Bedding Down Stone Resin Shower Tray

[alba2]

I have just taken delivery of a Fresssh 760mm x 760mm x 55mm stone resin tray.
The tray is constructed from a limestone and resin composite and weighs 12 kgs.
I have read through the installation instructions and all it says "use a silicon sealant to secure the tray in position". There is no mention of bedding the tray down in cement.
When the tray is flat on the floor the outer edge is approx 5 mm above the floor all the way round.
I am concerned that due to the light weight I may get movement just using silicon.
Should I bed it down in a 5/1 cement mix?
If so, at what thickness, and should I fill the cavities with cement?

 

[gday2uk]

I have read through the installation instructions and all it says "use a silicon sealant to secure the tray in position". There is no mention of bedding the tray down in cement.

 

[alba2]

This site has numerous comments about the need to bed stone/resin trays in cement, and to avoid simply using silicone.
Despite the instructions, would it be safer/stronger to bed this tray in cement?

 

[wreckedit]

Try a bit of plasticiser in the mix to help spread.

I found this //www.diynot.com/forums/viewtopic.php?t=168567