Square Fenders
Hongruntong Marine manufactures heavy-duty square fenders for boats & docks. Our square rubber fenders provide maximum protection with enhanced surface contact. Get quotes now.

Hongruntong Marine specializes in manufacturing high-performance square fenders designed for optimal marine protection. Our comprehensive product range includes specialized square fenders for boats and robust square dock fenders, all crafted from premium square rubber fenders to deliver superior impact absorption and durability. These square fender boat solutions are engineered to provide reliable protection for both vessels and marine infrastructure.
Hongruntong Marine’s Square Rubber Fenders are engineered to deliver compact, high-performance protection for berthing points where space, repeat contact and predictable load distribution matter. Ideal as square fenders for boats, square fender boat solutions or square dock fenders, our products combine a robust rubber compound with optimized geometry to reduce hull damage and protect quay structures in busy ports, marinas and offshore facilities.
Key Features
Enhanced Surface Contact
The unique square design of our square fenders provides 40% more contact area compared to traditional cylindrical fenders, ensuring better weight distribution and improved protection during berthing operations.
Superior Stability
Our square fender boat products feature a flat-sided geometry that prevents rolling and maintains consistent positioning, offering reliable performance in various tidal conditions and weather situations.
Heavy-Duty Construction
Manufactured from high-grade square rubber fenders with reinforced internal structure, these fenders withstand extreme compression and maintain integrity under heavy impact loads.
Multi-Directional Protection
The symmetrical design of our square dock fenders allows for versatile installation options, providing effective protection from multiple angles and directions.
Applications
Ports & Terminals: Protect quay walls from ship collisions during cargo loading.
Marina berths and leisure craft moorings (square fenders for boats).
Commercial quay walls and ferry ramps.
Pontoon edges and floating platforms.
Coastal workboats, pilot boats and service vessels.
Retrofit projects replacing worn or damaged dock bumpers.
Dimensions

| Type |
H [mm] |
W [mm] |
B [mm] |
C [mm] |
D [mm] |
E [mm] |
| HM-SF100 | 100 | 100 | 25 | 30 | 15 | 25 |
| HM-SF150 | 150 | 150 | 38 | 40 | 20 | 30 |
| HM-SF200 | 200 | 200 | 50 | 50 | 25 | 45 |
| HM-SF250 | 250 | 250 | 62 | 60 | 30 | 50 |
| HM-SF300 | 300 | 300 | 62 | 60 | 30 | 50 |
| HM-SF350 | 350 | 350 | 75 | 75 | 30 | 60 |
| HM-SF400 | 400 | 400 | 100 | 75 | 35 | 80 |
| HM-SF500 | 500 | 500 | 125 | 90 | 45 | 90 |
Detailed Photos





Why Choose Our Square Fender?
Proven manufacturing expertise: consistent quality control and repeatable production processes.
Customization & flexibility: sizes, shore hardness and mounting options tailored to project needs.
Competitive commercial terms: transparent pricing, volume discounts and quick lead times.
Technical support: selection advice, installation guidance and on-site support where required.
Global supply capability: experience supplying marinas, commercial ports and offshore projects worldwide.
Quality & Service
Incoming material inspection — all rubber compounds and hardware are checked on receipt for batch conformity and material certificates.
Dimensional & visual checks — each fender is measured and visually inspected at key production stages.
Performance testing — selected units undergo energy-absorption, hardness and compression recovery tests per project requirements.
Traceability & documentation — batch numbers, material certificates and QC reports are issued with every shipment.
Protective packing for sea freight — packaged to prevent damage during handling and long-distance transport.
Warranty terms — standard warranty and extended options available; specific terms provided on quotation.
Spare parts & refurbishment — outer-skin replacement, fastening hardware and refurbishment services offered to extend service life.
Technical support — pre-sales selection advice, installation guidance and post-sale troubleshooting from our engineering team.
On-site support — installation supervision and commissioning assistance available on request for project orders.
After-sales response — dedicated service contact for rapid response to warranty claims, maintenance queries and replacement orders.
Compliance & certification — products manufactured under controlled QA processes; certificates of conformity or test reports supplied on request.
Installation & maintenance guidance
Installation: follow supplied mounting layout; use corrosion-resistant fixings and ensure fender faces align with expected rubbing planes.
Inspection: visual check quarterly (or per operational schedule) for cuts, severe abrasion or anchor hardware wear.
Maintenance: clean with fresh water; patch minor surface damage promptly. Major wear may require outer skin replacement or unit swap.
Refurbishment: Hongruntong Marine offers refurbishment options for outer skins and fastener replacement.
Frequently Asked Questions
Q: What are the main advantages of square fenders?
A: Square design provides stable contact surface and even force distribution.
Q: Are these square rubber fenders suitable for saltwater environments?
A: Yes, they are specifically designed for marine conditions.
Q: What sizes are available for square fenders for boats?
A: We offer standard sizes from 200x200mm to 1000x1000mm, with custom sizes available.
Q: How do I install square dock fenders?
A: Multiple mounting options include rope hanging, chain fastening, or direct bolting.
Q: What is the warranty period?
A: Standard 3-year warranty against manufacturing defects.