Repairing Guides

how to repair a drilled hole in a fiberglass boat

by Jadon Osinski Published 2 years ago Updated 2 years ago
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Fixing A Drilled Hole In A Fiberglass Boat: Step by Step Guide

  • Materials you Need
  • Equipment & Tools
  • Procedure. Cut a ziplock bag open to make two little square pieces that will cover the hole and around four inches of the surrounding area.
  • Helpful Tips. Use a countersink drill bit to create a conical wall in the hole, to help epoxy bind well. ...

Part of a video titled How to easily fix drilled holes in fiberglass - YouTube
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We're going to use a fiberglass putty you can use gorilla hair you can use a bondo i happen to likeMoreWe're going to use a fiberglass putty you can use gorilla hair you can use a bondo i happen to like the bondo. It's you got to get the right one you have to get the one made for fiberglass.

Full Answer

How to fix a leak in a fiberglass boat?

sanding the boat hull Can Fiberglass Boats Be Repaired With Flex Seal? Flex Seal is hugely popular and it may even be possible to fix a minor leak onboard. Unfortunately, this is not a long-term repair solution. Flex Seal, while can be useful for minor leaks, is a temporary fix.

How do you repair fiberglass damage to a boat?

How do you repair fiberglass damage on a boat? Fill any deep gouges and spend your time sanding out scratches while the filler sets up. Apply gel coat to the filled gouges and finish to the scratches and then final-sand the filled gouges. Buff all the repaired areas and then the rest of the boat. Apply any graphics to finish up.

How to repair deep cracks in fiberglass boats?

Required Tools for this Boat Fiberglass Repair Project

  • Heat gun
  • Rotary tool
  • Safety glasses
  • Sanding block

How to rebuild the transom on a fiberglass boat?

How to Rebuild the Transom on a Fiberglass Boat

  • Take Plenty of Pictures First! Before you get started make sure you take a few pictures of your transom from numerous different angles.
  • Now De-Skin it! ...
  • Now the Fun begins! ...
  • Create a Template to Cut Out the New One. ...
  • Getting it Ready. ...
  • Glassing it Onto the Hull. ...
  • Filleting and Tabbing. ...
  • Cutout Your Holes. ...
  • Cover The Inside with Fiberglass. ...

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How do I fix a hole in my Fibreglass?

1:307:00How to Repair Fiberglass - YouTubeYouTubeStart of suggested clipEnd of suggested clipThis is called the scarf. This piece of fiberglass is 1/4 inch thick. So we will grind a taper threeMoreThis is called the scarf. This piece of fiberglass is 1/4 inch thick. So we will grind a taper three inches out from the hole. Be sure to wear breathing.

What to use to fill a hole in a boat?

7:4112:09How to Fix a Hole in Your Boat DIY (Below the Waterline) - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd let's fill this hole with epoxy. All right so with this thickened epoxy adhesive let's removeMoreAnd let's fill this hole with epoxy. All right so with this thickened epoxy adhesive let's remove this mixing spout. And then pop the cap. Off. And then tighten the mixing spout back on.

How do you fill screw holes in a fiberglass boat?

1:204:44How to easily fix drilled holes in fiberglass - YouTubeYouTubeStart of suggested clipEnd of suggested clipWe're going to use a fiberglass putty you can use gorilla hair you can use a bondo i happen to likeMoreWe're going to use a fiberglass putty you can use gorilla hair you can use a bondo i happen to like the bondo. It's you got to get the right one you have to get the one made for fiberglass.

What do you use to fill holes in fiberglass boats?

6:429:08Part 3 - How to Repair Screw Holes in a Fiberglass Boat. - YouTubeYouTubeStart of suggested clipEnd of suggested clipI can safely fill these holes with thickened epoxy resin inject the thickened mixture into the hole.MoreI can safely fill these holes with thickened epoxy resin inject the thickened mixture into the hole. Mix additional epoxy as necessary to fill the hole. Clean the excess epoxy away with the mixing.

How to repair a hole in a wall?

First, examine the hole and look for cracks and chips extending out from the hole. Use a marker to circle the entire damaged area. Making sure to include the cracked spots. Next, take a saw and cut out the damaged area that you’ve circled with the marker.

How much does it cost to repair fiberglass?

The cost to repair fiberglass and gelcoat will vary depending on how much damage is done. Typically this cost could range from $75 to $125, per hour in most places. Again depending on how severe the damage is, this could take anywhere from a few hours, to several hours. For example, chips and gouges can take a few hours, ...

What is gelcoat on a boat?

The gelcoat on a boat is the outer surface layer on a fiberglass boat hull, which is designed to protect the bottom layers of fiberglass, and give your boat that color and shine finish. The gelcoat is made up of special polyester resin and fiberglass, or epoxy resin which is typically used with carbon fiber for extra strength and water-resistance.

What is a West System 105 K fiberglass repair kit?

