Topic: fibreglass resin (Read 9141 times)

Mike0001 · « **on:** January 21, 2015, 01:22:12 pm »

hi

looking for a good buy on fibre glass resin anyone point me in direction of a good purchase, I have 3 boats to do

thanks all

inertia · « **Reply #1 on:** January 21, 2015, 01:49:43 pm »

This company comes recommended to me. http://www.ecfibreglasssupplies.co.uk/default.aspx
DM

mikearace · « **Reply #2 on:** January 21, 2015, 01:49:54 pm »

With or without matting?

Subculture · « **Reply #3 on:** January 21, 2015, 02:19:13 pm »

Epoxy or polyester resin?

Rottweiler · « **Reply #4 on:** January 21, 2015, 03:39:28 pm »

Try http://www.cfsnet.co.uk/

The best and cheapest you will get! Ask Neil ,and he uses them all the time!
Mick F

nemesis · « **Reply #5 on:** January 21, 2015, 06:01:55 pm »

Try East Coast Fibreglass supplies of South Shields, excellent service, ask for Gary as he is the Boss. nemesis

Mike0001 · « **Reply #6 on:** January 21, 2015, 06:08:17 pm »

It was polyester and no matting

Netleyned · « **Reply #7 on:** January 21, 2015, 06:12:58 pm »

Polyester ain't waterproof and becomes brittle.
If you are just coating you need an epoxy coating resin.

Ned

Mike0001 · « **Reply #8 on:** January 21, 2015, 06:18:09 pm »

Inside of hulls.... epoxy coating resin then ?

Colin Bishop · « **Reply #9 on:** January 21, 2015, 06:22:16 pm »

Quote

Polyester ain't waterproof and becomes brittle.

I don't agree there! Look round any marina and it is full of yachts dating back to the 1970s laid up with polyester resin which refuse to fall apart, much to the chagrin of today's boatbuilders.

Yes, some have suffered from what is popularly known as osmosis but only when left in the water most of the year round which isn't something we do with our models. Polyester is fine generally if applied properly, but I do agree that epoxy is better as a pure coating and in the quantities we use it for it is a no brainer really.

Colin

Netleyned · « **Reply #10 on:** January 21, 2015, 06:37:24 pm »

Agreed Colin, but they have a gel coat and normally some paint covering.
On models it doesn't'get that industrial protection.
If used as a glue/ coating polyester comes out second best to
epoxy resin.

Ned

Colin Bishop · « **Reply #11 on:** January 21, 2015, 06:50:22 pm »

The gel coat is polyester and it isn't usually painted if at all possible as once you go down that route you have to renew the paint every few years.

But, as I said above, epoxy is better, it just costs a bit more. Not necessarily a problem. Any resin is brittle on its own without some form of fibre reinforcement.

Colin

Subculture · « **Reply #12 on:** January 21, 2015, 09:39:53 pm »

You need to bear in mind that laminating resin has somewhat different properties to gelcoat resin.

If it's for finishing off a wooden hulled boat, i would personally use a very lightweight glass cloth in conjunction with epoxy resin. This will massively increase the strength of your boat with a minimal weight penalty, and ensure it remains watertight forever and a day.

Mike0001 · « **Reply #13 on:** January 21, 2015, 10:20:52 pm »

this ok then

http://www.ecfibreglasssupplies.co.uk/p-2453-mas-low-viscocity-epoxy-kit-slow-cure.aspx

http://www.ecfibreglasssupplies.co.uk/p-687-300g-1oz-chopped-strand-matting.aspx

vnkiwi · « **Reply #14 on:** January 21, 2015, 10:27:37 pm »

http://www.ecfibreglasssupplies.co.uk/p-664-surface-tissue.aspx

myself, I use similar to this on planked model boat hulls, using a similar epoxy resin to your link

The Matt in your link I would use for laying up a hull from a female mould.

cheers
vnkiwi

jarvo · « **Reply #15 on:** January 21, 2015, 10:35:54 pm »

Hi Mike

Have a look at www.easycomposites.co.uk they specialize in epoxy resins and glass cloth, small quantities are no problem, have used this stuff several times and its the stuff a lot of the aeromodelers use for coating wings etc.

