Extreme Climate exterior water seal was developed with the structural waterproofing professional in mind, to solve those intractable penetrating damp problems that standard masonry sealing products were failing to overcome. So, we ignored the existing wisdom on costs and simply used the best liquid waterproofing technology available, to make an exceptional damp wall sealer. Customer feedback is almost unanimous, that Extreme Climate has saved many times its price compared to wasted diagnosis efforts and repeat repairs with cheaper alternatives.Extreme Climate performs time and again, where other masonry water repellents have failed, especially in coastal or upland locations. • Stops lateral penetrating damp• Brush or spray applied it is 100% breathable• 10-year exterior sealant lifespan• Invisible when cured• Brick sealant, stone sealant and mortar joint sealant in one easy application• Protects masonry from the effects of the freeze/thaw cycle• Controls the emergence of white salt staining on masonry• Improves energy efficiency by reducing evaporative heat lossThe practical applications are numerous and diverse:• Sealant for stone walls, brick walls and even concrete• Protects exposed gable elevations from driving rain• Clear water-proofer for new lime mortar pointing• Solves leaks in porous sandstone• Stops ingress around stone lintels• Leaks in window reveals• Suppresses unsightly efflorescence on new builds• Seals problem chimney structures• Controls moss and mould growth on walls• Seals limestone without the darkening associated with conventional treatments• Succeeds where other brick and stone sealers have failed• Outperforms damp wall paints, whilst also preserving the original texture.