SeaGuard Foam Filled Fenders

Hongruntong Marine supplies premium Seaguard fenders and foam fenders marine — including foam filled fenders and foam boat fenders — engineered for superior energy absorption, low permanent deformation and long service life. Technical datasheets, custom sizes and global delivery available.

 

 

SeaGuard foam filled fenders from Hongruntong Marine provide unsinkable buoyancy, high energy absorption and low maintenance for marinas, ports and offshore berths. Custom sizes, chain & tyre net options and third-party testing available.

 

Hongruntong Marine manufactures industry-grade Seaguard fenders and a comprehensive range of foam fenders marine, including standard and custom foam filled fenders and foam boat fenders. Designed for marinas, commercial ports, offshore berthing and ship-to-ship operations, our fenders combine closed-cell foam cores, reinforced skins and precision moulding to deliver consistent energy absorption, minimal permanent deformation and excellent environmental resistance.

 

 

Key Features & Benefits

 

• Unsinkable & Predictable Performance: closed-cell PE core guarantees constant buoyancy and consistent EA (energy absorption) over time.

• Enhanced Structural Strength: continuous nylon filament reinforcement prevents delamination and improves resistance to high local stresses and repeated impacts.

• Long Service Life in Harsh Environments: PU outer skin is UV-stabilized and non-marking, resisting abrasion, fouling and chemical exposure.

• Low Maintenance: no inflation required; durable materials reduce inspection and repair cycles.

• Hull-friendly Protection: non-marking outer surface protects paint and coatings on pleasure and commercial craft.

• Customizable Performance: foam density, filament layout and outer skin thickness can be adjusted to meet specific EA, reaction force and deflection targets.

 

 

Applications

 

• Quay, pier and marina berthing protection

• Ship-to-ship (STS) operations and lightering

• Ferry ramps, RO-RO berths and floating pontoons

• Offshore platforms, FPSOs and service vessels

• Naval and commercial vessel side protection

 

 

Construction

 

• Inner core — Closed-cell Polyethylene (PE) foam: provides permanent buoyancy, prevents water ingress and delivers stable, repeatable compression characteristics for energy absorption.

• Middle reinforcement — Continuous nylon filament embedded in a polyurethane (PU) skin: a structural reinforcement layer that dramatically increases shear strength, tearing resistance and overall load distribution while preserving flexibility.

• Outer wear surface — UV-resistant, non-marking polyurethane: abrasion-resistant outer jacket that resists cutting, oil and saltwater, protects the reinforcement layer, and keeps vessel hulls clean (non-marking).

 

 

Fender Structure

 

There are two types of fender structures available for selection.

 

 

Foam Fenders – Product Material Tables

 

 

Standard Foam Material Properties

Test Item	Test Method	Required Value
Density	ASTM D-3575  Suffix W	62 kg / cu m  (+/-10%)
Tensile strength	ASTM D-3575  Suffix T	289 kPa Min.
Elongation	ASTM D-3575  Suffix T	95 % Min.
Tear resistance	ASTM D-3575  Suffix G	2.2 kN/m Min.
Compressive strength	ASTM D-3575  Suffix D
10% deflection		27 kPa Min.
25% deflection		48 kPa Min.
40% deflection		77 kPa Min.
50% deflection		110 kPa Min.
Compression set average	ASTM D-3575  Suffix B	17.2%
Thermal stability	ASTM D-3575  Suffix S	<0.5 % change (24 hrs at 70 deg C)
Water absorption	ASTM D-3575  Suffix L	<0.34 kg / sq m (skived)
Flammability	FMVSS302	Pass
	PPP-C-1752B	-54 deg c to 99 deg C

 

Polyurethane Elastomer Skin Material Property Requirements

Test Item	Test Method	Required Value
Shore A durometer hardness	ASTM D-2240	75-95
Tensile strength	ASTM D-412	13.8 MPa Min.
Elongation	ASTM D-412	300% Min.
Tear strength	ASTM D-624	32.4 kN/m Min.
Flex life (ross)	ASTM D-1052	100,000 cycles Min. break
Abrasion resistance (NBS)	ASTM D-1630	100

 

Nylon Filament Reinforcement Material Property Requirements

Test Item	Test Method	Required Value
Nylon cord weight	ASTM D-885	0.280 g/m avg.
Breaking strength	ASTM D-885	231 N avg.
Elongation (ultimate)	ASTM D-885	16% avg.

