RTV1473 - (Black) Oil Resistant Industrial (330g Cartridge)
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Momentive SILMATE™ RTV1473 – (Black) Oil-Resistant Formed-in-Place Gasketing Silicone
SILMATE™ RTV1473 is a one-component, black, paste-consistency silicone sealant engineered specifically for formed-in-place gasketing (FIPG) applications where excellent oil resistance is required. It cures at room temperature upon exposure to atmospheric moisture, forming a durable, flexible silicone rubber gasket that conforms to surface irregularities and maintains sealing integrity under thermal cycling and mechanical stress.
The paste consistency of RTV1473 silicone rubber allows the product to flow only with external pressure. As a result, RTV1473 silicone rubber can be applied to horizontal, vertical or overhead surfaces in thicknesses up to 6mm (1/4 in.).
RTV1473 silicone rubber utilises a moisture vapour cure system, which releases acetic acid vapours from the sealant surface as a by-product of cure. RTV1473 silicone rubber exhibits flow characteristics for rapid dispensing with standard pumping equipment used in assembly line production systems.
Two types of formed-in-place gasketing applications can be selected: a wet bead method and a cured bead method. The wet bead method involves mating parts before the RTV1473 silicone rubber cure has been completed. This method provides the best seal but makes future disassembly more difficult. In applications where easy disassembly/reassembly of parts is desired, the cured bead method should be considered. This method involves dispensing the RTV1473 on one surface and allowing the RTV1473 silicone rubber to fully cure before mechanically joining the surfaces.
Key Features
- Oil-resistant formulation – Ideal for engine, transmission, and industrial fluid-handling systems
- Thixotropic paste consistency – Stays in place on horizontal, vertical, and overhead surfaces (up to 6 mm / ¼ in. thick)
- Room-temperature moisture cure – No mixing, heat, or primers required for most substrates
- Excellent adhesion to metals, glass, ceramics, and many plastics
- Wide service temperature range: –60°C to 204°C (–75°F to 400°F) continuous; short-term up to 260°C (500°F)
- High elongation (500%) and tensile strength (450 psi) for durable, resilient seals
- Compatible with automated dispensing systems for high-volume production
Typical Applications
- Formed-in-place gaskets for oil pans, valve covers, transmission housings, and pump flanges
- Replacement for pre-cut gaskets in maintenance and repair operations
- Sealing applications requiring resistance to oils, greases, and automotive fluids
- Wet-bead or cured-bead gasketing methods (supports easy disassembly when needed)
Note: While RTV1473 offers good oil resistance, it must not be used in constant contact with gasoline, as excessive swelling will occur.
Technical Notes
- Maximum recommended cure thickness: 6 mm (¼ inch)
- Tack-free time: ~25 minutes at 25°C (77°F) and 50% RH
- Full cure (3 mm thickness): ~24 hours under standard conditions
- Releases acetic acid during cure—avoid use with copper, brass, or other acid-sensitive metals
- Shore A hardness: 30
- Elongation: 500%
Packaging Options
- Available in a cartridge
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Momentive SILMATE™ RTV1473 – (Black) Oil-Resistant Formed-in-Place Gasketing Silicone
SILMATE™ RTV1473 is a one-component, black, paste-consistency silicone sealant engineered specifically for formed-in-place gasketing (FIPG) applications where excellent oil resistance is required. It cures at room temperature upon exposure to atmospheric moisture, forming a durable, flexible silicone rubber gasket that conforms to surface irregularities and maintains sealing integrity under thermal cycling and mechanical stress.
The paste consistency of RTV1473 silicone rubber allows the product to flow only with external pressure. As a result, RTV1473 silicone rubber can be applied to horizontal, vertical or overhead surfaces in thicknesses up to 6mm (1/4 in.).
RTV1473 silicone rubber utilises a moisture vapour cure system, which releases acetic acid vapours from the sealant surface as a by-product of cure. RTV1473 silicone rubber exhibits flow characteristics for rapid dispensing with standard pumping equipment used in assembly line production systems.