Maximum time between Uni-Mould Tooling Gelcoat & Uni-Mould Coupling Coat

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Maximum time between Uni-Mould Tooling Gelcoat & Uni-Mould Coupling Coat

Author	Message
Hanaldo	Hanaldo posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	It's not as much of a problem to not do the main reinforcement within the 'window' of the skin coat. Ideally you would laminate it within 24 hours, however if that can't be done then you can simply scuff up the skin coat layer with a bit of 60 grit sand paper to give the tooling resin some mechanical adhesion, and clean it with acetone before laminating.
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RyanParle	RyanParle posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 20, Visits: 1.2K	Thanks Hanaldo. It took me quite a bit longer to add the barriers to my pattern, so I didn't have the time to apply the Gel Coat. I'll get the Gel Coat applied on Friday, hopefully the Coupling Coat & 100g CSM too, then finish off with the Tooling Resin &450g CSM on Saturday. I am considering making a start on the second part of the mould on Sunday, I would probably have time to Apply the Gel Coat, Coupling Coat & 100g CSM but then I would not be able to apply the Tooling Resin & 450g CSM until the following Wednesday, Will that be ok? It is possible that I could go to the workshop on Monday after work, but this is not ideal as I work long shifts & do not have much time in the evenings.
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Hanaldo	Hanaldo posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	Ideally not. Ideally you would apply the coupling coat at the 'tack-free' stage, so after 2-4 hours depending on temperature. That said, the Unimould tooling gelcoat should be an air-inhibited cure, so it should remain open to bonding for a good amount of time. However I would suggest that your time frame will be too long. Not only does it leave the surface vulnerable to collecting dust and other contaminates that will affect any mechanical bond, but 72 hours is a long time for the gelcoat and it may cure to a stage where it is no longer open to bonding. I would wait until Thursday night at the earliest, I wouldn't suggest leaving it any longer than 24 hours. Edited 8 Years Ago by Hanaldo
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RyanParle	RyanParle posted 8 Years Ago HOT Topic Details
Group: Forum Members Posts: 20, Visits: 1.2K	I am about to start a 2 piece mould and would like to know if there is a maximum time between applying the Tooling Gelcoat & Coupling Coat? I hope to apply the Tooling Gelcoat tomorrow (Tuesday) and then on Friday apply the Coupling Coat, followed by the Tooling Resin. Will this be OK?
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