CRL RTV408 Industrial and Construction Silicone Sealant - 10.3 Fluid Ounce Cartridge

CRL RTV408 is a neutral cure, medium modulus silicone sealant. CRL RTV408 cures to a tough, flexible rubber when exposed to moisture. CRL RTV408 offers primerless adhesion to a wide variety of common building materials. CRL RTV408 is a fast- cure elastomeric sealant that is desirable for many in-house production applications. CRL RTV408 is easy to gun and tool and is available in clear, white, aluminum, bronze, beige, tan and black. CRL RTV408 is non-corrosive to all common building components including insulating glass. CRL RTV408 has a long life expectancy and when cured, this elastomeric sealant remains flexible from -65°F to 400°F without cracking or becoming brittle. RTV408 in white or tan contains a fungicide that makes this sealant suitable for use in bathrooms, spas, and sanitary applications. CRL RTV408 is AAMA approved for exterior perimeter sealing compound and has a 20 year limited warranty. CRL RTV408, as with most major silicones, its life expectancy is still undetermined (aging tests up to and beyond 25 years have resulted in minimal changes to physical properties).

Applications

• metals,
• aluminum
• stainless steel
• chromium
• tin
• iron
• plastics
• rigid P.V.C.
• phenolic resin
• glass
• ceramic
• most reflective coated glasses

Limitations

CRL RTV408 is not recommended for: 

• Concrete and stone expansion joints 
• Horizontal decks, patios, driveway or terrace joints where abrasion or physical abuse is encountered 
• Sealing submerged joints, particularly where porous surfaces permit water infiltration to the bond surface 
• Interior or exterior structural sealing below the waterline in marine applications 
• Designs that will be painted after application of the sealant (paint films bridge the sealant, but do not adhere to the sealants) 
• Structural glazing. (contact CRL Technical Sales Department for recommendations of the proper sealants for this application) 
• RTV408 is not approved for food contact or potable water applications. For these applications contact the CRL Technical Sales Department 
• Totally confined spaces, because the sealant requires atmospheric moisture for cure 
• Auto trim 
• Appliance trim (i.e., adhesive trim) 
• Black RTV408 (Cat.No.RTV408BL) is recommended for glass-toglass butt joints because butt joints sealed with clear sealant may contain small amounts of air that are trapped during the packaging and/or application of the sealant, as well as bubbles that can form during the curing of the silicone due to gas that is given off or movement of the glass before final cure. Appearance standards and subsequent repairs (e.g.,limited to sight lines) should be established and agreed upon prior to sealant application,if clear is used.