HOW-TO CUT and SHAPE FIBERGLASS FOR YOUR NEXT DIY FIBERGLASS PROJECT-FIBERGLASS SELECTION GUIDE

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If you have never used fiberglass before, THIS is the video for you! Fiberglass cloth selection can be confusing, there are so MANY choices! Don't let that stress you out! MOST fiberglass work is done with 5 basic fabrics. Learn their uses, and how to cut and shape raw fiber glass the easy way in this video. This is a follow up video to several other HOW TO fiberglass videos here on the channel, so feel free to check them out. We try really hard NOT to fill our videos with lots of fluff or filler content, so be sure to watch all the way to the end, or you might miss out on some useful information. Fiber glass work is not rocket science, BUT you do need to follow ALL the steps or your work may not turn out right. If you have a question about fiberglass use and application, feel free to comment below. I will do my best to answer your questions. If you find this video helpful, please remember to subscribe, like, comment and share with a friend. Thanks so much for watching!
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12 янв 2024

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Комментарии : 142

@FishBumpTV Месяц назад

We have made Patreon ( www.patreon.com/FishBumpTv ) available for members who are interested in consultations on their projects. Thank you for your support!

@bluethumbdiy4735 3 месяца назад

Mind blown. Can't thank you enough for sharing this valuable knowledge. I'm restoring a 45' south african power cat. Needs some fiberglass work, and out where I'm at, there's no one do do it unless you want to pull it out of the water and let it sit out of service for months. Now I feel confident taking on some of the small work that needs to be done.

@FishBumpTV 3 месяца назад

Glad the videos are helpful! Best of luck with your project

@jakers725 Месяц назад

Excellent video! Thanks for sharing your knowledge on fiberglassing for boats, exactly what I was looking for.

@FishBumpTV Месяц назад

Glad it was helpful! Thanks for watching and commenting!

@stevewoody63 5 месяцев назад

Very informative as usual, Im learning loads thanks

@FishBumpTV 5 месяцев назад

Glad to hear it!

@josemanuelfernandezsanjorg7042 5 месяцев назад

Awesome info ! Thanks!

@FishBumpTV 5 месяцев назад

Glad it was helpful!

@scoutt73 3 месяца назад

Great info on the different types and the best application to be used in.

@FishBumpTV 3 месяца назад

Glad it was helpful! Thanks for the comment

@arnoldsnodgrass2953 5 месяцев назад

Particularly useful to know about CSM and epoxy, thanks

@FishBumpTV 5 месяцев назад

Glad to help!

@derrickcarpenter3804 5 месяцев назад

Really excellent overview on materials and just as importantly, when you would use each one.

@FishBumpTV 5 месяцев назад

Thanks so much, I appreciate the comment!

@iaino45 Месяц назад

I'm starting into the restoration of a Formula 233, I've got so many great tips from this video. Keep up the good work.

@FishBumpTV Месяц назад

Glad to help! Thanks for watching!

@9111logic 5 месяцев назад

Thanks for this valuable info 🙏

@FishBumpTV 5 месяцев назад

Glad it was helpful!

@denistorres8337 23 дня назад

Great information, Thanks for sharing

@FishBumpTV 23 дня назад

Glad it was helpful! Thanks for your comment!

@65peterbilt 26 дней назад

great videos very clear and exp;anatory great job!

@FishBumpTV 26 дней назад

Much appreciated! Thanks for watching!

@timothypalmer454 3 месяца назад

Thanks again for another tip on pulling the mat against a straight edge to feather the edge. I always cut and pulled to feather the edge. Not any more .Thanks

@FishBumpTV 3 месяца назад

Glad to help!

@charliecuts2527 5 месяцев назад

Thanks for all your videos. I've been binge watching. I'm currently doing a restoration on a 24 foot Morgan. It had a yanmar diesel in it and I'm converting to an outboard. It's a lot of work. Your videos definitely inspire me. Thanks again. One Tip that I have learned. Use your little acetone bottle. Draw a line with acetone and it rips really easy on mat

@FishBumpTV 5 месяцев назад

You are very welcome, sounds like a very cool project! Yes, the acetone melts the binders in the mat. that is a neat trick. thanks for sharing!

