I've tried that, have moved the reqrites around in all possible combinations, tried it as RewriteRule ^product/fibre-optic-curing-systems\$ "http\:\/\/www\.domain\.com\/product\/field\--in-situ\-curing\-system\" [R=301,L] and none of them work....
Have attached the front end page... the only thing I can think of is the base href reference but thats needed to reference the right path....