In order to keep the stone masonry free from damp, efflorescence, frost action, etc., colourless waterproofing materials is applied waterproofing materials obtained from heavy petroleum distillates, oils or in soluble soaps are best. It is difficult to waterproof very closely textured stones. Waterproofing materials substances containing resins are not suitable for fine-textured stonework. Waterproofing causes some dislocation which goes from the stones in course of time.
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