer temperatures >80 °C. SBS offers better flexibility at low temperatures (down to -25 °C) and is normally used in colder regions or underground works.

Q11: Do you supply bitumen primer and accessories? A: Yes – solvent-based and water-based bitumen primer, aluminium flashing tape, and protection board are available from the same factory.

great ocean waterproof factory

About the Manufacturer – Great Ocean Waterproof Technology Co., Ltd.

Great Ocean Waterproof Technology Co., Ltd. (formerly Weifang Great Ocean New Waterproof Material Co., Ltd.) was established in 1999 and is located in Taitou Town, Shouguang City – the largest waterproof material production base in China.

Factory covers 26,000 m² and operates multiple modern production lines for waterproof membranes, sheets and coatings, including the complete JY-951 Waterborne Polyurethane Waterproof Coating series. We produce over 40 product categories ranging from modified bitumen and TPO/PVC membranes to polymer cement (JS), single-component and dual-component polyurethane coatings, non-curing rubber asphalt coatings and root-resistant membranes.

The plant is equipped with automatic coating lines, high-speed mixers, laboratory reactors and full quality-control testing facilities. All products, including JY-951 water-based polyurethane coating, are manufactured under ISO 9001 quality management system and have passed national CRCC railway certification, Ministry of Agriculture quality compliance and Shandong Province industrial product filing.

Our materials are widely used across more than 20 provinces in China and exported to the Middle East, Southeast Asia, Africa, South America and CIS countries. We keep large stock of standard specifications and offer stable factory-direct pricing year-round.

Great Ocean Waterproof maintains the principle of “integrity, practicality and innovation” and focuses on delivering reliable, cost-effective waterproofing solutions with professional pre- and after-sales support.

For factory visit, third-party inspection arrangement or latest price list of JY-951 Waterborne Polyurethane Waterproof Coating, please contact us directly – we reply within 12 hours.

certification

Category:

Related products