Warm the whipped cream in a pot. In a second wide pot, melt sugar and 10 tablespoons of water until a golden yellow caramel is formed. Add the warm cream carefully while stirring, then bring to the boil and simmer for about 3 minutes until the caramel has dissolved. Let the caramel cream cool down for about 5 minutes. Stir butter in pieces and sea salt into the cream. Let the sauce cool down while stirring occasionally.