If your fiberglass repair is not too big, you can get away with buying a repair kit to fix the problem yourself. There is a fiberglass repair kit on Amazon called West System 105-K Fiberglass Boat Repair Kit that is great for repairing cracks, scraps, gelcoat blisters, loose hardware, damaged keels and smaller holes under 1″ in diameter. The package comes with everything you will need to perform the repair, as well as detailed instructions on how to use the product.

Why does my gelcoat crack?

You might notice that over time your gelcoat might start to show ‘spider web’ looking cracks which would indicate a weakness in the underlying fiberglass. Another problem you might notice with the gelcoat is blistering, which generally means that there is a water intrusion under the gelcoat itself.

How to apply gelcoat to scratch?

Before you start to apply the gelcoat paste to the scratch, take a screwdriver and run it down the scratch to open it up a little wider into a V shape. The reason for this is because the gelcoat paste is very thin and if it’s applied over the scratch then it’ll just end up forming a bridge over the scratch leaving a void under the newly applied gelcoat paste.

How long does it take for resin to harden?

It’s better to add too little than too much hardener. The mix shouldn’t start to harden in less than 30 minutes. Hardening should take about two hours.

How to Patch a Fiberglass Hole

Let’s be clear—if there’s a hole in your fiberglass and a hole that goes deeper into the structure of your boat, you may need repairs that go beyond the scope of this article. That’s when it’s time to consult a professional who can give you an estimate on what it will take to restore your craft.

The Tools

The first step is to acquire a fiberglass repair kit. It should include the materials you need to patch the hole, but you must also have the following tools to apply it to your boat:

Applying the Kit

With a kit in hand and the proper tools at your disposal, you’re ready to tackle the following steps:

Know Your Tools

To start out, you’re going to need some specific tools to handle the job, including:

Diagnosis & Repair

If your boat is so damaged that it needs major repair and replacement just to stay afloat, you need to talk to a professional. But we can address cosmetic holes that won’t have your boat sinking anytime soon. Start with a proper diagnosis of the situation. With your boat on dry land, take a look at the hole from both perspectives (if you can).

Adding Your Patch

Using a patch kit or proper marine sealant, it’s time to add in the patching. Some experts suggest using a backing piece made out of light cardboard to ensure smooth adhesion and a proper fit. Make sure that you include that step before you apply any of the sealant or patching.

What is gelcoat for boat repair?

There are two options available to you: Gel Paste or Gelcoat. Gelcoat is the same material that the boat builder used in the construction of your boat. It is a paint-like liquid that requires an MEKP hardener that is supplied with the gelcoat.

What is thru bolting?

As a result, thru-bolting is the preferred technique (a bolt is placed through the fiberglass and into a wooden or metal backing plate and secured with a nut and washer). Consider using nylon locking nuts with washers for optimal fastening on backing plates.

Can you drill a hole in fiberglass for GPS?

Chances are good that you are going to have to drill a hole or two in this time-tested material when installing a new GPS or make a minor repair after a day when docking the boat didn't go as planned. It is doable, despite the initial fears of every fiberglass first-timer.

Is fiberglass repair easy?

The good news is working with fiberglass has become easier through the years. The bad news is, despite the simplicity, it's still going to cost you a Saturday afternoon. "Fiberglass repair is a broad subject area," says Eiden, "and the beginner needs to understand a few of the basics.

Is fiberglass a good boat?

A few steps that should be followed. Fiberglass is light and it is durable — two important components for boat building. While many of the new models you will read about are made up of composites and use new design technologies, it is still basically a fiberglass boat that comes off the assembly line. Chances are good that you are going to have ...

Can gelcoat be repaired?

For gelcoat repairs, always use polyester products that will be compatible with the area to be repaired.

Why do fiberglass boats need to be repaired?

The reasons they may need to be repaired are numerous: refitting, resizing, removing obsolete equipment, or mistakes. When repairing fiberglass boats, the challenge is to determine an appropriate repair strategy. You want a repair that is safe and adequate, but also realistic.

How long does it take to repair fiberglass?

The first job could take ten minutes and the latter many hours, if not days.

How to force epoxy into a blind hole?

Trying to force thickened epoxy into a blind hole with a putty knife always leaves an air bubble at the bottom of the hole. Filling from the bottom forces all air out of the hole.

What filler to use for fiberglass laminate?

Use 404 High-Density Filler or 406 Colloidal Silica Filler to thicken the epoxy. Fiberglass laminate is hard and strong and using 404 or 406 Filler creates a hard, strong epoxy filler, which more closely matches the characteristics of the laminate. A word of caution: These fillers make epoxy difficult to sand.

How thick is a fiberglass deck?

The deck is 1/8″ thick fiberglass skin with a plywood core. This is a low-risk repair. The hole is small in diameter, the skin is relatively thick compared to the hole diameter, and the skin is backed by dense core material, plywood. If this repair fails, the worst thing that will happen is the plywood core may rot someday.

What happens when you remove a laminate blind hole?

Additionally, when the hole is chamfered on both sides, a mechanical lock is formed when the hole is filled. In thicker laminates, removing the screw may result in a blind hole, a hole that does not go completely through the laminate. In this case, use a syringe to fill from the bottom of the blind hole.

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