140-1000 CRYSTAL CLEAR WATERPROOFING CABOT GAL | Cabot waterproofing is an advanced technology silicone sealer that provides unsurpassed waterproofing protection to a multitude of surfaces. This convenient and simple-to-use formulation penetrates and fills the pores of the substrate with a premium-grade silicone sealer and unlike waxes, silicone will impart a lasting repellency to any surface to which it is applied.