There website has how to vidios and a catalogue, lots of info and help is only an email or phone call away. plus you are in corby they are in Longton Stoke on Trent, call in for help and advice with out the postage!!!!!

Mark

Subculture · « **Reply #16 on:** January 22, 2015, 10:00:37 am »

I wouldn't use surface tissue or chopped matt regardless of the resin system used.

Surface tissue is basically a print through blocker, it offers little in the way of strength, it's also not generally compatible with epoxy resins.

Chopped matt will give a thick and very coarsely finished coating requiring tissue and top coating to get a presentable finish. Also only powder bound matt is suitable for use with epoxy resin, and most matt tends to be styrene bound.

Use very fine cloth of about 25-40 grams/m2, this is as fine as tissue, but very much stronger. It's compatible with any resin system. I would go for a twill weave as it drapes nicely.

inertia · « **Reply #17 on:** January 22, 2015, 10:54:28 am »

Quote from: Mike0001 on January 21, 2015, 06:18:09 pm

Inside of hulls....

If this is the only job you need to do then experience has shown me that polyester resin is OK, and you don't need any other material. Just mix it up and slop it round with a stiff brush to reach into all the corners. If you want to add strength to the inside of the hull as well then you're into cloth and resin. Tissue and chopped-strand matting are old-hat, generally only for use with polyester resins and a nightmare to handle. For external finishing I've found nothing to beat lightweight glass cloth and ZAP Epoxy Finishing Resin. It's not cheap but you get what you pay for because it sets up very hard and sands like a dream.
DM

Subculture · « **Reply #18 on:** January 22, 2015, 12:43:09 pm »

There's nothing new about epoxy resins, they've been around about the same amount of time as polyester resins. Polyester got the edge on price, so epoxies tended to be regarded as more exotic as they were used more in the aerospace industry.

The Lotus Elite (circa 1959) used epoxy resin for the doors, although the rest of the shell was moulded in polyester resin, which reduced cost where the higher performance wasn't required.

One thing you do need to bear in mind with epoxy is that you need room temperature or higher for the resin to cure properly. Polyesters can be made to cure in quite cold conditions with the right catalyst, but with epoxies, no dice.

Fortunately they don't pong in the way polyester does, so you can often bring the project indoors for curing

Mike0001 · « **Reply #19 on:** January 22, 2015, 01:12:50 pm »

another question before I purchase, as a cheaper alternative would damp seal do same job ?

if not call me a cheapskate

Colin Bishop · « **Reply #20 on:** January 22, 2015, 02:25:39 pm »

G4 one part polyurethane pond lining resin is good stuff and sometimes referred to as damp seal, looks like treacle but uses dampness to cure right down to freezing level. Very handy on some internal bilge repairs I did during the winter on my full size boat some year ago. However it's probably just as expensive as epoxy in the quantities you are looking for.
http://www.ecfibreglasssupplies.co.uk/p-1687-g4-pond-seal.aspx

Colin

inertia · « **Reply #21 on:** January 22, 2015, 02:38:40 pm »

Just exactly how cheap do you want this stuff? http://www.ecfibreglasssupplies.co.uk/p-2808-low-cost-re-blended-polyester-resin-including-catalyst.aspx
DM

jarvo · « **Reply #22 on:** January 22, 2015, 09:17:54 pm »

HI Mike

Dont be silly when it comes to sealants etc. Get decent stuff and do the job once, buy cheap or dodgy, pay again or strugle to finnish.

My post about easycomposites came as a result of talking to people in the Aeromodeling field,

Mike0001 · « **Reply #23 on:** January 30, 2015, 09:45:01 am »

so bought epoxy coating resin in pack 2 to 1 mix

has to be 20 degrees to go off, not sure if I want to do this in the house though as its pretty pungent smell

-1 here at moment so on hold for time being

jarvo · « **Reply #24 on:** January 30, 2015, 10:00:45 am »

HI Mike

Are you sure you bought epoxy as ot dont usualy smell much, you are right about ambiant temperature, needs to be warm to go off properly

Mark

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Author Topic: fibreglass resin (Read 9141 times)

Mike0001

inertia

Mike0001

Mike0001

Mike0001

inertia

Mike0001

inertia

Mike0001