Tag Archives: epoxy resin

How To Patch a Hole in a Fiberglass Boat

A major fiberglass repair, such as patching a hole, can be a daunting task. Watching a professional do the job can help you get on the right track and be confident in doing the repair yourself. This step-by-step video tutorial produced by Sea Hawk Paints will show exactly what needs to be done when patching a hole in your fiberglass boat.

Note: Before attempting a repair by yourself, get a professional opinion. Always wears Personal Protective Equipment when sanding or working with chemical compounds! Respirator, safety glasses and gloves are always recommended.

Here is a list of products you will need for the repair:

  1. Hawk Epoxy Resin Kit – It contains the epoxy resin, catalyst and filler for the job.
  2. F5 Light Density Filler
  3. Biaxial Fiberglass matting
  4. 50 grit, 80 grit, and 100 grit sandpaper or grinding pads

Hawk Epoxy Video Tutorial

For more information see these other How To Articles:

Filling a Hole in Fiberglass

How Do I Choose Hawk Epoxy Catalyst and Fillers?

How to Mix Hawk Epoxy Resin Properly

Fairing Hull Imperfections

 

How to Get Strong Hardware Adhesion with Hawk Epoxy

hawk-epoxy-Large-May-20141What is the best way to achieve maximum adhesion when replacing your boat’s hardware? This How To article will give you the basic knowledge you need to get your repair done correctly.

Note: Before attempting a repair by yourself, get a professional opinion. Always wears Personal Protective Equipment when sanding or working with chemical compounds!

Here are some simple steps to follow when bonding hardware to your boat:

  1. Sand both the surface and the hardware to get maximum adhesion.
  2. Wet out the surface with Hawk Epoxy.f2-filler-large-may-2014-150x150
  3. Wait a few minutes for it to soak in.
  4. Wet out the Hardware base with Hawk Epoxy.
  5. Mix another batch of Hawk Epoxy with F2 Structural Adhesive Filler.
  6. Coat the hardware base, screw threads, and surface mount with the epoxy/filler compound.
  7. Tighten hardware bolts until some epoxy mixture squeezes out.
  8. Use your finger to fillet the excess mixture around the hardware base for extra strength.
  9. Before using the hardware, allow the bond to cure overnight.

Hawk Epoxy Video Tutorial

For more information see these other How To Articles:

How Do I Choose Hawk Epoxy Catalyst and Fillers?

How to Mix Hawk Epoxy Resin Properly

Filling a Hole in Fiberglass

Fairing Hull Imperfections

Fairing Hull Imperfections

hawk-epoxy-Large-May-20141What is Fairing?

Fairing is process of smoothing out and restoring the damaged surface of the hull. A fairing compound such as Epoxy resin can be used to fill in divots or gouges and then be sanded to a smooth finish. This restores the surface to its original shape and also prepares it for painting.

Note: Before attempting a repair by yourself, get a professional opinion. Always wears Personal Protective Equipment when sanding or working with chemical compounds!

Here are some guidelines to fairing out imperfections in your hull:

  1. Sand all loose surface debris and hard edges.f5-filler-large-may-2014
  2. Rid surface of debris with clean cloth.
  3. Wet out surface with Hawk Epoxy.
  4. Mix another batch of Hawk Epoxy with F5 Light Density Filler and apply to repair area.
  5. Use long strokes to spread out filler compound over the damaged hull. Apply until the mixture is slightly raised above the hull surface. Make sure the compound extends beyond the repair area.
  6. Let cure 6 hours.
  7. Add skim coat of F5 Filler / Epoxy compound to achieve a very smooth surface. Let cure.
  8. Sand the repair to the desired shape with 80 grit sandpaper.
  9. Finish by applying another 2 or 3 layers of Hawk Epoxy Resin.
  10. The surface is ready to be painted!

Hawk Epoxy Video Tutorial

For more information see these other How To Articles:

How Do I Choose Hawk Epoxy Catalyst and Fillers?

How to Mix Hawk Epoxy Resin Properly

Filling a Hole in Fiberglass

How to Get Strong Hardware Adhesion with Hawk Epoxy

 

 

 

 

Which Resin Should I Choose?

Choosing the right resin depends on the type of project you are tackling. Listed below are the most common types of resins are their intended uses:

General Purpose Repair Epoxy Resin Kit

Hawk Epoxy KitEvery household should own a Hawk Epoxy Kit like this. You can use it to repair anything around your home or own your boat. This kit comes with the resin, catalyst and your choice of filler. Just mix them together and you have an excellent bonding, filling, or adhesive paste.

Polyester Resin:

MARINE ResinPolyester resins are unsaturated resins that are combined with hardeners, such as MEKP.

Polyester resin is used more for fiberglass lay-up or if you’re going to finish a repair with gelcoat, as the polyester resin will bond to the gelcoat better than epoxy.

Vinyl Ester Resin:

Vinyl ester resins are formulated with a base of polyester resin strengthened with epoxy molecules (a hybrid form of polyester and epoxy) and also use peroxides, such as MEKP, for hardening. These are cheaper than epoxy resins and more expensive than polyester.

Vinyl esters are more tolerant of stretching, less likely to show stress cracking and more resistant to water penetration. Vinyl ester is the choice when improved resistance to moisture is the goal (like repairing a blistered hull).

Long term water exposure (hull or water tank) or if impact resistance is important vinyl ester is usually chosen.

Epoxy Resin:

Epoxy ResinEpoxy resins are cured with the addition of a hardener. Unlike the polyester and vinyl ester resins, cured with a small amount of catalyst, epoxy resins usually require a lot more, often 1:1 or 2:1. A epoxy resin is the most expensive of these.

Epoxy resin has the best bonding strength as it will bond dissimilar or already cured materials for strong, reliable repair work. This is the most expensive resin but offers the most in its ability to flex, prevent delamination and ease of repair work.

If doing a repair and not overlaying with gelcoat then the epoxy will perform best as it tends to act as a stronger “glue” for the patch to the surrounding surface.

Epoxy Resin (Bar Top Epoxy Resin):

A Premium Commercial Grade Clear Epoxy Resin – Klear Kote Epoxy Resin is used extensively in coating surfaces and in table tops where a clear, hard and durable coating is required. Commonly seen on bar tops and restaurant tables. Easy to use 1:1 mixing ratio of resin and hardener.  Items coated with it will become permanently preserved and protected for your enjoyment throughout a lifetime. The epoxy resin will not exhibit blushing or sweat out under high humidity conditions.