@michaelmello9510 4 месяца назад

Great job thanks

@FishBumpTV 4 месяца назад

Thank you too! I appreciate you watching!

@markusbroyles1884 13 дней назад

I've been glassing all my life and I learned something here ~

@FishBumpTV 11 дней назад

Glad to help, and thanks for watching!

@bluedogozwoofer6737 5 месяцев назад

thank you for the emphasis on the CSM non compatibility with Epoxy, great introduction video IMHO

@FishBumpTV 5 месяцев назад

You are welcome! Appreciate you watching!

@Herblay63 12 дней назад

@@FishBumpTV I've been using CSM with Epoxy for years. Not the typical CSM which is emulsion bonded but CSM which is powder bonded specifically formulated for use with Epoxy resins and saturates very well.

@robertdean1344 25 дней назад

Yes thank you

@FishBumpTV 24 дня назад

Glad you enjoyed it!

@user-ri5pj3iq9l 2 месяца назад

Great video.

@FishBumpTV 2 месяца назад

Thank you!

@greensdreams 5 месяцев назад

Grear diy intell thx

@FishBumpTV 5 месяцев назад

Thanks! Glad to help!

@stevenlengyel9701 5 месяцев назад

I have so much to learn

@FishBumpTV 5 месяцев назад

Glad you are finding the videos interesting, thanks for watching!

@xx_faz1329 Месяц назад

Great video. Which would you recommend for building a swim platform? And do I need wood or can it just be multiple layers of fiberglass?

@stevehubner560 5 месяцев назад

I love you videos i keep learning just in case one day i need to know lol

@FishBumpTV 5 месяцев назад

Thats awesome! Thanks!

@JohnColeman-ul5rj Месяц назад

This is great information. I want to build up the inside of my center console cause its too thin to mount any new electronics to and I want to redo all the wiring and want to design build my wiring since I am an electrician by trade. Was thinking plywood but I'm more leaning towards glassing in some coosa board instead.

@FishBumpTV Месяц назад

Glad it was helpful! Coosa works great for what you are wanting to do, but plywood could also work. Thanks for watching!

@kerryweldon1597 5 месяцев назад

Great information. I'm getting ready to do some small boat repairs. What about information on the weights of the different CSM? 1 Oz or 1.5 Oz and when to use either. Thank you so much for the great information you provide.

@FishBumpTV 5 месяцев назад

Thanks! 1oz is just easier to wet out because it is thinner material than 1.5 oz. They make 3/4 Oz, but I find it to be somewhat delicate to handle. Just remember that csm doesn't work well with epoxy resins. Polyester and vinyl Ester are fine with csm. Hope this helps, thanks for watching!

@TheKajunkat Месяц назад

In this area, they call the CSM matt "angel hair" and the roven woven "matt". Only other thing they use is "chopped glass" which everyone seems to hate. Funny how you get colloquial terms in different areas.

@FishBumpTV Месяц назад

That's interesting! Thanks for sharing and thanks for watching!

@kevinlarrick3285 4 месяца назад

Thanks for the great videos. Keep them up I’m not working on a boat I’m working on car parts. Wondering how you do sharp edges like on a fender or a hood when it comes to the edge how do you get them to the bond together or never done it like to know, thanks again

@FishBumpTV 4 месяца назад

Glad you are enjoying the videos! I have done some body work on cars and trucks in the past, but boats are obviously our main area of expertise. If I understand you correctly, I would feather or transition the glass as you get to the edges or seams of the fender or hood. If it is a body line, or crease you may have to use a premium body filler or putty to get the shape you need. I will try to do a video on body work and fairing out glass soon. Hope this helps, thanks for watching!

