# 2 making a fibreglass mould using optimold tooling resin

This is the second in a series of three videos demonstrating how to make a GRP mould using optimold low shrinkage tooling resin.
www.ecfibreglasssupplies.co.uk

Category:

Education

Tags:

• fibreglass
• grp
• resin
• optimold
• mould
• fiberglass
• gelcoat
• tooling
• polyester

[chittychad18]

shouldn't you be adding fiberglass to the inside of the mold? with the mold layer you kinda just made the part bigger...

[ecfibreglassuk]

@chittychad18 Hi This is not a part this is the process of making the actual mould from a plug

Kind rgds martin

[no1rickshawracer]

Hi I have heard that applying tooling gel by brush can cause shrinkage, is this correct?

[ecfibreglassuk]

the 14PA we use is designed for brush application - usually

thinning gelcoats down with styrene to make them sprayable leads to higher

shrinkage and more tendancy to pre release.

Viny ester gelcoats contain more styrene compared to conventional Iso or

Iso / NPG types so can be more likely to pre release particularly if

applied too thickly in corners etc.

Rgds ecfibreglassuk

[tomiboykitt]

whats the song?

[ecfibreglassuk]

song by Mark Ransom

Song:Stride

Album:Stride

rgds ecfibreglassuk

[thisboi1]

@chittychad18 can I use any cloth to fiberglass with?

[thisboi1]

Can I use any cloth to fiberglass,like cotton or does it have to be fiberglass cloth?

[robotmotor]

please help i use gelcoat but he make brush marks ?!! waht i will do ?

[almirlima07]

Muito legal o trabalho

[kingoftheput]

Could you please tell me the full name of gel coat you use. And name of factory that produce it. (I can't find it in stores in my country so I could try to find it on online stores). And what do .you use to prevent gel coat to stick on mould. Thank you