ACDelco RTV Engine Sealant 5.3 oz Cartridge — OEM-grade RTV for Oil & Coolant Resistance, High-Viscosity Gap-Filling

ACDelco GM Original Equipment 10-2010 RTV Engine Sealant is a high-viscosity, air-curing gasket maker formulated for engine joints and covers, supplied in a 5.3 oz cartridge for professional and DIY engine sealing tasks.

This RTV (room-temperature-vulcanizing) sealant is made to the specifications of original equipment manufacturers, delivering a reliable polymer bead that fills gaps, resists oil and coolant exposure, and cures to form a flexible, long-lasting seal. It’s suitable for a wide range of engine sealing surfaces where a formed gasket isn’t available or where a liquid gasket provides better fit and protection. The cartridge format fits standard caulking guns for precise application during assembly or repairs.

Where can I use this ACDelco RTV sealant on my engine?

This product is intended for multiple engine sealing tasks where a pliable, cured bead is needed instead of a cut gasket. It bonds to metal surfaces and is effective on parts that experience vibration and temperature cycling, helping reduce leaks when applied properly.

• Oil pans and ladder frames
• Front and rear timing covers
• T-joints, manifold corners, intake ends, and cam covers
• Manifold end seals and other uneven mating surfaces

How quickly does the sealant cure and can I reassemble immediately?

The high-viscosity formula begins curing when exposed to air and develops handling strength relatively quickly, allowing many assemblies to be completed without extended wait times. In many cases, systems can be refilled with oil or coolant shortly after correct application and bolt torqueing, but full cure time depends on bead size and environmental humidity.

• Surface tack and initial skin formed by air exposure
• Short-term handling allows earlier fill of oil or coolant in many repairs
• Full cure is influenced by bead thickness and humidity—follow vehicle-specific guidance

What makes this ACDelco sealant suitable for professional or DIY use?

Built to meet OEM-level performance, the sealant balances ease of use with durability expected in repair shops and home garages. The cartridge fits standard applicators for controlled dispensing, and the formula resists breakdown from engine fluids, helping maintain a reliable seal through normal operating stresses.

• 5.3 oz cartridge for accurate, low-waste application
• High-viscosity for gap-filling without excessive run-off
• Formulated for resistance to oil and coolant exposure

Are there application tips to get the best result?

Surface preparation and correct bead placement are critical for a lasting seal. Clean mating surfaces thoroughly, remove old gasket material, and apply an even bead sized to the flange gap. Torque fasteners to the manufacturer’s sequence and specs to compress the bead properly.

• Degrease and dry surfaces before application
• Apply continuous bead; avoid gaps or overlaps that trap air
• Tighten bolts in the recommended pattern and torque values

Who is this for: This ACDelco GM Original Equipment 10-2010 RTV Engine Sealant is aimed at professional mechanics, automotive technicians, and experienced DIYers who need an OEM-grade liquid gasket for engine repairs and assembly. It suits anyone replacing covers, pans, or manifolds who requires a durable, oil- and coolant-resistant seal delivered in a convenient 5.3 oz cartridge.