ThreeBond 1211 Silicone Liquid Gasket – Crankcase Sealer / Engine Sealant – 3.5 oz Tube

OVERVIEW

The ThreeBond 1211 Silicone Liquid Gasket serves as a premium crankcase sealer engineered to eliminate fluid leaks during engine assembly and scheduled maintenance cycles. This silicone-rubber liquid gasket provides consistent containment across modern powersports frames, automotive casings, and small-engine housings. Built specifically for aluminum and cast iron mating surfaces, it replaces rigid pre-cut gaskets while preserving factory clearance tolerances and bolt stress ratings.

ENGINEERING & PERFORMANCE

Formulated with a synthetic silicone resin, the compound cures into a pliable barrier that absorbs engine harmonics and bridges casting irregularities without relying purely on clamping force. It retains full sealing capability within an extended thermal window of -76°F to 392°F (-60°C to 200°C), preventing brittleness during cold starts and melting under sustained exhaust heat. The cured matrix actively repels mineral oil saturation, coolants, and road debris, ensuring stable compression ratios and long-term casing joint integrity.

KEY FEATURES

• Silicone-based liquid gasket optimized for direct crankcase and transmission application
• Operational stability maintained from -76°F to 392°F (-60°C to 200°C)
• Cures to a flexible, non-porous seal that dampens mechanical vibration
• Resistant to breakdown from petroleum oils, water glycol coolants, and atmospheric humidity
• Conforms evenly to complex three-point angles and non-uniform casting seams
• Engineered reliably for engine cases, differential housings, and cover flanges
• Delivered in a precision-measured 3.5 oz tube for controlled application rates

TECHNICAL SPECIFICATIONS

• Brand: ThreeBond
• Part Name: 1211 Silicone Liquid Gasket
• Component Type: Liquid Gasket / Engine Sealant
• Base Material: Silicone Rubber
• Temperature Range: -76°F to 392°F (-60°C to 200°C)
• Net Weight: 3.5 oz (100 g)
• Application Scope: Crankcases, case halves, engine covers, and transmission housings

• Universal — fits most ATV, UTV, motorcycle, and powersports engines as specified.

WHY RIDERS CHOOSE THIS

Technicians select this sealant because it consistently bridges microscopic surface gaps that solid gaskets simply cannot touch, especially on reclaimed or aftermarket aluminum cases. The silicone chemistry expands slightly during cure to lock uneven flange edges together, which keeps critical fasteners from loosening as temperature cycles repeat over thousands of miles. By rejecting oil swelling and thermal hardening, the cured joint protects main bearings from external contaminants and stops chronic seep points without requiring perfectly mated machining. This dependable performance makes it the standard rebuild additive when powering through track days, trail runs, or heavy torque loads where downtime costs matter.