
Product Introduction
Bitumen, often recognized as asphalt, is a dense, black, and highly viscous liquid or semi-solid derived from petroleum. Celebrated for its remarkable waterproofing properties, it is extensively utilized in the construction industry. Bituminous membranes are ideal for waterproofing applications on roofs, basements, underground structures, bridges, and many other constructions. Predominantly, there are two main application techniques for bitumen membranes.
One is the Torch-on method, and the other is Self-adhesive.
Torch-on bituminous membranes are a versatile and straightforward solution for all weather conditions. Once the CHENHUA membranes are applied, they form a seamless, watertight barrier that is securely bonded to the surface.
Top cover |
Polyethylene Film or other films |
Sand or other granular |
Popular thickness |
3mm 4mm 5mm |
3mm 4mm 5mm |
Reinforcement |
PY or Fiberglass |
PY or Fiberglass |
Size/roll |
1mx10m ,1mx8m ,1mx7.5m |
1mx10m, 1mx8m, 1mx7.5m |

Torch Down Bitumen Waterproof Membranes are extensively used across various building grades for waterproofing and seepage-proofing projects. Suitable for both exposed and concealed areas, these include flat roofs, sloped roofs, underground spaces, tunnels, bridges, parking lots, reservoirs, and more.
Application method:
1. Substrate:
Ensure that the substrate is meticulously clean, dry, and free from all forms of contaminants, prepared to perfection.
All dust and loose, friable materials must be thoroughly eradicated.
Blowholes and voids should be completely exposed and subsequently repaired.
2. Primer:
Apply primer before laying the membrane. Clean the substrate with a dust catcher or blower and then coat it thoroughly with a treatment primer to ensure waterproofing, ensuring effective dust consolidation and enhanced adhesion.
3. Membrane placement:
*Carefully unroll the torch-on membrane and align it precisely before initiating torching or bonding.
*Each membrane must be laid in parallel, staggered by at least 1 meter to prevent coinciding joints.
*The end-to-end overlaps must be alternated, never positioned along a single line.
*Always commence at the lowest slope height, starting with drains, downpipes, or other details.
*During torching, heat both the membrane and the substrate simultaneously, focusing on the roll and overlapping areas.
*Overlaps must be welded with precision, ensuring a thin trickle of melted mixture, approximately 1 cm wide, appears along the overlap line.
4.Utilize a roller to firmly press down the membrane surface, guaranteeing a secure adhesion.
Attention:
1. Ensure the substrate is dry and clean. Avoid working on rainy or snowy days.
2. Refrain from working in heavy winds (above grade 5).
3. Not suitable for construction below 5°C.
4. If rain or snow occurs during construction, protective measures for the laid membrane are essential.
5. All personnel must wear special uniforms for safety during installation. Fire control equipment is essential.

Packing and shipping:
1. Store membranes in dry, well-ventilated conditions.
2. Different membrane types must be stored separately.
3. Under normal conditions, the storage period is one year from the production date.
4. Membrane rolls should be stored vertically during transportation and be protected from sunlight and rain.
With pallet |
Seaworthy plywood pallet packing, 20pallets/20ft container |
Without pallet |
Plastic bag per roll, common or OEM with customer brand |

1) What's the popular size for Torch-on bitumen membrane?
-3mm x 1m x 10m with PE or sand granular top.
Experience top-tier waterproofing with our -4mm x 1m x 10m Torch On Bitumen Membrane, available with either a PE or sand granular top for superior protection.
2) What's the fundamental difference between SBS and APP?
Unleash the power of specialized modifiers: SBS and APP. SBS modifiers are engineered to significantly enhance cold resistance, making them the perfect ally for waterproof membranes in chilly climates. On the other hand, APP modifiers are crafted to dramatically boost the heat resistance of membranes. While their appearances may be identical, their functional differences offer unique solutions for various environmental challenges.
3) Is OEM available?
Absolutely! Embrace the opportunity to explore our exceptional OEM services, where customization is at your fingertips, anytime.
Simply share your logo, and we will craft a bespoke design tailored to your vision. Alternatively, send us your completed design, and we will elegantly print it on PE film, ensuring it's beautifully packaged and delivered right to your doorstep.
4) Are you a factory?
Indeed, Shandong Chenhua Waterproof Co., Ltd. stands as a seasoned, professional factory since 1994, nestled in the esteemed China Waterproof Town, Taitou. We specialize in a diverse array of waterproof materials, expertly catering to a wide range of waterproofing needs for both hidden and exposed substrates.
5) What is the delivery time?
Our efficient process typically ensures order completion within 10 days post-confirmation. However, please be aware that delivery times may be influenced by specific requirements and the quantity of your order.
