Ye,you are observing ,as well he is Chemist ,studied man,got do it ,the explanation is complete ,see,? Ostoychiometry , not just fiber glass man thank you profe !
Is it okay to skip the surface agent and just paint directly onto the tacky surface? I’m building a teardrop trailer and plan on painting with a bed liner. Could that go directly onto the polyester resin?
hello. When our latex mold was dry and we wanted to make a fiberglass mother mold, what material should we use so that the fiberglass mother mold does not stick to the latex mold?
This might be a silly question, but can you dilute the catalyst? Essentially we need the ratio of resin to catalyst to be like 10:1, could that be possible with polyester resin or it's fundemantly not possible?
I have lots of experience with epoxy building large RC jets but non at all with Polyester. I'm making the switch to poly cause the price of epoxy is just nuts now. Please tell me how you would join two parts that are made of poly. Its my understanding that poly wont stick to poly. Also when should you use Waxed and Not waxed? If I make a mold out of Blue foam, what should I use for tooling coat that wont melt the foam. Thanks so much
Epoxy and MMA (methyl methacrylate i.e. plexus) adhesives are two options. Without getting in the weeds too far, poly will stick to poly but timing, joint type, and surface prep are all important. I get that epoxy is expensive but I'm not sure I would switch on high performance parts like RC jets.
That really depends. Styrene, which is the chemical you smell in polyester resin is heavier than air, some shops have the airflow designed to move the down and away from the laminator and may not wear respirators. We do recommend you wear a respirator, I usually don't in a video like this so that the audio is better.
Hi How long does it take to gel or hardened. ? Often i find some polyester takes overnight to cure ( i did it this alvo at 6 pm and it was probaly 16 degrees celcius) and it hasnt hardened and its 9 pm . Thankyou
Depends on the resin system, temperature, and catalyst amount, but generally it will gel in 20-45 minutes and should be hard within a few hours. It may remain tacky to the touch for some time unless it has wax in it and that is normal to allow bonding subsequent layers without sanding. It does sound like you have some issues, which could be bad resin (it will go bad over time), insufficient catalyst added or not mixed properly, or the catalyst has gone bad (that happens too).
Because they are so close in specific gravity you can go with either, we usually use volume. This applies to polyester resin, for epoxy the ratios between weight and volume are different because the specific gravity between the resin and the hardener are different.
Interesting question. I have seen both weight and volume used on resin manufacturers data sheets, general practice is to mix by volume. The difference between the two is negligible and because with polyester resins you can vary the amount of catalyst you add this small difference should have no adverse effects on the performance of the resin. Just to be clear we are talking about polyester resin systems, not epoxy, epoxy is a completely different chemistry.
Thank the Lord that there's the correct detail and not some halfway explained deal! Thank you so much you are so helpful!
Ye,you are observing ,as well he is Chemist ,studied man,got do it ,the explanation is complete ,see,? Ostoychiometry , not just fiber glass man thank you profe !
God bless you for showing us beginners how to fiberglass with polyester resin. Many thanks
You are very welcome
Oh. Perfect timing on the video. Very cool. Thank you
Your welcome!
Is it okay to skip the surface agent and just paint directly onto the tacky surface? I’m building a teardrop trailer and plan on painting with a bed liner. Could that go directly onto the polyester resin?
Exactly what I needed to know. Thanks!!
Another great informational video. Love learning from you guys.
Thanks!
Thanks for sharing your videos....can I fiberglass around/over hardware cloth?
hello.
When our latex mold was dry and we wanted to make a fiberglass mother mold, what material should we use so that the fiberglass mother mold does not stick to the latex mold?
What would you suggest to adhere to acrylic? More specifically Seadoo jet ski cm-tec hull repair?
Hi! We spilled resin on the patio and all over other unopened bottles of resin in the cardboard box. How can we properly clean this up!?
Thanks for this video. Please what is the mixing ratio between the vinylester resin and catalyst
Typically 1.5 to 2.5%, but depends on the specific vinylester you are using and temperature you are working in.
This might be a silly question, but can you dilute the catalyst? Essentially we need the ratio of resin to catalyst to be like 10:1, could that be possible with polyester resin or it's fundemantly not possible?
Excellent explanation
thanks for sharing this video keep safe always i watch this because its my 1st time to use fiber for my car referring
Glad to help
How many hours to take set resin on silicon mold
I have lots of experience with epoxy building large RC jets but non at all with Polyester. I'm making the switch to poly cause the price of epoxy is just nuts now. Please tell me how you would join two parts that are made of poly. Its my understanding that poly wont stick to poly. Also when should you use Waxed and Not waxed? If I make a mold out of Blue foam, what should I use for tooling coat that wont melt the foam.
Thanks so much
Epoxy is better
Epoxy and MMA (methyl methacrylate i.e. plexus) adhesives are two options. Without getting in the weeds too far, poly will stick to poly but timing, joint type, and surface prep are all important. I get that epoxy is expensive but I'm not sure I would switch on high performance parts like RC jets.
Is it safe to do polyester fiberglassing without a respiator?
That really depends. Styrene, which is the chemical you smell in polyester resin is heavier than air, some shops have the airflow designed to move the down and away from the laminator and may not wear respirators. We do recommend you wear a respirator, I usually don't in a video like this so that the audio is better.
Hi How long does it take to gel or hardened. ? Often i find some polyester takes overnight to cure ( i did it this alvo at 6 pm and it was probaly 16 degrees celcius) and it hasnt hardened and its 9 pm . Thankyou
Depends on the resin system, temperature, and catalyst amount, but generally it will gel in 20-45 minutes and should be hard within a few hours. It may remain tacky to the touch for some time unless it has wax in it and that is normal to allow bonding subsequent layers without sanding. It does sound like you have some issues, which could be bad resin (it will go bad over time), insufficient catalyst added or not mixed properly, or the catalyst has gone bad (that happens too).
So if I wanna mix 4 ounces of resin how much hardener do I add?
For every four ounces of resin, how much hardener do I need? I want it by teaspoon, or 1/4 teaspoon. So simple, but no answers.
1 or 2 % of weight or volume? or is that depending on the resin system?
Because they are so close in specific gravity you can go with either, we usually use volume. This applies to polyester resin, for epoxy the ratios between weight and volume are different because the specific gravity between the resin and the hardener are different.
Thanks for the video. I was taught to add catalyst based on weight, not volume. Is adding catalyst by volume recommended by resin manufacturers?
Interesting question. I have seen both weight and volume used on resin manufacturers data sheets, general practice is to mix by volume. The difference between the two is negligible and because with polyester resins you can vary the amount of catalyst you add this small difference should have no adverse effects on the performance of the resin. Just to be clear we are talking about polyester resin systems, not epoxy, epoxy is a completely different chemistry.
@@FiberglassSupply Thanks for the reply. Yes, I am aware epoxy is different :)
Great job
Thanks
I will study w/ you ! Thank you.😅
You da Man !!!
Thank u
no respirator is wild
Eureka!!! Dr Baltazar discovered hot water.
What is the mixing ratio between the vinylester resin and catalyst please I need the answer thank
@@jonathanpepple 2%