Guard Hardener W (water repellent) is a water based impregnating sealer for mineralising and treating efflorescence, saltpetre, friable materials damaged by intrusion of water, damp, frost...

• Guard Hardener W penetrates friable materials certainly to crystallise, harden and mineralise. Once treated, materials become more resistant to degradations. Guard Hardener W can also be used as an anti-dusting treatment.

• Guard Hardener W also has excellent water-repellent properties that help to prevent main causes of degradation such as infiltrations, acid rains, erosion, freeze-thaw cycles, development of micro-organisms, saltpetre, efflorescences...

• Guard Hardener W is a non film-forming water based impregnating sealer. Substrates remain permeable to air and water vapour. It is completely colourless after application and does not change the appearance or the composition of the treated surface. It is also UV-resistant and does not discolor with age.

• Guard Hardener W can be used indoors and outdoors on facades, walls, roofings, floors, screeds and on all porous materials: cement, plaster, concrete, natural stone, brick, rendering...