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What does the durepox coating do? Is it just for protection due to its hardness or does it also help with wettability?

Could you explain how to remove stickers from windsurf sails, pleaaaase

Hey Gary, love watching and learning from your videos. I am a Nacra17 sailor from Canada. We are starting to get to the point where we are putting a lot of time and effort into caring for our foils. I had a couple questions, and was wondering if there was a good way I could contact you, if you would be willing to help us out. Thanks!

Excellent

What is the brand name of the strong sailmakers double sided tape you use? In Australia, I can easily obtain Kikusui sailmakers double sided tape, but its very weak, but I can't find the tape you use. In the process of repairing many cracks in an IQFoil board. Masking tape doesn't particulary want to stick to the nonskid finish on the board. Thanks for sharing all this information.

Great video thank you! One question: when doing to final fine sanding what is the best sanding movement? Small circles? Big circles? From leading edge to trailing edge? Or lateral from tip to tip? I saw diagonal too. What's the final movement? I am worried that with the wrong method the water might not 'hug' the wing surface properly.. Thanks!

I got my iqfoil mast cracked near the top. Is there any way to send you a picture to know if it's something to be worried about? Thanks!

Thanks for the nice videos, could you do another video showing how to repair a bigger damage on the tips of the wing if small part is missing?

Great DIY footage! thank you. But i have a question do. Why dont you use a epoxy cement? Drilled holes in a layered composiite is detroying the layers. The shrink wrap is a top tip by the way!

Wingfoil

Thanks for all the information, i have been experiencing some cracking on my foil mast right below where it goes into the fin box.. any advice on how to fix it?

Thanks foillabs for sharing your knowlegde and passion about hydrodynamics and hydrofoils. Beside riding the windfoil i sort of enjoy refining my foils in the garden shed.... 😁 keep up the good work ! greetings from belgium

Is any marine grease ok? My foil came with a 10g tube of Tef-Gel but it's crazy expensive!

Thank you very much, Gary! Can you post links (or the names) of the blades and all the other equipment in your Foil Lab? I'm in the USA, but if you provide the NZ brand I can probably find the US equivalent. Thank you sir! Ed

Sir: Thank you for producing such an informative series of videos on foil repair and tuning. I used to enjoy tuning alpine skis at a shop -- and now that I wing foil (in a rocky environment 😵‍💫) I'm going to invest in proper repair equipment. May I ask, what is the make/model of your touch-up gun? Thanks again! Ed

Hey FoilLabs, just wondering, one of my friends uses acetone to clean his foils for a smoother and faster ride, just wondering if that is a good idea?

Awesome videos! Thanks so much for sharing all your knowledge! I would love to see you finish with the durepox and your finishing process once the foil is true and perfected. I've not found much content on the last finishing process once all the imperfections are worked out. Thanks again for your videos!

Thanks very useful. I’ not sure I’ve understood (I speak french) the type of product you’ve used : is it epoxy glue ? Double composant ?

If fuse is scratched … how to fix?

🌺 𝖕𝖗𝖔𝖒𝖔𝖘𝖒

Thank you for the great videos. Can you post a photo of the failed box before repair? I keep a close eye on my box and often wonder what failure will look like.

Thanks Gary - I was interested in your comment about the direction of force on the box, with the mast pulling down at the back as the foil tries to pivot towards the bow. On my standard windsurfing boards I use a large stainless plate on the deck of my board which I bolt through (it's wider towards the stern) to the tuttle box (essentially huge washers). I have been told this is pointless, but I haven't had any problems so far and think it helps - what's your opinion?

Hi Gary, thanks for the video. While this makes the immediate area of the new box very strong the only thing creating any longitudinal continuity through the length of the board is the glue between the new box and the structures surrounding it. Do the boards have any longitudinal stringers along each side of the original box - or integrated into the original lay and up running fore and aft through the box to take the the loads from the foil, rig and sailor to basically stop the board from cracking off at the front of the box insert or do they solely rely upon the upper and lower laminates of the deck and bottom? Cheers Ian

How much allowance did you give for the glue, particularly where the box mates against the carbon bottom?

Great video, I'm a new wind foiler and you give some great tips. Keep good work!

