Super Jet Lay glass then wet out?

[BrightE's]

I'm doing my hull reinforcements right now and have cut my templates to shape and am prepping for the glass layup. It's my first time doing this and I am wondering if I can lay down the glass first, then wet over it with epoxy, or, as I've seen many do before, do I need to put down a pre-cloth thin layer of resin onto the bare hull first? For positioning sake, it would be easier for me to lay the cloth first, then wet over it. Not sure if that will have adverse effects though.

 

[Ben Holloway]

resin 1st then cloth then more resin. especially if its a heavy biax your working with...

 

[BrightE's]

Templates cut

 

[Vumad]

Some more experienced may say otherwise, but I believe you need to put down resin, then glass, then resin, then glass, so forth. You can push the resin through but it is harder than just putting down the resin.

It depends on the thickness. It is not hard to push resin through 8 or 10oz weave at all. However, pushing resin through 22oz biax or through multiple layers of anything is damn near impossible.

I'm no expert. I;ve just found so far that cutting that corner often leads to dry areas.

 

[chad]

When I have done hull reinforcements in the past. I lay out sheets of aluminum foil on a flat surface and wet out the cloth first .then right before I lay the cloth in place I put a thin layer of epoxy on the hull . Lay the cloth in place and work out the bubbles with a chip brush Hope this answers your questions. And good luck

 

[BrightE's]

Thanks guys. Looks like I'll just have to do my best to align the glass cloth on a pre-wetted surface.

 

[aytee]

i either do resin then glass then resin as vumad said.. or do what chad said and wet the glass before placing it... problem with dry glass, it doesn't want to contour very well and is more likely to have bond issues... don't worry about perfect placement, once the glass is good and wet you can most likely slide it around a bit to get it fit, it's easier to work with when it's all wet out rather than dry or partially dry... i normally wet it down and wait a couple minutes for it to soak in, then resin again and fit at that point(if i don't wet out first)

 

[Vumad]

Thanks guys. Looks like I'll just have to do my best to align the glass cloth on a pre-wetted surface.

Cold temps prolong drying time. Wait for a colder day or turn the AC down in your working space. Down sides are that the cold days may have higher humidity which is bad for the resin, or using the AC reduces ventilation which is bad for you.

I have found that at 60* I get very long drying times, but once the work is in 80* temps, it dries very fast and very hard. Working with pre-peg and an oven would be nice, but the ghetto version of that is to work in cooler temp with normal resins.

Just be aware of the issues with humidity, and be careful about the ventilation.

 

[BrightE's]

Ventilation from the resin hardener fumes?

 

[AAlamo]

Definitely put down a layer of resin first if you're using biax I just reinforced my ski with 17oz and I don't think it would have wet out completely if I didn't put a thin layer of epoxy down. Also mentioned above, once its wet, its pretty easy to slide around to get it in the exact place you want

 

[BrightE's]

Awesome, thanks.

 

[Vumad]

Ventilation from the resin hardener fumes?

Yes, wear a respirator and try to be in a well ventilated area. Even if you are outside, wear a respirator. If you decide to skimp on the safety, at least wear a regular mask, a scarf, something.

 

[BrightE's]

Respirator, check. Is there any difference in laying the matte or gloss side of the glass against the hull walls?

 

[Radcon15]

She's looking good so far! Are you reinforcing the entire hull or just the walls of the engine bay? Don't know how much is really needed, I'm planning on reinforcing mine on my time off next month.
(Btw thanks for building an awesome 750) I took it out today and finally have my jet works valve set to the right pressure, and I drilled out and tapped the screw in the pipe to adjust the water injection to tune for more low (or top end) power

 

[Vumad]

Respirator, check. Is there any difference in laying the matte or gloss side of the glass against the hull walls?

Pretty side out.

 

[fastgtfairlane]

biaxial is a pain to work with.. ive wet out the area with epoxy then lay the glass down and wet it out again.. takes forever.. presoaking the biaxial will definitely be better.. also i would recommend some cabosil in the line where the halves meet.. mix some up and spread it out and while its still wet you can glass right over it without having to sand it.. doing so will help insure theres no air bubbles in that joint... thats how i did my reinforcments on my ski..

 

[txsuperjetfreak96]

I've had good success flipping the biax over on a piece of wood wetting the back side real good, flip it over and u can tell if u got a good wet out, put it where I'm gonna glass and end up putting more on for good measure

 

[BrightE's]

Total bummer, I went brain dead went I copied my hull floor template onto the glass, ugly side up!!

For all the hard work I put into the build, I want the shimmery glass side up, and that marker is not coming out of the glass. $10 bucks down the hole, and another week wait before I lay glass. :-(

Good news is, I did the hull side templates right.

 

[BrightE's]

She's looking good so far! Are you reinforcing the entire hull or just the walls of the engine bay? Don't know how much is really needed, I'm planning on reinforcing mine on my time off next month.
(Btw thanks for building an awesome 750) I took it out today and finally have my jet works valve set to the right pressure, and I drilled out and tapped the screw in the pipe to adjust the water injection to tune for more low (or top end) power

Conrad, my man, what's up. You must be crazy to have hit the water today. It was windy as all hell and cold at our lake. How was it out there? Lose a few toes to frost bite?? Awesome on getting the 750 into tip top shape. If you want to get some glass laying practice, I'm going to install all my glass next weekend.

Yeah man, I'm reinforcing both sides and the hull floor. Doing the floor more just so it looks good, the sides are what need it if I'm going to be practicing rolls this summer, and maybe lake Michigan. Going with opaque white on all surfaces.

 

[fastgtfairlane]

Total bummer, I went brain dead went I copied my hull floor template onto the glass, ugly side up!!

For all the hard work I put into the build, I want the shimmery glass side up, and that marker is not coming out of the glass. $10 bucks down the hole, and another week wait before I lay glass. :-(

Good news is, I did the hull side templates right.

i wouldnt get more to do that, just flip it over and retrace it.. then put a layer of cloth over it to smooth it out..