How to Replace and Install Marine Rubber Fenders

Introduction

Marine rubber fenders are essential components for protecting vessels, docks, and piers from collision damage during berthing and mooring. Over time, continuous exposure to saltwater, sunlight, and mechanical stress can reduce their elasticity and impact resistance. Knowing when and how to replace fenders ensures optimal safety, minimizes repair costs, and extends the lifespan of both vessels and port structures.

When Should You Replace Marine Rubber Fenders?

Regular inspection is key to identifying early signs of deterioration. Replacement is necessary when you observe:

Loss of elasticity or poor impact absorption: The fender no longer rebounds effectively after contact.

Cracks, cuts, or surface peeling: Often caused by UV degradation or aging rubber.

Permanent deformation or detachment: Indicates internal structural failure.

Corroded or loose fasteners: May compromise stability during docking operations.

Timely replacement avoids accidents and helps maintain the vessel’s performance and safety standards.

Tools and Materials You’ll Need

Before beginning installation, prepare all necessary tools and materials to ensure a smooth and efficient process:

Measuring tape and chalk marker

Electric drill with stainless-steel bits

Cleaning brush and air blower

Acetone or marine surface cleaner

Marine-grade adhesive or epoxy sealant

Bolts, washers, and stainless-steel nuts

Protective gloves and safety gear

Step-by-Step Fender Replacement and Installation

1. Remove the Old Fender

Use the appropriate tools to unscrew the bolts and gently detach the old fender. If adhesive residue remains, clean it thoroughly using acetone or a scraper to achieve a smooth surface.

2. Measure and Mark the Mounting Positions

Accurate measurement is essential for alignment. Mark drilling points according to the new fender’s specifications and confirm the spacing matches the manufacturer’s recommendation.

3. Drill Mounting Holes

Drill holes along the marked positions. Ensure the hole diameter fits the bolt size to guarantee a tight and secure installation.

4. Clean and Prepare the Surface

Remove any rust, paint, or dust using a brush or air blower. A clean surface ensures better adhesion and corrosion resistance.

5. Apply Adhesive or Sealant

Spread marine-grade adhesive evenly on the contact surface. This step prevents water intrusion and enhances stability under heavy impact.

6. Mount the New Fender

Align the holes carefully and insert the bolts. Use washers and nuts to secure the fender evenly from both ends.

7. Tighten and Inspect

Tighten all bolts gradually to avoid uneven pressure or deformation. After installation, inspect the alignment, firmness, and sealing condition to confirm proper placement.

Pro Tips for Better Installation

Always use stainless-steel fasteners for corrosion resistance.

Avoid over-tightening, as excessive pressure may cause cracks in the rubber body.

Apply UV-resistant coating if the fenders are exposed to sunlight for extended periods.

Perform routine checks after installation to ensure stability and safety.

Fender Install Video：https://www.youtube.com/watch?v=2bkY_UcZYKY

Conclusion

Replacing and installing marine rubber fenders correctly is essential for protecting both ships and docks. A well-executed installation enhances energy absorption, reduces maintenance costs, and ensures safe berthing operations. With proper tools, accurate measurements, and careful installation techniques, you can maximize the lifespan and efficiency of your fender system—keeping your marine operations safe and reliable for years to come.