SPRAYING GELCOAT DIY STYLE FOR BOAT REPAIRS!

Great job. Thanks for the advice

My guess is its dimethyl ether or some other HC like propane

That was generous of you to share your knowledge for free…. I don’t have a boat and I’m not making a repair ha but I’m smarter today than I was yesterday. Cheers

My gelcoat appears to have cracks in it. Can I clear gelcoat over the cracks?

Tried Preval with variety of house paints and it clogged due to freezing of the outlet. Pressure drops and it freezes quick. I tried it in Florida and maybe paired with the humidity it was worse at freezing. 🤷‍♂️ Absolutely worthless. Maybe could work with thin stains. I can’t imagine using it with gelcoat.

Check the MSDS for the propellant contents.

Wow think my boat may have blisters in the gel coat as well I just picked it up not too long ago

My old spray tan set up from a tanning salon works great for spraying cut gelcoat ( and everything else ive tried to run thru it )

I use these pre-valves often and one thing you can do is keep a heat gun handy and keep them warmed up as you go I just pop them off the top and warm them for about 15 to 30 seconds then resume

Hey Andy. Have you done a video on drilling a transom for an outboard with over size holes, filling the holes with epoxy then redrilling to the proper size?

pretty sure your dad was willie nelson, thanks for all your videos ive learned a ton

Video suggestion: a re-visit: "teak" decks. Fake teak/eva/foam.. maybe theres even some good and cheap alternatives? Id like to try spruce wood, oiled with color that makes it look a bit like teak. Good idea or not? Thanks for a great video knowledge source for all my boat projects!!!

I just bought one of these sprayers to try with Awlgrip. Have you tried the Awlgrip yet with this sprayer?

GELCOAT vs boat paint....

Take a look at the 3M Accuspray PPS system. Tips and cup liners are disposable. Preval on steroids!

Andy, thanks for this video. Maybe do one on some of the rattle can that come with the hardener, that you mix in then shake and spray.

Try wrapping a hot wet rag around the Preval sprayer. It will help keep the temp up and make the cartridge last longer. Works for rattle cans too: a bucket of warm water (not hot!) will give them a boost when they’re cold.

Just realized I've missed two months of your videos. Checked and Yup, I was still subscribed. HOWEVER, YT changed the notification bell from "All" to "Personalized."

Damm I used the durateck on the bottom of my 1972 boston whaler will it blister on a trailer boat? I've had a problem micro cracks appearing after filling yes it has the boston whaler alligator pox on gel coat I have used the 3m vinylester filler. the latest try is to soak the surface with west epoxy with slow hardener it been on a test area 3 months so far its ok should i use hibuild epoxy primer im finishing the topsides with paint. will paint on the bottom stave off the blisters I hate to flip it over again thanks jerry k

Keith Rucker over at VintageMachinery used one of those to paint some old Cast Iron Norton Tri-Stone holders....he said he most likely wouldn't use them again. The things constantly froze up, and did exactly what you said...and that was enamel paint that was properly thinned. He said he'd pull a sprayer out to do it next time.

prolly nitrous in then can LOL party on Andy LOL

I've used these to spray PVA on top of fresh gelcoat. Spray 2-3 coats with 5-10 minute drying time between.

Great tips and info!

Finally!!!! Thank you

how good is physics, colder the temp the less pressure you get out the nozzle, plus this vid convinced me that 2 pac is the way to go, just prep a bigger area and blend it

Does the gelcoat without wax harden up? Do you have to do something additional to replicate the action of the wax?

I just brushed gel coat on my transom should I add marine paint to protect it ? Did I miss something 😢 hasn’t been in water just yet either 😬

they work great completely vertical, but are much more difficult to use at weird angles

How about using one of those on that green spot behind you. That unfinished section on that amazingly shiny and dark hull bugs me every week. 😂

But you really need a gellcoat gun with a 2.5 mm. nozzle or a metal flake nozzle on a car spray gun, remember you want a GELL coat, not a thin paint-like finish...

Only the Mono Styrene, if you don't have the wax gellcoat you can add melted paraffin wax to the styrene first. I make my own gellcoat from polly resin add pigment then add the melted wax to the styrene in the correct ratio and go from there. Not easy to get right the first time.If you really want to mix using the chemicals not the fancy costly additives learn by experimentation. This is better because then you will become a chemist and know WTH you are doing.😀

SDS says the propellant is 30-60% propane and 30-60% butane.

Enough with the crap placeholder videos

Your shop temp is 68!? It's 25 degrees outside.

Hey, I have a 26ft I want to spray(first time). I have 5gallons of waxed gelcoat. Should I spray one side of the boat at a time to get as much build up or should I try to go around the boat a few times before it kicks? What advice do you have?

I repair leather seats and I use these when I need texture to hide a repair to reproduce the grain pattern in a door or seat or armrest, they simply spit to much. I would recommend a badger. 250-4 with large nozzle.

Thanks for another great video. No matter how many of your videos I watch i still say the ending with you daughter and always smile. It reminds me of all the time I lost with my kids when they were little. Now im loosing all that same time with my grand kids

How’s the shoulder holding up, Andy?

Thanks for showing this very informative. Another idea to demo would be the $10 Harbour freight paint sprayers. Always wondered if they would work.

I Work at a boat shop in Northern lower Michigan. Been seeing Centurian/ Grady Whites with hull blisters lately. New boats If you could have a video covering this would be great.
Repair blistered as well..😬

Is there an alternative way to touch up an area about 1 sq foot? Roller? I haven’t used an air brush before. Can you show us these alternatives?

Could you apply a layer(or multiple layers over 1 or more spray sessions) of laminating resin w/o wax and then final layer with the resin w/wax so the whole thing will cure hard? Re-coat time interval for all layers could be multiple sessions over multiple days. I am assuming that the requirements would be the same as using laminating resin when laying up glass, do not require sanding between layers(if done in a reasonable amount of time of course), is that correct?

Harbor freight little touchup gun drill the tip ( can't remember the exact size i can check if your interested) spray two coats not thinned then sand to 100, then take your good gun thin to 17seconds on a Zahn #4 cup spray looks like glass...I like styrene too but has a short self life.
oops! thats a ford #4, hey I bought it like thirty years ago.

Hi Andy. Wouldn't it be easier to use the Gelcoat with the additive you used on the dinghy and roll it out for a small repair. Great video thanks 😊

But the Moppie? 😭

Indeed very helpful!

Good stuff andy!

i dont use them but ive always been curious about these things. thank you for doing this.

Andy I'm apply same sprayer -garbage only I just spoiled a portion of the gelcoat ,,, there is a liquid in it that probably just interferes with the normal spraying of the material, it may be necessary to heat the balloon to a certain temperature before use, but it does not work correctly, as shown in the advertisement in general