The Hoff

iTrader: (5)

I have made some moulds for a sub install (350z, not scooby) using glassfibre. I am nearly ready to start making the acutal boxes now but not sure what to use as a release agent for coating the inside of the mold.

I have been told that a layer of PVA glue does the trick or even vaseline brushed on with a paint brush does the job?

Any advise welcomed.

Thanks, The Hoff

mart360

meguairs (sp) release wax, thats what we used to use when making lifeboats.


Mart

OllyK

CFS Fibreglass Supplies Release Agents

mart360

never heard of vaseline being used, i,d have thought it would play havoc with the gelcoat

mart

Leslie

I bet that Masons will stock what you need.

Les

The Hoff

iTrader: (5)

Thanks for the responses!

Am checking out local supplier of Meguairs now.

Wont be using a gel coat at the sub box is never on view, just plain matting and resin.

May also try local masons.

Cheers!

cookstar

iTrader: (6)

A-B-W make quite a few moulds (bumpers etc), might be worth asking them what they use.

David Lock

Carnauba wax?

The Hoff

iTrader: (5)

Just got some Devcon release agent from work that they no longer require. Should do the job nicely.

hoskib

iTrader: (1)

won't the lack of gel coat reduce the strength of the sub box? it's gonna take a pounding so unless you go mental with the number of layers you might get cracking?

we use a brush on wax demoulant from a company called axson technologies, for tricky corners and hard to reach bits we use a spray on wax called macwax.

not sure what your experience is with moulds so forgive me if i'm trying to tell you how to suck eggs but what is the finish of your mould? in other words is it non-porous as you need to seal it if it isn't

The Hoff

iTrader: (5)

Done a few glass fibre builds in the past for my old Reault 5 and Scooby but never used a gel coat. Normally I just smoothed it with P38, sanded it down, primed it is and sprayed it.

I have heard of gel coats but never known why they are required apart from a pre coloured finish.

Leslie

I used to do all that sort of thing-when I still had the energy.

Les

hoskib

iTrader: (1)

in a nutshell if you made a mould off one of your finished shapes/box then copies out of the mould would be made with a gel coat backed up with fibreglass.
the reason for this is when you rub up anything that hasn't had a gel coat you get little 'whiskers' of fibreglass poking through, so if you don't want these seen when you paint it you have to fill over. so you're kind of doing everything twice.

all depends if you're doing one off stuff or a few copies

great looking work from your pics, love the colour scheme your boot must have stunk like a TVR for ages