Volvo Penta Marine Sealant Black RTV Silicone 1161277

Volvo Penta Black RTV Silicone Sealant — Part No. 1161277

This is the genuine OEM Volvo Penta black RTV silicone sealant used across Volvo Penta marine engines and driveline systems wherever a liquid gasket or supplemental sealant is specified. It cures at room temperature to form a durable, flexible, oil-resistant seal that holds up to vibration, thermal cycling, and exposure to marine fluids.

If your Volvo Penta service manual specifies 1161277 or one of its superseded references, this is the correct product.

Product Details

• Part Number: 1161277
• Brand: Volvo Penta (OEM)
• Official Product Type: RTV Silicone Sealant / Liquid Gasket Compound
• Color: Black
• Cure Type: Single-component, ambient moisture cure (room temperature)
• Temperature Range: –65°C to +200°C (–85°F to +392°F)
• Container Size: Approx. 20g tube
• System: Engine assembly, driveline sealing, housing and cover joints
• Supersedes: 841755, 469571, 785746, 787156, 787198, 1543560
• Replaced By: Confirm via current Volvo Penta parts catalog

Compatible Applications

This sealant is not engine-specific — it is application-specific. Use wherever Volvo Penta specifies a liquid gasket or RTV sealant in the service manual for your engine or drive. Always confirm the correct sealant type and location in your service documentation before use.

• Thermostat housings and water outlet covers
• Timing covers and front engine covers
• Water pump housings
• Gear housings and lower unit mating surfaces
• Valve covers and rocker arm covers
• Oil pan mating surfaces (where specified)
• Thread sealing and minor gap filling on mating surfaces
• Any location where Volvo Penta specifies liquid gasket instead of a pre-cut paper gasket

Key Features

• Genuine OEM Volvo Penta formulation
• Flexible, vibration-resistant seal after cure
• Excellent adhesion to metal, rubber, glass, and most plastics
• Resistant to oil, grease, coolant, and solvents
• Wide operating temperature range: –65°C to +200°C
• Consolidates multiple older Volvo Penta sealant references into one current part number

What’s Included

• 1 x Volvo Penta black RTV silicone sealant tube (approx. 20g)

Superseded Part Numbers

Part number 1161277 replaces the following earlier Volvo Penta sealant references:

• 841755
• 469571
• 785746
• 787156
• 787198
• 1543560

Installation Notes

• Clean and dry all mating surfaces thoroughly before applying — oil, grease, or moisture will prevent proper adhesion
• Apply a thin, even bead; do not over-apply
• Assemble parts within the open time specified in the service manual
• Allow full cure before exposing to fluids or operating the engine
• Follow OEM torque specifications when fastening assembled components
• Keep excess sealant away from coolant and oil passages — squeeze-out can restrict flow if over-applied

Related Parts

• Volvo Penta Gasket Kit — 3888822
• Volvo Penta Gasket Kit — 3888917
• Volvo Penta Gasket Kit — 876266
• Volvo Penta Gasket Kit — 876267
• Volvo Penta Oil Pan Gasket — 841721-4
• Volvo Penta Gasket Kit — 3812357

Technical FAQ

Can I use any black RTV silicone instead of the OEM part?
Volvo Penta specifies this sealant for compatibility with their engine materials and fluid chemistry. Using a non-OEM RTV may work in some applications, but the OEM product is formulated to Volvo Penta’s exact requirements and is the safest choice for warranty-sensitive or high-stakes repairs.

How much sealant should I apply?
A thin, continuous bead — typically 2–3mm in diameter — is sufficient for most applications. More is not better: excess sealant can squeeze into oil or coolant passages and cause blockages. Follow the bead size specified in your service manual.

How long does it take to cure?
Surface cure typically occurs within 1 hour at room temperature. Full cure takes approximately 24 hours. Do not fill with fluids or start the engine until the sealant has fully cured unless the service manual specifies otherwise.

Does this sealant replace a gasket entirely?
Only where the service manual specifies liquid gasket in place of a pre-cut gasket. In most cases, it is used to supplement a gasket or seal a surface that does not use a traditional gasket. Never substitute sealant for a required gasket without confirming the OEM specification.

Parts Desk Insights

Best use case: This sealant is the right choice for any Volvo Penta engine or drive service that calls for a liquid gasket — particularly thermostat housings, timing covers, and water pump housings where pre-cut gaskets are not used. The 20g tube is well-suited to single-job use, and the wide supersession list means it covers a broad range of older Volvo Penta engine families.

Common customer questions: The most frequent issue is over-application — customers assume more sealant means a better seal, but excess material that squeezes into coolant or oil passages is a real service problem. A thin, even bead is all that’s needed. Customers also ask whether this can substitute for a gasket — it can only where the service manual explicitly calls for liquid gasket in that location.