Applying a Fiberglass Epoxy Seal (Ep 10 – Cedar Strip Canoe Build)

Fiberglass and epoxy are great materials for use on boat building projects.  They can be used to make a waterproof seal.

The wooden boat builders have found good use for these materials, and there has been a lot of development especially for that application.

From Youtube A Guy Doing Stuff

In this video I explain how I apply a fiberglass epoxy seal to the outside of my cedar strip canoe.

This is one of the most exciting parts of the building process but it’s also the most stressful and scary. There are so many variables that can affect how the epoxy cures (mixing ratios, temperature, timing, application technique, dust, unknown factors, etc.) – you should make sure you are very comfortable with the process before you start. Do a lot of research and it’s a really good idea to practice on some scrap beforehand – especially to get a feel for applying coats on top of previous coats.

Materials & Supplies:
6 oz, 60” wide fiberglass cloth
Ark Composites Resin and Slow Hardener – This is a 2:1 ratio. I ended up using almost a full gallon of the resin and a half gallon of the hardener. I probably won’t use as much for the inside of the hull because I don’t need that to be perfect.
Premarked cups with the ratios for mixing the epoxy. They also sell pumps that pump the exact amount so you don’t have to measure but I didn’t order those in time as I had to do this on a specific day to get people to help me. The pumps make it easier but the cups worked fine for me.
Stir sticks – just make sure they’re dust and splinter free
4” foam rollers
Friends – If you don’t have any friends this is a great opportunity to make some. It’s nice to have one person mixing epoxy and two people applying it. If you want to make this way harder on yourself you can film it too. It’s a real pain having to film everything you do!

We started at 5am. We applied 4 coats every 3ish hours – I finished applying the last coat around 6pm.
Roll the fiberglass out on the canoe and push the wrinkles out with a paint brush.
You have to continually mix small batches of epoxy as you work. Mix the correct ratio then stir for 2-3 minutes. The pot life is only about 15 minutes and the faster you get it on the easier it is to work with. After about ten minutes in a cup the epoxy will get thick and begin to get hot. It gets extremely hot if you let it cure completely in a cup. There is a lot of videos on youtube about two part epoxy – you should watch as many as possible.
Pour the epoxy on the fiberglass and spread it around.
I start near one end, work towards that end, then return to the starting spot and work towards the other end.
The end of the canoe is the most difficult part. For my first canoe I tried to fold the cloth over the end but it didn’t work very well. For this one I just work close to the end, then cut the fiberglass at the stem. There is no fiberglass on the ends of the stems but I did epoxy the bare wood.
It’s easiest to pour the epoxy on the middle of the boat then work it down. It takes some practice but it’s really not hard.
I pass over areas I did 20 minutes before to take off the excess epoxy to ensure an even coat.

The 1st coat is by far the most difficult and stressful. All subsequent coats are easier because the cloth is already in place. I apply them with a foam roller. I pass over spots after 20 minutes as I did with the 1st coat to ensure an even coat. I could have gotten away with 3 coats but I wanted to make sure all the fiberglass was completely buried in epoxy.

In this video I explain how I sand the fiberglass/epoxy seal on the outside of my canoe and how I apply a seal to the inside hull.

Repairing Damaged Reclaimed Wood – The Dutchman

Utilizing epoxy resin in woodworking projects is a great application of modern materials into a classic furniture.  For instance, epoxy resin is a material that can be used to repair reclaimed wood.

Epoxy resin is a great adhesive, and it can replace wood glue.

From Youtube The Homestead Craftsman

 Here’s another video in my series on making farm tables. I show you how I do a simple repair to the edges of my reclaimed lumber when making table tops. I use an age old tradition called a dutchman, which is basically cutting out the damaged area and replacing it with a piece of wood. I demonstrate doing so in a oak flooring board from a barn, where the board was notched out around a post. I cut out a dovetail shape and replace it with a piece of lumber cut to fit. Enjoy.

How to Restore the Shine to Fiberglass Boat Gelcoat— BoatUS Magazine

Fiberglass boats require regular maintenance to keep them looking good.  The gelcoat surface can become dull and weathered due to age, sun, air, and water.

The good news is that this can be repaired.  The shine can be brought back to new condition.

