Material
Silicone
Style
Sausage
Compatible Material
Aluminum, Glass, Concrete
Water Resistance Level
Waterproof
Item Form
Paste
 
 
Dow Corning® Contractors Weatherproofing Sealant:
 
Medium-modulus silicone joint sealant APPLICATIONS :
 
Sealing dynamically moving joints such as expansion and control joints, concrete panel joints, tilt-up panel joints, curtainwall joints, perimeter caulking (windows, doors, panels, EIFS, bedding of mullions, panels, and frames, etc.)
 
DESCRIPTION Dow Corning® Contractors Weatherproofing Sealant is primerless on most common nonporous building substrates. This unique weatherresistant for­mu­lation possesses a balanced adhesive strength, medium mod­ulus, and high recovery, making it ideal to withstand adverse con­ditions in common instal­la­tions including moisture, move­ment, sheer, and de-flection. It is easily gunnable in all weather conditions from -29 to 49°C (-20 to 120°F). Because it requires no mixing and a smaller joint ratio, it is an economical, high-performance alternative to other sealant options with a ±40 percent movement
capability
 
Dow Corning Contractors Weatherproofing Sealant is available in 20 standard stocked colors (white, limestone, gray, window bronze, sandstone, aluminum, antique white, charcoal, black, bronze, precast white, off white, ivory, buff, mountain fog, anodized aluminum, sandalwood, geographic beige, redwood tan, light bronze) and 19 made-to-order special colors. Custom colors are also available
 
Surface Preparation The joint interface must be clean, dry and free from oils, loose mortar, laitance, form release agents, waterproofings, dampproofings, and other contaminants. A thorough wire brushing, grinding, sandblasting, or solvent cleaning may be required to expose clean, sound, virgin surface.
 
Priming Primer should be applied before installing the backer rod. Applying a bead of silicone sealant to the substrate material to test adhesion prior to general use is always recommended. Dow Corning Contractors Weatherproofing Sealant is primerless on most common nonporous build­ing substrates. Consult Dow Corning for priming recom­mendations on other materials. In all cases, a sample should be tested and/or test joints should be installed on the project
 
Masking Areas adjacent to joints should be masked to ensure neat sealant lines and to avoid contact with polished granites, metal, or glass. Do not allow masking tape to touch clean surfaces on which the sealant is to adhere. Masking should be removed immediately after tooling.
 
Application Install backer material or joint filler, setting blocks, spacer shims, and tapes as specified. Apply sealant in a contin­uous operation, using a positive pressure adequate to properly fill and seal the joint.
 
Tooling Tooling should be completed in one continuous stroke immediately after sealant application and before a skin forms. Tool or strike the sealant with light pressure to spread the material against the backer material and the joint surfaces. A tool with a concave
 
profile is recom­mended to keep the sealant within the joint. Do not use liquid tooling aids such as water, soap, or solvents. Tool the sealant applied at sills so that precipitation and cleaning solutions will not pool.