PENNSWELL is a kind of flexible, hydrophilic swelling, and synthetic water-stop strip based on rubbercompound, offer long life performance in concrete structures against water leakages.
PENNSWELL B- A kind black color putty-type swellable hydrophlic water-stop strip.
PENNSWELL P-A kind red color preformed-type swellable hycrophilic water-stop strip.
| Model |
Color |
Width |
Length |
Thickness |
| PENNSWELL B |
Black |
5mm-40mm |
5m/10m |
5-40mm |
| PENNSWELL P |
Red |
5mm-40mm |
5m/10m |
5-40mm |


· Highly effective waterproofing: It expands rapidly upon contact with water, can tightly fill various gaps to form a sealing barrier, with excellent waterproofing performance and high pressure resistance;
· Self-healing function: It can continuously expand to seal new gaps caused by building settlement, ensuring waterproofing effectiveness;
· Stable and durable characteristics: Even after long-term immersion in water, it can still effectively perform waterproofing functions, has strong resistance to aging, and has a long service life;
· Good construction compatibility: It is in the form of putty, with a soft texture and strong plasticity, can fit complex and irregular surfaces, adapt to different gap shapes and sizes, and is easy to install, without the need for special equipment or complex processes, with high construction efficiency.

· In the field of underground engineering: applicable to the joint of pipe segments in subway tunnels, the construction joints of connecting passages, as well as the segmented connection joints and deformation joints of underground utility tunnels; in the joints where the walls and floor of basements and civil defense projects meet, and in the post-pour strip sections, it can effectively prevent groundwater infiltration and ensure the dryness of underground spaces.
· In the field of water conservancy and hydropower engineering: can be used for the transverse and longitudinal joints of dam bodies, the joint of anti-seepage bodies of reservoir embankments, as well as the interface sealing of water supply pipelines and aqueducts; it is also applicable to the construction joints of water tanks and water treatment plants, preventing water body leakage that causes structural damage.
· In the fields of industrial and civil buildings: in the equipment foundations and expansion joints of concrete floor slabs of industrial plants, as well as the joint of roof parapets and bathroom pipe penetrations through floor slabs and the post-pour strip sections of exterior walls in civil buildings, it can specifically solve the leakage problems caused by settlement or temperature changes in building structures.
· In the field of transportation engineering: applicable to the connection joints of piers and foundations of bridges, the expansion joints of bridge decks, as well as the circumferential construction joints at the entrances of culverts and tunnels, which can resist the erosion of rainwater and groundwater on transportation structures, and extend the service life of the projects.
· Special engineering fields: In scenarios such as the joint sealing of the anti-seepage layers in sewage treatment plants and landfill sites, as well as the construction joints of concrete anti-seepage walls in chemical storage areas where there are corrosive or special environmental requirements, its excellent aging resistance, environmental friendliness and reliable water-stop performance can also play a significant role.


Our factory boasts advanced production technology and equipment for top-tier R&D and quality control.
Key benefits include:
1. Advanced Technology: Utilizes leading international production methods to maintain highquality waterproof coils.
2. Product Diversity: Offers a range of waterproof membranes like PVC, HDPE, EPDM, TPO types for various projects.
3. Quality Management: Implements a rigorous system to monitor every stage from raw materials to finished products.
4. Highly Customization: Provides tailored solutions based on customer needs for specific waterproof coil specs.
5. Expert Team: Comprised of seasoned engineers and technicians dedicated to product improvement and customer satisfaction.
6. Global Reach: Our products serve construction projects globally.

PENNFOX Co., Ltd. is a professional manufacturer specializing in tunnel waterproofing materials, water-stopping materials and related accessories, we have been dedicated to becoming a reliable partner for global clients in the tunnel construction industry.
Firstly, to build a one-stop procurement platform for tunnel waterproofing materials and accessories. This platform integrates a full range of necessary products, allowing customers to complete all purchases in one place, greatly saving time and simplifying the procurement process.
Secondly, to provide professional tunnel waterproofing system solutions-we do not only supply products, but also combine our industry expertise to offer tailored solutions that address the specific waterproofing challenges of different tunnel projects.
A defining advantage of PENNFOX's products is their high customizability. We fully understand that every waterproofing project has unique requirements, which may stem from factors such as geological conditions of the tunnel site, project design standards, and specific functional needs of customers, therefore, we offer flexible customization services: based on customers' detailed requirements to develop and manufacture products that perfectly match their project demands, ensuring optimal waterproofing effects for each project.
In the future, PENNFOX Co., Ltd will strictly follow our slogan "Credit, Quality and Service create the bright future" and offer the best materials and service for customers.


1. Q: Are you trading company or manufacturer?
A: We are manufacturer.
2. Q: How long is your delivery time?
A: Generally it is 5-7 work days after deposit and depends on your quantity.
3. Q: Do you provide samples?
A: Yes, free sample is available. Before cooperation, delivery cost needs to be paid by customer, but it can be deducted in future orders.
4. Can You Make Our Design Or Put Our Logo On The Product?
A: Yes,We support OEM & ODM, your art work labels can be sticked on cargo packages.
5. Q:How do you ensure the quality?
A:We are working with there QC processes to guarantee the quality:
1) For raw materials;
2) Onsite inspection during production;
3) Final QC test for each batch of finished products.