How do you fix stress cracks on a boat?

Geovanni Hoppe asked a question: How do you fix stress cracks on a boat?
Asked By: Geovanni Hoppe
Date created: Fri, May 21, 2021 10:48 PM

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Those who are looking for an answer to the question «How do you fix stress cracks on a boat?» often ask the following questions:

❓ What are stress cracks on a boat?

Stress Cracking

This is often found on the leading edge of the cabin top where it meets the deck. This can be the result of a high flex area enduring heavy seas or too much load on the boat. Cracks may also form at a bulkhead or other hard spots behind the fiberglass when the boat flexes, creating pressure.

❓ What causes stress cracks on a boat?

The causes for stress cracks are much the same as for blistering. We won’t go into great detail here, but suffice it to say that stress cracks occur because of voids under the surface of the gelcoat, and or a lack of strength in the underlying fiberglass or compounds used in the sub structure of the boat.

❓ How to repair stress cracks in fiberglass boat?

BoatUS Magazine's Mark Corke shows you how to easily repair those pesky spider cracks that show up in your boat's fiberglass gelcoat. While this may seem lik...

Question from categories: boat transom fiberglass boat crack repair fiberglass boat repair kit sailboat stress cracks on boat hull

10 other answers

Stress cracks can be successfully stopped however. The crack must be ground out thoroughly. It needs to be ground deep enough to reach good fiberglass (fiberglass that is not whited out or “shattered” or separated) and it needs to be ground out wide enough to reach the good fiberglass on either side and end.

STEP 1: Prep The Area For Crack Removal Before you can start to fix crazing, clear the area of any obstructions and remove all hardware that covers or obscures any part of the cracks. Then, get busy cleaning. Thoroughly wash and dry the area, and remove all obvious surface contaminants with a rag dipped in a strong solvent like acetone.

BoatUS Magazine's Mark Corke shows you how to easily repair those pesky spider cracks that show up in your boat's fiberglass gelcoat. While this may seem lik...

One quick and easy way to repair gelcoat stress cracks yourself is by using MagicEzy Hairline Fix – A purpose built DIY repair solution for stress cracks in gelcoat and fiberglass. MagicEzy Hairline Fix is a one-part, pre-tinted (available in 10 colors) sealant that allows you to complete the repair in seconds without having to grind out the existing damage.

Then follow each separate crack with the Dremel as if you were wielding a pencil. Use the highest speed possible, since low speeds may cause the bit to catch or swerve damagingly from your intended path. And let the Dremel do the work—several shallow passes will produce a cleaner, more accurate job than going for a single, deep, forced march.

How to repair deep cracks in fiberglass boats with the new WEST SYSTEM Fiberglass Boat Repair Kit.

The primary reason why stress cracks appear in gel coat is because gel coat is brittle and the laminate to which it is bonded is less so. Gel coat is basically a resin to which a large amount of coloring pigment has been added, pigments that are oxides of metals like aluminum.

The quickest and easiest way to remove the appearance of spider cracking is to apply a quality paint job to the boat (or at least the damaged area). This method is best used above the waterline. Start by deciding which areas of the boat need attention. It may be possible to paint only a portion of the boat.

Here's one way to fix and repair fiberglass stress cracks.. We use Dynaglass body filler on this repair to make it easy and simpler do Do It Yourself. Fiberg...

This video is a step by step on how to properly repair your cracked gelcoat. Justin at The Skiff Shop shows us his process of grinding out the old gel coat, ...

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