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#1
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wax and fiberglass/polyester resin
I notice on the bottle of polyester resin I got that it says not to mix
the stuff in a waxed paper cup. It's in bold too, so it seems important. Not only was that how I was going to mix it, but I was going to lay the material on some wax paper so it won't get glued to the floor. I have used 2 part epoxy in this fashion and it has worked well (the epoxy cures and was too flexible, so I'm using polyester.). Does wax react poorly with polyester resin? |
#2
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wax and fiberglass/polyester resin
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#3
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wax and fiberglass/polyester resin
There are two types of Polyester resin for fiberglass:
1. Laminating resin .... contains wax that comes to the surface when curing so that the next layer fully bonds ... the wax is an 'air inhibitor'. Laminating resins will always feel sticky to the touch because of the wax. This wax is soluable in liquid polyester. 2. Finishing resin ... contains NO wax and when exposed to air while curing forms a hard surface What you have is probably finishing resin .... and any contact with wax will change it. So, you cant use wax anywhere near a finishing resin or you'll contaminate it and begin to turn it into a laminating resin ...... but you can use SARAN to keep it sticking where you dont want it to. In article .com, wrote: I notice on the bottle of polyester resin I got that it says not to mix the stuff in a waxed paper cup. It's in bold too, so it seems important. Not only was that how I was going to mix it, but I was going to lay the material on some wax paper so it won't get glued to the floor. I have used 2 part epoxy in this fashion and it has worked well (the epoxy cures and was too flexible, so I'm using polyester.). Does wax react poorly with polyester resin? |
#4
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wax and fiberglass/polyester resin
The solvents in polyester resin dissolves wax and the wax prevents bonding
of the next coat. It will eat Styrofoam cups too. Been there, done that, got the mess on the shop floor to prove it. I eat a lot of cream cheese and Jell-O pudding just for the plastic cups. :-) -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com wrote in message oups.com... I notice on the bottle of polyester resin I got that it says not to mix the stuff in a waxed paper cup. It's in bold too, so it seems important. Not only was that how I was going to mix it, but I was going to lay the material on some wax paper so it won't get glued to the floor. I have used 2 part epoxy in this fashion and it has worked well (the epoxy cures and was too flexible, so I'm using polyester.). Does wax react poorly with polyester resin? |
#6
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wax and fiberglass/polyester resin
Rich Hampel wrote:
There are two types of Polyester resin for fiberglass: 1. Laminating resin .... contains wax that comes to the surface when curing so that the next layer fully bonds ... the wax is an 'air inhibitor'. Laminating resins will always feel sticky to the touch because of the wax. This wax is soluable in liquid polyester. 2. Finishing resin ... contains NO wax and when exposed to air while curing forms a hard surface What you have is probably finishing resin .... and any contact with wax will change it. So, you cant use wax anywhere near a finishing resin or you'll contaminate it and begin to turn it into a laminating resin ...... but you can use SARAN to keep it sticking where you dont want it to. Beg Pardon. I belive you have got it the wrong way round. Last time I looked at a can of wax in styrene it was to be added to gelcoat or even laminating resin for the final coat if it was to harden in contact with air without leaving a tacky surface and was NOT for laminating. Anyway the OP should just go out and buy a big pack of cheap PolyPropylene cups. That's 5 or PP in the recycling triangle on the base. Suitable for nearly all paints ,resins, glues and solvents you are likely to meet working on boats. -- Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED) ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk [at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL: 'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed, All varnished hot moulded wooden racing dinghy. |
#7
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wax and fiberglass/polyester resin
So PVDC will peel right off?
I don't know that I would risk it with household Saran wrap. Being very thin it can tear and leave little bits that are the devil to get off. I made that mistake with a Saran peelply that was to thin. I needed a lot of stretch for that particular part. It stretched fine but came off in strips. Nylon would have been much better. I generally don't like films as a curing barrier for polyester. A wax sanding aid additive works better and doesn't disturb the surface. -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
#8
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wax and fiberglass/polyester resin
So I don't know who to listen to. Will wax paper leave me with a
unsuitably sticky surface when cured? Wax paper would be easier for me to work with than saran. |
#9
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wax and fiberglass/polyester resin
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#10
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wax and fiberglass/polyester resin
your a moron it should be common sense. you dont need details
explanations to fiqure this one out. |
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