PENNMASTIC is a kind of one-component and fast-curing polyurethane sealant. The sealant is black or grey creamy and apply by extruded. It will not sag after filling the vertical joints and top seams. The curing layer is elastic and bonding well with metal, rubber, wood, glass and cement concrete.
| Model |
Expandability |
Package |
| PENNMASTIC EP600 |
Expansive |
600ml |
| PENNMASTIC P600 |
Non-Expansive |
600ml |


· Strong waterproof sealing: It can closely adhere to concrete, metal and other substrates, forming a seamless waterproof membrane that effectively prevents rainwater, groundwater and moisture from penetrating;
· Excellent adhesion: It firmly bonds various materials, ensuring that the joint remains firmly attached and does not leak over a long period;
· Outstanding weather resistance: Resistant to high and low temperatures, ultraviolet rays and aging, maintaining waterproof performance without deterioration in outdoor use over a long period;
· Good elasticity: It can deform along with the thermal expansion and contraction of the substrate, avoiding cracking and maintaining long-lasting waterproof effect;
· Convenient construction: Easy to extrude and shape, adaptable to complex gaps, and with a moderate curing speed, improving construction efficiency.

· Building roof: Seal the cracks and joints of the roof to prevent rainwater from penetrating;
· Door and window installation: Fill the gaps in the window frames to prevent rainwater from seeping into the interior;
· Pipe connection: Seal the pipe interfaces to prevent fluid leakage and the intrusion of external rainwater;
· Basement construction: Fill the wall cracks to block the infiltration of groundwater.


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.