Hi Gary, am I correct in understanding the last minute of the video where you talk about the sanding stages as you apply the Durepox, then sand at the finer grit, apply Durepox again, then sand at the next finer grit etc etc?

Hey FoilLabs, great video, very informative! Do you have an example of the polyurethane paint you use for the tracer coat? I'm sure I can probably find something similar here in Aus to use.

In the vids you are focussing on removing material from the trailing edge in particular. But at the end, are you rinsing down the whole foil area to make is faster, or only the trailing edge?

Thank you so much for sharing your experience and knowledge. It’s very helpful to improve my maintenance skills.

Thanks Gary, for the new material you advised - Durepox. I'll may be try. Good video. But two things... 1 - there is no high pressure (comparing to ambient water pressure) at lower surface of the profile you showed. May be on very low speeds and high AoA only. At normal speed and low AoA, it is low pressure there, just look at its curvature, it is just less low then on upper surface of the profile. 2. If you wanted to apply resin, why did you rub the surface with hand? Skin oils do not help adhesion.

I would not scrape off the bottom side of the rear edge with the blade. One thing is removing just a build up of a finish (lacquer), and another is shaving off actual carbon body. By removing the body you effectively changed camber of the profile at rear edge. Which would be ok if you consciously wanted to modify the profile to reduce, lets say, inductive drag. And you understood that the price will be - reduced lift together with it. It is like you decreased angle of flaps on airplane. So, removing imperfections is one thing and modifying the existing profile is another. I do not think the second was your target. Then why you've done it?

Thanks from russian foilers comrade

Thanks for the channel! I am just getting acquainted with the world of foil, but I have already faced a small repair, thanks to enthusiasts!

hi, could you make a video of kite foil?

Thanks Gary for the great advice. I am following it to do some maintenance on my moses freeride foil and so far I am pretty pleased with how it is coming up. Question for you: What other product would you recommend for spraying other then the durepox? it seems pretty hard to get around here and impossible in small quantities. anything else a beginner could use?

For the thickener, why high density 404 and not something much softer like 407? I would think you'd want to make sanding those pitting fills easy to avoid messing up nearby enamel.

What a fantastic video!!! In your opinion would fresh versus salt water benefits of a lower grit or higher when compared with salt water ? Thank you very much.

Given the West epoxy system isn’t uv stable, it will need a top coating for longevity.

Thanks for the great video, which is helpful for me. There are a number of different epoxy’s available on the market. Which product would you recommend?

Really neat work. Is that only one layer of carbon?

Thanks for sharing. Can you show how you do the next steps?

Thanks for that Gary, I'm a kite and wing foiler here in Queensland. I find your channel very interesting, it's good to know there is a place I can go if I need to learn about repairs and tuning.

Hi I have a question about the trailing edge of carbon hydrofoil masts. I've noticed on my 2016 lift and now on my 2021 Slingshot Phantasm that over time small Knicks and chips develop. I protect my gear with a padded mast cover all the time and I haven't damaged them at all. Is this a thing you are aware of? Do you have a clip on how to sand/fill/ repair. Cheers Grant

What do you spray the foil with ?

Finally found someone that pays attention to details! I have a MOSES HAVOK that kept ventilating / cavitating above 47 km/h, so I kept dressing the trailing edges on both the mast and the wings... finally got them below 0.5mm and achieved a marginal improvement (will never by MOSES again). As the edge was so thin and SHARP, I did have the misfortune to sustain a nasty cut on my leg during a crash @ 50 km/h. For the past 3 months I didn't maintain my foil at all, just freeride, but I really admire Your dedication. Keep up the good work!

Hi Gary. You do an excellent job of technical guidance, congratulations!

Really great content! I have some questions and was wondering how I could get in touch....

Thanks Gary, for sharing with us how to improve the foils. One question, you take a lot of time on the trailing edges, I understand that is to reduce the turbulence and imperfections. But what I heard and in one of the videos you said too, is the first third of the blade is super important for the lift, even being this important I haven`t seen you working on the leading edge.

Thx Gary. Great video!

You now have sharp blade after tooling. What about safety? Anyway thank you for sharing the technique.