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Hanaldo
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Group: Forum Members
Posts: 2.5K,
Visits: 28K
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+xWhen I mould parts with Duratec as an in mould coating I still also spray a clear polyurethane on the finished parts too. Yeh agreed, this is the best way. The Duratec gives a nice non-porous surface to sand and apply the polyurethane to, and the polyurethane provides the UV protection. Unfortunately it is also the most costly and labour intensive, as well as the heaviest option.
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Fasta
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Group: Forum Members
Posts: 468,
Visits: 3.5K
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When I mould parts with Duratec as an in mould coating I still also spray a clear polyurethane on the finished parts too.
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carbon man
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Group: Awaiting Activation
Posts: 86,
Visits: 1.2K
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+x+x+x+x+x+xIs it possible to spray 2k clear into uni mould surface wait to dry and then use epoxy infusion resin? Yes you can but I have found that due to it being reasonably thin it can pre release off the mould in places and suck into the weave which kind of ruins the mould finish. I use Duratec sunshield clear for this purpose as it is a thicker and stronger surface than paints that will remain on the mould surface during vaccum and infusion. Thanks I'm desperate to find a UK alternative of duratec sunshield That would be Scott Bader Glosscoat. Not quite as good as the Duratec, but will effectively achieve the same thing and work very much the same way. Be wary of using regular 2k polyurethanes as inmould coatings, some of them work, many of them don't. The big issue I found with a lot of them is they appear to work, but will delaminate at some point after demoulding. Whether that happens immediately when demoulding, or when trimming, or weeks after demoulding etc, depends on the specific coating. In my mind, unless you have one that you know works for sure, then it's a really risky game and not worth playing. Ok, does duratec sunshield have any UV stability. Because you said the gloss coat had zero. Thinking out side the box here haha, could I use easy gc50 and add 25% of gloss coat in with it? In the thought I'd get uv values from gc50 but might level n nicer with a bit of gloss coat in Thanks No, Sunshield is just as terrible with UV, despite its name. If you want UV protection, it has to be a polyurethane. And if you want a polyurethane, your best bet is to post-finish. You could potentially mix the GC50 with the Glosscoat, they are both polyesters so will probably play nice together. What the result is in the end, who knows. You're in experimental territory, so I'd give it a go but be cautious and do lots of testing before committing to anything. OK, that's annoying of duratec adverting the product as very good uv! I think clear coating the parts after is the only way. Is polyurethane different to 2k acrylic clear?
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Hanaldo
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Group: Forum Members
Posts: 2.5K,
Visits: 28K
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+x+x+x+x+xIs it possible to spray 2k clear into uni mould surface wait to dry and then use epoxy infusion resin? Yes you can but I have found that due to it being reasonably thin it can pre release off the mould in places and suck into the weave which kind of ruins the mould finish. I use Duratec sunshield clear for this purpose as it is a thicker and stronger surface than paints that will remain on the mould surface during vaccum and infusion. Thanks I'm desperate to find a UK alternative of duratec sunshield That would be Scott Bader Glosscoat. Not quite as good as the Duratec, but will effectively achieve the same thing and work very much the same way. Be wary of using regular 2k polyurethanes as inmould coatings, some of them work, many of them don't. The big issue I found with a lot of them is they appear to work, but will delaminate at some point after demoulding. Whether that happens immediately when demoulding, or when trimming, or weeks after demoulding etc, depends on the specific coating. In my mind, unless you have one that you know works for sure, then it's a really risky game and not worth playing. Ok, does duratec sunshield have any UV stability. Because you said the gloss coat had zero. Thinking out side the box here haha, could I use easy gc50 and add 25% of gloss coat in with it? In the thought I'd get uv values from gc50 but might level n nicer with a bit of gloss coat in Thanks No, Sunshield is just as terrible with UV, despite its name. If you want UV protection, it has to be a polyurethane. And if you want a polyurethane, your best bet is to post-finish. You could potentially mix the GC50 with the Glosscoat, they are both polyesters so will probably play nice together. What the result is in the end, who knows. You're in experimental territory, so I'd give it a go but be cautious and do lots of testing before committing to anything.
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carbon man
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Group: Awaiting Activation
Posts: 86,
Visits: 1.2K
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+x+x+x+xIs it possible to spray 2k clear into uni mould surface wait to dry and then use epoxy infusion resin? Yes you can but I have found that due to it being reasonably thin it can pre release off the mould in places and suck into the weave which kind of ruins the mould finish. I use Duratec sunshield clear for this purpose as it is a thicker and stronger surface than paints that will remain on the mould surface during vaccum and infusion. Thanks I'm desperate to find a UK alternative of duratec sunshield That would be Scott Bader Glosscoat. Not quite as good as the Duratec, but will effectively achieve the same thing and work very much the same way. Be wary of using regular 2k polyurethanes as inmould coatings, some of them work, many of them don't. The big issue I found with a lot of them is they appear to work, but will delaminate at some point after demoulding. Whether that happens immediately when demoulding, or when trimming, or weeks after demoulding etc, depends on the specific coating. In my mind, unless you have one that you know works for sure, then it's a really risky game and not worth playing. Ok, does duratec sunshield have any UV stability. Because you said the gloss coat had zero. Thinking out side the box here haha, could I use easy gc50 and add 25% of gloss coat in with it? In the thought I'd get uv values from gc50 but might level n nicer with a bit of gloss coat in Thanks
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Hanaldo
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Group: Forum Members
Posts: 2.5K,
Visits: 28K
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+x+x+xIs it possible to spray 2k clear into uni mould surface wait to dry and then use epoxy infusion resin? Yes you can but I have found that due to it being reasonably thin it can pre release off the mould in places and suck into the weave which kind of ruins the mould finish. I use Duratec sunshield clear for this purpose as it is a thicker and stronger surface than paints that will remain on the mould surface during vaccum and infusion. Thanks I'm desperate to find a UK alternative of duratec sunshield That would be Scott Bader Glosscoat. Not quite as good as the Duratec, but will effectively achieve the same thing and work very much the same way. Be wary of using regular 2k polyurethanes as inmould coatings, some of them work, many of them don't. The big issue I found with a lot of them is they appear to work, but will delaminate at some point after demoulding. Whether that happens immediately when demoulding, or when trimming, or weeks after demoulding etc, depends on the specific coating. In my mind, unless you have one that you know works for sure, then it's a really risky game and not worth playing.
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carbon man
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Group: Awaiting Activation
Posts: 86,
Visits: 1.2K
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+x+xIs it possible to spray 2k clear into uni mould surface wait to dry and then use epoxy infusion resin? Yes you can but I have found that due to it being reasonably thin it can pre release off the mould in places and suck into the weave which kind of ruins the mould finish. I use Duratec sunshield clear for this purpose as it is a thicker and stronger surface than paints that will remain on the mould surface during vaccum and infusion. Thanks I'm desperate to find a UK alternative of duratec sunshield
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Fasta
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Group: Forum Members
Posts: 468,
Visits: 3.5K
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+xIs it possible to spray 2k clear into uni mould surface wait to dry and then use epoxy infusion resin? Yes you can but I have found that due to it being reasonably thin it can pre release off the mould in places and suck into the weave which kind of ruins the mould finish. I use Duratec sunshield clear for this purpose as it is a thicker and stronger surface than paints that will remain on the mould surface during vaccum and infusion.
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carbon man
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Group: Awaiting Activation
Posts: 86,
Visits: 1.2K
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Is it possible to spray 2k clear into uni mould surface wait to dry and then use epoxy infusion resin?
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