Bubbles in Xencast

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Bubbles in Xencast

Bubbles in Xencast

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moeggesit	m moeggesit posted 6 Years Ago HOT Topic Details
m Group: Forum Members Posts: 4, Visits: 9	Hi, How can I avoid bubbles in the castings when using Xencast (currently general purpose)? The mould is dry but there are always bubbles present, often on the surface ruining the castings. Many Thanks
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moeggesit	m moeggesit posted 6 Years Ago HOT Post Details
m Group: Forum Members Posts: 4, Visits: 9	+x Warren (Staff) - 2/12/2019 9:56:07 AM I would say 15C or below is low. Ideally 20C is the ballpark for most resins to perform at their best. It is unusual for their to be a lot of bubbles in the P2 resin system , hence Rich asking if you had P6 as the P6 is more moisture and mixing sensitive. The P2 is fairly forgiving as fast cast PU resins go, however it can still be effected by moisture and mixing issues. Everything is done at an ambient of approx. 20C using dry plastic containers so there should not be any moisture. It's stirred to avoid ingress of bubbles. Would it help to warm it up before or during mixing/casting? Should the silicone moulds be heated to release moisture? How do you remove moisture? How do you mix without introducing bubbles. The bubbles form during curing process and is consistent throughout the final mould.
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Bubbles in Xencast

moeggesit - 6 Years Ago

It depends on the cause. Humidity can cause the P2 to have bubbles in as can low temperatures. Be sure to have thoroughly mixed the sediment into the mixture before using the resin and also giving it...

Warren (Staff) - 6 Years Ago

Warren, Thank you, what is considered low temperature and what would be the ideal temperature? Is there another fairly ridged resin that would give a better finish/ consistency and a opaque...

moeggesit - 6 Years Ago

Just to check, is this Xencast P2 or P6?

Rich (Staff) - 6 Years Ago

Rich, It is P2 and otherwise perfect for the application. I don't actually mind which one as long as it does not have bubbles in it! Is there normally bubbles present in the P2 or is it a defect...

moeggesit - 6 Years Ago

I would say 15C or below is low. Ideally 20C is the ballpark for most resins to perform at their best. It is unusual for their to be a lot of bubbles in the P2 resin system , hence Rich asking if yo...

Warren (Staff) - 6 Years Ago

Everything is done at an ambient of approx. 20C using dry plastic containers so there should not be any moisture. It's stirred to avoid ingress of bubbles. Would it help to warm it up before or durin...

moeggesit - 6 Years Ago

Sometimes this time of year, condensation cure moulds can end up with a bit of moisture in them. If warmed up to room temperature then they should not be a problem.

Warren (Staff) - 6 Years Ago

Hi I am having problems with bubbles in my Xencast P6 castings. I read through the forum for answers first, and can confirm that the temperature and humidity would seem normal, as I am doing the...

Jimmyb - 5 Years Ago

The shelf life of the P6 is 6 months so at 2 years old, age of the product could almost certainly be the issue.

Warren (Staff) - 5 Years Ago

Warren, many thanks, looks like its time to buy a fresh batch. P.S. I there a date best before or similar on the package, i don't seem to be able to locate one.

Jimmyb - 5 Years Ago

We can trace an exact expiry date through the batch number but for this resin it is 6 months from date of manufacture which, due to us having very short turnaround times means you can assume 6 months...

Warren (Staff) - 5 Years Ago

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