@catherineromeo4891 5 месяцев назад

Thanks again Capt Joe I’m interested in the electric cutter didn’t see it in notes , brand & model I’ve got a small battery 1 it works well but to small, I enjoy working on boats as a hobby not job helping a friend restr. 73 seacraft & after that a73-19’ mako total restoration (my dad’s) thanks again for sharing 👍👍

@FishBumpTV 5 месяцев назад

It is a Romech brand, I bought it on amazon. Sounds like some great project boats. Always been a fan of the seacrafts! I appreciate you watching!

@nonstopfishing6486 3 месяца назад

Capt joe, I see in your videos you lay up your coosa with alot of vinyl Esther resin and you run 1708 by axial and finish it off with CSM is that because your CSM does not have styrene bonding in it ?

@theyard6958 2 месяца назад

Electric scissors are the best addition to the industry in 30 years. another related suggestion is if ya'll's scissors get dull you can sharpen them very easily.

@user-fk6cx6xw1u 5 месяцев назад

Capt Joe appreciate y'all sharing these products was also hoping for a video with a more in depth mixing MEKP simplifying the process so everyone can achieve great finish results this process not to waste material and time Thanks fish bump family!

@FishBumpTV 5 месяцев назад

Glad you are enjoying the videos! That's a great suggestion, I will try to do something along that line soon. Appreciate you watching and commenting!

@doug2202 5 месяцев назад

Another informative video Capt.

@countryman02 5 месяцев назад

Great videos! Love the content. Thanks for sharing your knowledge with the world. Question. Can you use polyester resin with 1708? I am trying to purchase one resin that will work with CSM and 1708. Thanks!

@FishBumpTV 5 месяцев назад

Yes, polyester, vinyl Ester and epoxy will work with 1708. Csm does not work well will epoxy. Thanks, glad you are enjoying the videos!

@countryman02 5 месяцев назад

Thanks for the quick reply!

@FishBumpTV 5 месяцев назад

@@countryman02 Your welcome

@anthonyclark5471 2 месяца назад

I've never done any fiberglass work or anything remotely close and I'm undertaking a resto job on my 27' 93 chaparral cabin, so I'm studying these videos 😅

@FishBumpTV 2 месяца назад

I hope the videos help with your chaparral resto! Best of luck with your project!

@TOMA-ny7gg 2 месяца назад

great video i have quesyion please i have crack on the floor of the bath i bought Bondo fiberglass resin repair kit does it ok?

@FishBumpTV 2 месяца назад

Thanks! I don't use much of the bondo brand resins, and resins can vary a good bit in what they can do. It is possible it could work well, but it is hard to say for sure. Wish I could help more.

@richardlinebackii8558 2 дня назад

This boat I put up in 1992 after using it for roughly 6 years. Idk anything about fiberglass so you really help explain that to do in what situation. It won't let me update it, but it's a 6.5" speed boat about the size of a jetski.

@FishBumpTV День назад

Thanks for watching and commenting, it's much appreciated!

@magicbengalsuk Месяц назад

Thanks for the great videos! I’m about to start repairing a hole on my 1976 Fairline Phantom 32. May I ask if standard mat and woven roving will be sufficient for the job? Or should I use some biaxial fabric like you did on your repair video? The damage on my boat looks similar and might be a through hole. If the standard mat and woven roving is sufficient, what thickness should I buy regarding woven roving?

@FishBumpTV Месяц назад

Glad you are enjoying the videos! Yes, you can use mat and woven roven instead of 1708 if you prefer. Just remember to always start and finish with mat. It bonds better on the first layer than roven, and has better cosmetics on the last coat. I like 18 Oz roven personally. I hope this helps and thanks for watching!

@magicbengalsuk Месяц назад

@@FishBumpTV Many Thanks! 😊👍⭐

@jamincorrodi8084 3 месяца назад

Nice and concise Capitan! A follow up video would be appreciated: How do you come up with a layup schedule? How thick is a layer of cloth? Do you always do mat first and last, or is it not needed first with the xx08 fabrics? i.e. 1.5 oz mat - 1708 - 1808 - 1708 -1.5oz mat? Mat matters more for visual finished surface, or is it needed to hold extra resin for a good bond (or both)? How do you estimate how much material to buy? is there an waste percentage that is common, 10%? How much resin/yard would you estimate? How many layers can do in a single layup? How do you decide to have a core vs solid glass?