 

Nylon Filament Reinforced Elastomer Skin Material Property Requirements

Test Item	Test Method	Required Value
Tensile strength	ASTM D-412	31.0 Mpa Min.
Elongation	ASTM D-412	16% Min.
Tear strength	ASTM D-624	78.8 kN/m Min.

 

 

Dimensions

 

Fender Size D x L [mm]	Low Capacity		Standard Capacity		High Capacity
	Energy [kNm]	Reaction [kN]	Energy [kNm]	Reaction [kN]	Energy [kNm]	Reaction [kN]
700 x 1,500	20	78	29	133	39	174
1,000 x 1,500	28	128	49	174	62	227
1,000 x 2,000	41	147	68	254	88	329
1,200 x 2,000	54	167	91	280	118	365
1,350 x 2,500	91	245	152	418	198	543
1,500 x 3,000	140	343	232	578	301	752
1,700 x 3,000	170	369	282	619	366	805
2,000 x 3,500	273	507	455	845	592	1099
2,000 x 4,000	324	605	540	1006	701	1308
2,000 x 4,500	374	699	624	1161	811	1508
2,500 x 4,000	455	716	802	1197	1042	1557
2,500 x 5,500	720	1072	1201	1789	1562	2327
3,000 x 4,900	859	1063	1431	1508	1861	2309
3,000 x 6,000	1111	1379	1852	2296	2408	2986
3,300 x 4,500	900	1015	1499	1691	1950	2198
3,300 x 6,500	1454	1638	2423	2732	3150	3551

*Other non-standard sizes can be customized according to requirements without mold cost.

 

 

Generic Performance Curve

 

Detailed Photos

 

 

 

Why Choose Hongruntong Marine?

 

• Specialized expertise: Years of focused experience in marine fender design and production.

• Custom engineering capability: In-house tooling and engineering for client-specific foam filled fenders.

• End-to-end support: From specification and CFD-informed recommendations to delivery and on-site technical support.

• Global supply chain: Reliable production scheduling and international logistics to serve projects worldwide.

• Competitive lead times: Optimized manufacturing workflows help meet tight project schedules.

 

 

Quality Assurance & Testing

 

• Material traceability for PE foam, nylon filament and PU compounds.

• Factory dimensional checks and visual inspection on every unit.

• Mechanical tests (compression/EA) and ageing/UV resistance testing available on request.

• Third-party inspection and certification supported for project tenders and class approvals.

 

 

Technical & Custom Options

 

• Foam densities: selectable to tune energy absorption and stiffness.

• Filament reinforcement patterns: continuous wrap, axial or helical layouts to suit load paths.

• PU skin thickness & formulation: tailored for abrasion resistance, chemical tolerance and non-marking performance.

• Attachment & protection: chain/tyre nets, padeyes, backing plates or rope/chain lashing options available.

• Sizes: standard and bespoke diameters/lengths to match vessel classes from small craft to VLCCs.

 

 

Frequently Asked Questions (FAQ)

 

Q: What makes SeaGuard foam filled fenders superior to pneumatic fenders?
A: SeaGuard fenders offer permanent buoyancy and eliminate maintenance needs. They cannot deflate or sink, ensuring uninterrupted protection.

 

Q: Are SeaGuard fenders suitable for heavy commercial use?
A: Yes. Our foam fenders marine are built with reinforced shells and high-density foam to withstand demanding industrial environments.

 

Q: Can I request customized foam boat fenders?
A: Absolutely. Hongruntong Marine provides customization services for size, shape, and performance specifications.

 

Q: Do you offer warranties and after-sales support?
A: Hongruntong Marine offers warranty terms consistent with the product specification and application. After-sales support includes installation guidance, spare parts and repair options.

 

Q: How are the fenders installed and maintained?
A: Installation depends on fender type and mounting system; we provide installation manuals and can supply training or on-site technical assistance. Routine inspection for surface damage, attachment fittings and deformation is recommended to ensure long service life.

 

Q: What lead times and shipping options are available?
A: Lead times depend on configuration and order quantity. We support standard and expedited manufacturing schedules and coordinate global logistics including sea and air freight.