Fastoseal 2812 is water based internal membrane forming sealer to waterproof Portland cement concrete. Going below the concrete surface and reacting with the free lime and alkali forming insoluble calcium silicate crystals which “blocks” moisture from migrating to the surface through the capillary pores of concrete while allowing the concrete to breathe. Fastoseal 2812 is deep penetrating concrete sealer and degreaser. Fastoseal 2812 is based on silicate which is proved as one of the best
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