I am doing high gloss and sattin finish carbon fiber sheets using glass plates and aluminium sheets as negativ surface.
While the satin sheets just fall of the alumium after cureing the other ones stuck to the glass and have to be peeled off.

In the beginning, more renewed layers help, but at some point the point is reached that the sheets can only be removed with fine fine cracks in the surface because they are that strongly stuck to the glass plate.
The problem arises with increasing age of the release agent, however regardless of the specified shelf life?! The last bottle of 'Easy-Lease Chemical Release Agent' was ordered on March 22. Batch sticker says: ELRA-01  4173-19 
With this bottle the problem occurred from the beginning. Of course the surface was first cleaned with Easy-Lease Mould Cleaner.

I know glass as surface can be tricky but over the last 1 1/2 years I also got many remarkables results using 'xc110' in combination with the 'Easy-Lease Chemical Release Agent'.
But all sheets with cracks in the surface cannot be used for further production in my company, they have to be sorted out. This is extremely annoying in terms of the value of the wasted material and especially the work involved.
I hope you can help.

HI,

Sorry to hear you've been having problems.  Checked the batch number and the ELRA is still well within date, so unless its been opened or the cap not tightened fully, I would still expect it to work well.

A few things I don't quite understand from your description - probably lost a little in translation.


You mention a satin and gloss finish sheets -  you mention the satin sheets release fine but not the gloss?  Is this with same release agent batch and same application etc? 

When you say the release properties fall away in time, is this after repeated applications of release agent?

As you say, Glass can be difficult to work with.  However, a good coating of EasyLease should release very well.  It could be possible that repeated applications are building up too much and then either coming away or not working properly. That can happen on normal mould surfaces, the build up can feel slightly tacky and just not work as well.  Usually an acetone or Mould cleaner wipe down to remove all traces and starting from scratch will help.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant