Welcome to Swiss-seal. We sell sealer for block paving , Indian stone, natural stone, concrete paving and concrete, this is a necessary and a must if you have pattern imprinted concrete (or pics / impregnated concrete as it is better know). All types of driveway and patio surfaces benefit from clear concrete sealers these are, block paving, Indian stone, natural stone, concrete paving slabs, concrete flags that are coloured, garage floors, concrete and most types of slab concrete that need to be waterproofed or dust proofed against oil, dirt, grease, moss and weeds. Block paving sealer and Concrete sealer has many uses, it reduces the wear of your concrete, it stops water from entering the surface, it stops the loss of the colour on the imprinted concrete surface by wearing away the concrete sealer and not the concrete colour, it stops the growth of algae and weeds. It protects wet concrete and block paving against frost thus stopping eventual shailing and flaking of the concrete. Block paving sealers also stop contamination from car fuel, diesel oil & engine oil from impregnating the concrete surface, concrete sealants also can have the added benefit of making the surface anti-slip.