CRL RTV408 White Neutral-Cure Silicone Sealant Cartridge

• Compatible for Insulating Glass Glazing
• Mildew Resistant Formula (RTV408W / RTV408T)
• Excellent Adhesion to Most Surfaces
• Low Odor, Non-Acetic Cure Formula

CRL RTV408 Industrial and Construction Silicone is a neutral-cure, medium-modulus, 100% silicone sealant that cures to a tough, flexible rubber when exposed to moisture. RTV408 provides primerless adhesion to aluminum, stainless steel, most plastics, rigid PVC (vinyl), phenolic resin, glass, ceramic, and most reflective-coated glasses—making it an ideal neutral cure silicone sealant for insulating glass and curtainwall glazing. All surfaces must be properly cleaned and the sealant tooled for good adhesion. Cat. No. S1L2100 Primer may be required for some substrates. Review crlaurence.com/sealants-technical for our Sealant Guidelines to Good Glazing.

Key differentiators: primerless adhesion to many substrates, mildew-resistant formulations (RTV408W and RTV408T), low-odor non-acetic cure, wide service temperature range, and cartridge Screw-On Nozzles for greater yield and precise bead sizing.

BASIC USES: Fast cure time and easy tooling make RTV408 suited for production sealing, glazing insulating glass units, sealing curtainwall joints, vinyl/steel/aluminum windows, skylights, and general weatherproofing. Also used in vehicles, ships, aircraft, and for electrical insulation where non-corrosive neutral-cure silicone is required. RTV408 stays flexible and resists cracking or embrittlement across approximately -65° to 400°F (-54° to 204°C) and can be applied at outdoor temperatures as low as -20°F (-29°C) (surfaces must be clean, dry and frost-free) or as high as 100°F (38°C). RTV408W and RTV408T contain a fungicide; the cured sealant is mildew resistant.

All CRL silicone sealant cartridges include Screw-On Nozzles (4" / 102 mm long, tapered)—trim to exact bead size for reduced waste. To order additional nozzles, specify Cat. No. S1LN0Z.

LIMITATIONS: Not recommended for concrete and stone expansion joints; horizontal decks, patios, driveways or terrace joints subject to abrasion or physical abuse; submerged joints where pore infiltration reaches the bond surface; structural sealing below the waterline in marine applications; structural glazing; food-contact or