coolant leak from top hose engine mount ,

[jpliddy]

hi all
i have a slight coolant leak from top hose engine mount, is this common on these cars being there age and milage now?
there is no leaks when engine is hot but after last nights frost there is coolant leaking running down and along the head gasket its a tiny amount at the moment
if it is the the fitting is just bolted on to the cylinder head with 2 allen key bolts
do you recommend a set way of going about this or using a sealant joining compound
regards jim