Chem-Set RTV118S Flowable Silicone Sealant, 0.1 Gal Cartridge

Description

calk RTV118S is a clear, flowable silicone sealant packaged for cartridge dispensing when a self-leveling bead is easier to place than a paste-grade material. It is used for small voids, thin-section sealing, and protective filling where the material needs to flow into crevices before curing. The one-part silicone chemistry cures with atmospheric moisture into a flexible rubber, making it useful for maintenance, assembly, and shop repair work where a neat, controlled dispense matters.

calk applications

Use RTV118S for sealing narrow gaps, filling small channels, coating localized areas, and flowing around components that need a flexible silicone barrier. Its low-viscosity behavior helps it settle into tight spaces that would be difficult to pack with a heavy-bodied sealant. It is a good fit for technicians who need a cartridge-applied material for bench work, fixture sealing, or light production use. For related products, browse our silicone adhesives and sealants.

calk specifications

Because this is a moisture-cure silicone, application surfaces should be clean, dry, and free of oils that can interrupt adhesion. The flowable consistency can be an advantage in tight areas, but it also means dams, masking, or controlled fixture orientation may be needed where runoff would create cleanup work. Start with a small test dispense to confirm flow rate and bead placement before committing to the finished part. Allow adequate cure time based on section depth, humidity, and shop temperature, and avoid trapping uncured material where moisture cannot reach it. Store cartridges closed until use, and keep dispensing components clean so cured residue does not affect the next bead.

For application ideas and cartridge workflow support, visit the Chemical Concepts video channel. Chemical Concepts can also help match dispense equipment and replacement nozzles to your shop process.