@FishBumpTV 3 месяца назад

Thanks, all great suggestions! I will try to add some or all of those to a video. I appreciate you watching

@kazuyoshimishimura 25 дней назад

Depends on what you are doing but always put first and last mat it gives better finish and let you easier remove bubbles from product than when you leave rowing mat Layer of mat 450 gram is about 0.8mm with resin and its about 1 kg its very dependent on temperature with higher temperature you use less resin its just more liquid water like when in low temps it gets more jelly and you ideally should put about 70% of fiberglass but its kinda unrealistic in hand made laminate its way easier to work with it if you put more resin :S Material is estimated by square meters at least here in eu and yea 10% is about right but ISO reduces it to like 6% or something around You see if you put mat and rowing on gelcoat you get nasty looking imprint of rowing so to avid that you should put like 3 or 4 layers of mat and then put rowing How many layers you can put at once? well it also depends on what initiator you use with peroxide its about 5 "450 mat+650 rowing in m+r+m+r+m" but it also varies with temperature with about 27c you get first curing in about an hour with 1% of initiator "1% its 10ml of initiator for 1kg of resin" when in 20c you put like 2% with curox initiator you can put up to 9 layers also depends on temperature be aware tho product may bend or warp in a undesired way its better to put less layers at the time most of the time you decide by cost for example you need to laminate some part non visible in the end so you put two mat layers and call it a day if you use mat rowing mat you use more materials than needed to achieve the same result for example you make a form and you want to reinforce walls so the keep shape so instead of putting few more layers you put instead few pieces of wood planks and laminate them with two mats and get sturdy wall for cheep we use steel beams "heavy" or wood planks "mid" poliuretan foam "light" for reinforcements for good bond its better to know time of curing for gelcoat its better to put mat layers when gelcoat is harden and slighty sticky or when is squeeky when move your fingers on surface for mat its better when its harden and dry try to scratch it using metal blade or nail if leave scratch its good to go if leaves hairs then wait and before putting another layers just sand it a little for better bonding about gramature of fiber glass mat for more complicated shapes put smaller gramature like 150 for first layer when less complicated or flat surfaces you can put like 450 or 800 gram mat for rowing for flat its good 90 degre single woven but for complicated shapes its better double woven rowing

@zanelorimer4030 15 дней назад

Thankyou very much, I've tried tearing smaller widths lately and messed it. Larger pieces (over 150mm /6") seems easier.

@FishBumpTV 15 дней назад

Glad it helped! Tearing small widths is more difficult than wide, but it can be done with some practice. If you want a torn edge on one side and straight on the other, you can tear a wide strip and then split it down the middle with a straight edge and a razor blade. Thanks for watching!

@zanelorimer4030 15 дней назад

@@FishBumpTV I generally cut with knife and feather the edge with side of blade - stripping off hard edge . Learnt that building house boats in Victoria Australia 🦘

@DelSolUnlimited Месяц назад

Hello Joe, I’m restoring a 1973 VIP Bay Stealth. Do I need to remove all the gelcoat in the hull, before laying in new glass? Or can I do a rough sanding and lay in the glass?

@FishBumpTV Месяц назад

I usually recommend removing all of the gelcoat and get down to solid fiberglass. I usually use a 24 grit sanding disc to put a very aggressive tooth or surface on the original fiberglass so that the new fiberglass can bond better. I hope this helps and thanks for watching!

@CarlosGutierrez-ou2bb 4 месяца назад

understand CSM not working with epoxy, Question, can you use epoxy as a second layer after glassing with laminating resin? will epoxy adhere over the resin once you apply the second layer of, say of 1708. Great videos.

@FishBumpTV 4 месяца назад

In most cases yes, you can put epoxy over polyester without problems. Hope this helps, thanks for watching!