From Youtube BoatUS

BoatUS contributing editor Lenny Rudow gives a webinar on how to maintain and polish fiberglass gelcoat into a showroom shine. He discusses how to keep boat hulls looking in top condition. After years of boat ownership and testing every boat polish, compound, and wax, he shares his favorite products and describes how best to apply them.

BoatUS Magazine is the flagship publication of the Boat Owners Association of the United States. The award-winning magazine is delivered bimonthly to more than half a million BoatUS members and focuses on up-to-date issues, maintenance projects and skills that every boater should know.


Four Layer Epoxy Pool Coating Application

Swimming Pools are a harsh environment for composites materials.  They have some advantages compared to other materials, but are still affected by the sun, chemicals and temperature.  Composites materials become damaged over time, and repair may be required.

Composites materials can also be used as a coating repair on top of other materials such as concrete.  The epoxy seals cracks and smooths the surface for a cleaner look.

It is very important to use the correct tools and materials and follow the proper order of operations.  Once all of this work is complete, you will have a very nice swimming pool!

From Youtube Pool Solutions:


Truck Camper DIY- How to Build

Pickup Truck owners have been adding slide-in campers for many years.  There have been commercially built units for many years.  It is also possible to build one yourself.  The tools are widely available, the techniques are easy to learn, and the designs are up to you.

This video gives you a look at how I built my lightweight truck camper. The camper was built with everyday tools most people have. It is a one piece fiberglass unit. The camper weighs 630lbs dry and approximately 900lbs loaded. This camper was made to fit my 2004 Dodge Dakota. Every part of the camper was custom made except the windows and rear door which were taken from an older aluminum camper.

From Tool Man Taylor

Repairing a cracked kayak hull

Epoxy and fiberglass can be used to successfully repair hull and deck cracks.
There are some important steps to follow, and the correct materials must be used.

Epoxy resin bonds very well to many materials, including kayaks made of ABS, fiberglass, and epoxy resins.

Youtube user Mark Jones shares his experience:

Hurricane brand kayaks are repaired with epoxy and fiberglass. A final gel goat application makes the repair disappear.


Custom composite parts made from carbon fiber and epoxy can be made at your own workshop should you have the proper equipment, knowledge, and materials.

Doing epoxy resin infusion with carbon fiber reinforcement is pretty advanced, but is possible.

Here is an example that includes the process of building a custom mold:

From Youtube Matthieu Libeert

In this video I show you how to make a laptop case in carbon fiber from start till finish! This is a pretty advanced tutorial that should show you some insights on how I’ve made it. The laptop used in this tutorial is a Lenovo thinkpad X1 Carbon… for more specs on the laptop if needed.

I’ve decided to share the progress on how I’ve build it on here. I know it very hard to make something like this at home without the right equipement but I hope this will inspire you in some way. At least it will show you how carbonfiber parts are made in the F1/bike/race/space industry

It all starts with drawing everything in fusion 360 to do a virtual fit in 3D. After that I’ve used my X-carve from inventables to cut out the exact shape. Have a look at to find more about the X-carve

Once carved I’ve decide to route all the sides of the pre-mould to get a nice rounded edge on de MDF. MDF is a type of ‘wood’ that will suck up a lot of moist/water/resin. That’s why I’ve Decided to coat it with an epoxy resin, tinted with red pigment. polished it all and proceeded with the mouldmaking.

Everything starts with the release-agent. after that I use the entire uni-mould mouldmaking kit from Easycomposites for all the products used in this video.
First layer is the gelcoat, after that the coupling coat with a 100g/m chopped strand fiberglass. On top of that there is the polyester tooling resin with 4 layers of fiberglass chopped 400g/m

Let both halves cure, bolt them together and trim off the excess edges. time to demould and remove the piece, wetsand to a high gloss and get the mould ready to make the parts.

Used a technique called VARTM or resin infusion to create high end carbon fiber parts. Lay-up is 3 layers: 200 twill weave, 650 twill weave, 200 twill weave. peelply on top and infusion mesh to finish. time for bagging and tacky tape with all the connectors in place.
Used the infusion resin IN2 from Easycomposites and infusion was done.

Wetsand and trim the parts, glued them up and your done!!!

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