Thor, or should that be Zeus?

[Clive S]

I have 2 requirements. The first is to hold M12 nuts in place that allow me to tighten the bolts holding the rails in place.

Secondary is similar where ill either sink nuts for holding and mount hardware the same way (motor mounts etc) or where Ill epoxy thread bar in place. My preference is to sink the nuts so I can use bolts from the top.

I don't think you will have enough purchase with the nuts as they might pull out, also think about getting epoxy in the threads and the bolt will have to go right through the nut into some pocket or other. If you look at the chart on the http://www.ebay.co.uk/itm/ANCHORSET-...c=1&rmvSB=true

it shows how deep the hole should be for a 10mm rod

Re the colour I have to pass but you could phone Sika up and ask their techy guys.