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[NottsRog]

Hi
Can anyone answer this?
I have bought a weenip kit,  and have watched thru the video on construction
It states to waterproof the hull inside n out with "Resin"  and the video show soemone applying a clear looking runny liquid with a paint brush
It then shows some white powder being added to bulk up the resin and this is then poked into the wood joints to form an adhesive bond?

It doesnt mention anything about exactly what type of resin it is neither a trade name nor a generic name

So my question is .. what exactly is this resin and does anyone have any recommendations as to particular products and suppliers/retailers

Thanks NottsRog

[Peter Fitness]

I use resin designed for use with fibreglass, to waterproof the inside of a hull. It's available from fibreglass suppliers - at least, it is here in Australia.

Peter.

[Jerry C]

It is important that you use epoxy resin for sealing etc as this will adhere to just about anything, alot of people think of Araldite or z poxy type products in the little tubes but It can be bought more cheaply in larger volume from fibreglass suppliers or marine repair places, west system is great but expensive, I find R180 epoxy rexin in a 1kilo kit to be quite reasonable and goes a long way.
I wouldnt reccomend using polyester resin as It only really adheres well to itself like when laying up hulls.
To thicken or bulk up the resin you can either buy the proper stuff (microballoons) or common talcom powder works just fine.

[exvtop]

This is the sort of thing they mean :- http://www.fibretechgb.com/products/finishing-epoxy-resin-hardener

The "white powder" is microballoons like these :- http://www.fibretechgb.com/categories/additives-resin to bulk out the resin for use as a filler and to make it sandable if required.

Cheaper versions may be available elsewhere.

Mike

[Norseman]

Hi NottsRog

I'm new to this too - so check anything I say before following up.

I haven't sealed a hull but over the last few daysI have used some epoxy resin around a propshaft etc.
There are different speeds of drying for different tasks, I bought 5 and 30 minute.
It comes as two pack and you mix equal amounts - and room temperature is important to consider.
Not much info there but it's something for Newbies like us to consider 
Oh - and as I found out you have to plan the order of use because it will flow 

I also bought some Aliphatic  (yellow glue) on a reccommendation but forgot what it was for. So I asked.
........... now I'm asking a guy who owns a model shop that relies on people like us getting hooked on the hobby
and buying product ............. 'gluing' he said. While I was there he sold another guy a handful of small parts but
didn't want to give him a bag, ................ and amazingly he was offish with a guy asking about a big and costly
tank kit. I won't be going back despite his shop being well stocked; mainly because I felt like an idiot 

Anyway what are you constructing/sealing?

Regards Dave

[Colin Bishop]

Aliphatic is a woodworking glue. Good stuff, dries hard and is effectively waterproof. You can clean off the excess with water before it dries.

Colin

[Daemon]

yeah, aliphatic is normally used for waterproofing interior woodwork (especially in non-fibreglass/GRP hulls)

as for Resin - yeah, you want the Epoxy type, but be careful what you mix it in, as some of them (especially with larger amounts) can get very hot when you mix them. I would suggest a yoghurt pot (muller-light is ideal) for small amounts, but you will want something a bit bigger for larger amounts. That being said, it might be a good idea to use smaller amounts, especially if you are epoxy-ing a large area.

D

[rmaddock]

Hello!

We built a Wee Nip this year (my son and I). We used epoxy resin that we bought from Halfords. It's intended for car body repair and you boy it in 1/2l sort of sized tins along with a little sachet of the other chemical.  It worked perfectly well for what we wanted and it's easily available without having to go to a specialist.

As for the filler part, we used 'micro balloons' which we got from a model shop. However, I've since discovered that many "real" boat builders use flour.....yes, the sort you bake bread and cake with.  You simply mix flour in until you have a paste that won't run out of the corners where you want it.

I hope that helps...part of the point of the Wee Nip is that you don't go and spend a fortune on the "proper" stuff.

TTFN.

Robert

[John W E]

hi all

After reading the last couple of posts, may I add some thoughts

There is a vast difference chemically between Epoxy and Polyester resins - these are too numerous to mention in a single thread.   Basically though, to keep it very simple

A Polyester resin sets/goes off due to a chemical reaction producing heat, and this sets the resin.  This one is also very susceptible when curing/hardening with the control of the surrounding area temperature - it mustn't be below 10 degrees; also it isn't 100% waterproof when set.   It will absorb water, if it is continually submerged in water for 2-3 days.

Epoxy resins use a pure chemical reaction (generating very little heat) to produce the hardening of the resin.  This one is not so prone to temperatures which surround it whilst mixing/applying etc./ working with the resin - and also setting.   Some epoxy resins cure/go off with a temperature as low as 2 or 3 degrees (mind you, these are very specialised epoxies).   The majority of these resins are near enough 99.9% waterproof.   The only downside to them really is to health - because some of them can cause some nasty side effects.

As far as filling mistakes or gaps in hulls - yes you can mix talcum powder/French chalk to thicken it to use as a filler - but the majority of car body fillers which are purchased from auto-shops do the job just as good if not better, and also a bit cheaper maybe.

If you have a look in the masterclass builds, you can see several topics where polyester resins along with tissue mat has been applied to the exterior of hulls to produce a waterproof barrier also along with epoxy resins on other masterclass builds.

Hope this is of some help.

Aye
john

[Subculture]

Epoxy is almost odourless which is an advantage to promote domestic harmony.

It's also a bit thinner usually than polyester resin, so soaks into the wood better.