Hi,
I am hoping to lay a 2msq section of Glasscast 10 over some old records on a floor. I need to have an edge on one side – what is the best way to form a barrier to stop the resin flowing out of the area I want to cover? I don’t necessarily want to create a mould for the whole area just the edge along one side – make sense?
What is the best product to form a barrier? I presume a piece of wood wouldn’t work?
Many thanks.

A strip of rigid polypropylene would work well.  You could hot melt glue it in place, then seal any gaps with silicone sealant.  if its a bit too floppy then use a wooden batten behind it to hold it in place.

Once the resin has cured, the polypropylene will easily peel off the edge as epoxy does not stick to polypropylene.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Many thanks Warren - great advice! Will bang in an order tomorrow...!

Can also just use a piece of wood covered with flashbreaker tape. Bit riskier than polypropylene, as any resin bleed under the tape and into the wood will bond the wood to your floor, so you need to be sure the tape is stuck down well. But with a clean piece of wood this is quite easy.

My personal preference would still be Warren's suggested method, but in case you were looking for a simpler/cheaper method.

Another thing I have noticed, You are saying you want to use GlassCast 10 on the floor.  GlassCast 3 is a better option - even if you want a 10mm thick pour - because it naturally lays flatter and has a slightly smoother finish.  If you are machine sanding the floor anyway afterwards then it is not an issue however if you want to leave the finish as it naturally lays, then the GlassCast 3 will give a smoother finish.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Superb advice!
Thanks for the help guys - really DO appreciate it.