@CarlosGutierrez-ou2bb 4 месяца назад

thank you for the info, greatly appreciated.@@FishBumpTV

@kevinshowell8603 4 месяца назад

Very informative, thank you!

@FishBumpTV 4 месяца назад

Glad it was helpful! Thanks for watching!

@davidnewsom6262 2 месяца назад

I am doing a complete overhaul on a 1996 angler center console. I have replaced everything with coosa board. I am now doing the floor and I have 2 pieces that are 1/2" thick woth off set joints nonetheless floor. I have 1 layer of 1808 down now and it feels solid. Should I put another layer of 1808 down then glass the console in or just glass the console in ?

@FishBumpTV 2 месяца назад

Every boat project is different, but we usually go on the heavy duty side when doing glass work. When in doubt we usually add another layer. I hope this helps and best of luck with your project!

@P0420hack 3 месяца назад

I have a 89 celebrity that has cracks in the strakes and was wondering what you suggest using to repair the cracks. They are leaking water into my boat. Thank you

@FishBumpTV 3 месяца назад

That could be a serious structural problem and might require some serious fiberglass repair work. Most damage on boats could be considered cosmetic, but if it is leaking water into the hull, that would be structural damage. We have not done any videos on that kind of repair work, and it might be something you should talk to a repair shop about. At least see what they would have to say. Hope this helps and thanks for watching

@redwood1957 2 месяца назад

Thanks again. How is it that the chop stran mat form Europe is made so epoxy will work. Will we ever get that . Puzzling? Thank again

@FishBumpTV 2 месяца назад

It has a different binder in it that is designed to work well with epoxy. It seems crazy that it is not available here in the States, or at least I haven't found a source for it. Thanks for watching!

@pubuduweerakoon7174 7 дней назад

Yes, there are two kind of csm. It is the powder bound csm which is best compatible with epoxy. Cheers

@maxnavu 4 месяца назад

Great content. Which glass is lightest? Curious

@FishBumpTV 4 месяца назад

Thanks! The 6 oz finishing clothe is the thinnest and lightest.

@maxnavu 4 месяца назад

Thank you

@velosapien 2 месяца назад

Hey man...I love your videos. What gets confusing for us non- Americans is your number system.. 1708...is the 0 a zero or an "owe"

@FishBumpTV 2 месяца назад

Thanks! Sorry for the confusion. It would be 1708, not owe 8. We appreciate all of our viewers, and I am working on adding more metric measurements and easier to understand pronunciations for everyone. It is a work in progress for sure!

@PKAdventures 5 месяцев назад

question, is there a version of mat that does work with epoxy? because i really like the way you use the mat to feather out and hide the edges of the roving and the 1708 on the other vids where you showed how to fiberglass plywood, but i was wanting to use epoxy for a project i'm planning

@WereAllThatBored 5 месяцев назад

Yes, stitched chopped strand mat is compatible with epoxy because it uses no binders.

@PKAdventures 5 месяцев назад

@@WereAllThatBored awesome, thanks for the info

@FishBumpTV 5 месяцев назад

There are also csm

@pubuduweerakoon7174 7 дней назад

Use powder bound csm with epoxy. Emulsion bound csm is suitable with polyester

@nuwansuresh9748 20 дней назад

i like

@FishBumpTV 19 дней назад

Thank you!

@ttwil9810 4 месяца назад

Surface veil works also or 1/2 once matt

@FishBumpTV 4 месяца назад

Thanks!

@shananagen09 5 месяцев назад

Where do you get the fiberglass roll tower?

@FishBumpTV 5 месяцев назад

We built it in our shop years ago. It really makes it easier to work with glass. Thanks for watching!

@robertdean1344 Месяц назад

How many layers of 1708 would it take for a say 16 to 20 foot skiff style hull. ?? Thanks

@FishBumpTV Месяц назад

Boat hull laminate schedules can vary greatly. Our 29 custom has 10 layers on the bottom and 6 on the sides. Smaller boat that see lighter service could possibly use half of that many layers, and would probably be fine. I hope this helps and thanks for watching!

@fathead9264 3 месяца назад

Make more videos please!

@FishBumpTV 3 месяца назад

You got it!

@Gejoepee 2 месяца назад

Which one will you recommend for automotive applications

@FishBumpTV 2 месяца назад

The csm or chopped strand mat is a good all around glass for automotive work. Hope this helps and thanks for watching!

@Gejoepee 2 месяца назад

Thank you very much

@peterfraker7647 5 месяцев назад

How do you determine a fiberglass layup schedule?

@FishBumpTV 5 месяцев назад

It varies from boat to boat. Large boats require more glass than small ones. Commercial work boats are usually built heavier than pleasure boats. So there are many factors. Also just plain experience working with many boat of different sizes you get to see what works. Our 29 ft custom charter boat we built has 2 layers of 1.5 Oz csm for a skin coat, then 10 layers of biaxial on the hull bottom. That yields around a 1/2 inch thick laminate on all flat panels. Nearly 1 inch where it laps in the keel and chines. Hope this helps, thanks for watching!

@hannesaltenfelder4302 3 месяца назад

Which one would you use for difficult shapes like the rounded corner of a heelcup? Does the extra thin mat wrap around those areas or should I cut several overlapping shapes? And what might be a good pressure if I do a positive and a negative mould and press the fiber together?

@FishBumpTV 2 месяца назад

The mat works very good around difficult shapes when used with polyester or vinyl Ester resins. The light weight finishing cloth works well with epoxy around difficult shapes. I don't every use two part molds, so I don't have a answer for that one. Hope this helps and thanks for watching!

@IngeBall 23 дня назад

Twill or satin weave is very good for curves.

@hannesaltenfelder4302 23 дня назад

@@IngeBall Do you know a european online shop, that sells s2- fiberglass in satin? (Taxes and shipping make me pay double the price in such low quantities). And google seems to hide them.

@IngeBall 23 дня назад

@@hannesaltenfelder4302 No, but have you checked in UK?

@hannesaltenfelder4302 23 дня назад

@@IngeBall composite envision: double price, easy composites: double price. Seabase: "only" 150% price, but without taxes. I wish amazon would offer s2...

@kyyurtman1416 5 месяцев назад

Tearing the Matte is the same principle as finish drywall or using body filler and even spray painting.. We call it feathering out the edges. Tearing the matte creates the feathering effect when transitioning to another surface. It can reduce or even remove the visual layer change.

@FishBumpTV 5 месяцев назад

Yes, it really helps the quality of the finish work. I appreciate the comment!

@toddlehman928 4 месяца назад

That and staggering layers to avoid thick spots

@jojinapigkit4680 4 месяца назад

very informative. now I know as to CSM, just tear the mat. now how will you do it as to woven roving sir? please, thank you.

@FishBumpTV 4 месяца назад

Thanks, you can stagger the layers of roven or biaxial for a smoother transition. Hope this helps!

@stanleykubrick8786 3 месяца назад

You never stated why chop & strand mat isn't used with epoxy and what is used for it. Can you please elaborate? Also what's the diff btwn epoxy and poly? (I hate watching vids that are abreviated and leave holes in knowledge). This is complicated. So mat works with woven roven and then can accept epoxy? There are a lot of nuiances here. Thanks!

@CooyaBeach Месяц назад

Pertinent comment re random weave.

@FishBumpTV Месяц назад

Thanks for watching!

@vvvaxxrv3428 Месяц назад

5:10 interesting

@FishBumpTV 28 дней назад

Thanks!

@BernardBouchard-qq9kq 25 дней назад

Use acetone to clean hands

@TROUROCKS 5 месяцев назад

why not mat with epoxy ?????????

@WereAllThatBored 5 месяцев назад

Mat has binders that break down with the solvents in Polyester. Epoxy does not break the binders down. If you want to use epoxy with mat, buy stitched CSM.

@FishBumpTV 5 месяцев назад

Yes, that is exactly right! Thanks!