CRL GE® SilPruf® is a one-part, neutral cure silicone sealant for use in most common weatherproofing applications on a wide variety of materials. After application, the sealant reacts with atmospheric moisture to produce a low-modulus, long life, formed-in-place silicone rubber building joint and glazing sealant. It seals assemblies of metals, masonry, concrete, coated surfaces, plastics, wood, and other common building materials. SilPruf® is specially designed for use in butt joints or lap shear joints in weatherproofing and glazing applications subject to movement. In order to help you better select the correct sealant, we have put together a Silicone and Sealant Selector Chart. You need to have Adobe Acrobat Reader installed in order to view this chart.