Polysaccharide containing composition useful in forming protective film on surfaces selected from concrete, metal, stone, glass, wood, cloth, tissue, weave and paper

A process for the preparation of a polysaccharide composition suitable for protection of surfaces comprising:

• a) mixing a first component (A) being a high molecular weight polysaccharide or a mixture of high molecular weight polysaccharides having an average molecular weight Mw of at least 100 000, and being capable of forming a gel, and a second component (B) being a low molecular weight polysaccharide or a mixture of low molecular weight polysaccharides having an average molecular weight Mw of about 400-75 000, and being capable of inhibiting gel formation of A, water, and optionally other components, such that when said composition is applied onto a substrate surface and is allowed to dry, a film will be formed from the composition via at least partial gel formation, wherein the weight ratio between A and B is in the range of from 5:1 to 1:50 based on polysaccharide dry weight, and the total concentration of A+B in the composition is in the range of 0.1-30% (w/v) based on polysaccharide dry weight, wherein B is selected from the group consisting of guar gum, locust bean gum, and mixtures thereof,
• b) heating the mixture of a) to a temperature of at least 80° C. to dissolve components A and B and optionally other components in the water, and
• c) allowing the solution obtained in b) to cool down to room temperature.