B8X-263 is the solution for mission-critical, permanent fastener retention where failure is not an option. Its low viscosity enables deep capillary penetration into tight or blind-threaded joints, while its robust cured polymer resists thermal cycling, shock, and chemical exposure. Unlike standard adhesives that struggle with inert surfaces, B8X-263 cures reliably on stainless steel, anodized aluminum, zinc-nickel plating, and trivalent chromium coatings—without primers. Ideal for engine blocks, pump housings, and heavy machinery where long-term integrity under heat and vibration is essential.
Key Technical Specifications
| Parameter | Value |
|---|
| Viscosity | 500 cP |
| Color | Red |
| Thixotropic | No |
| Max Recommended Fastener Size | M25 |
| Fixture Time | ~10 minutes |
| Breakaway Torque (M10 steel) | 33 N·m (290 lb·in) |
| Prevailing Torque (M10 steel) | 33 N·m (290 lb·in) |
| Service Temperature | –55°C to +180°C (–65°F to 360°F) |
| Disassembly Method | Localized heating to ≥250°C (482°F) |
| Packaging | 20 ml / 250 ml |
Note: Equal breakaway and prevailing torque indicates full thread engagement and complete curing—typical of high-strength permanent formulations.
Performance Highlights
- True Permanent Bond: Designed for applications where disassembly is rare or only during major overhaul.
- Universal Metal Adhesion: Cures reliably on stainless steel (300/400 series), aluminum alloys, cadmium/zinc plating, and modern Cr(VI)-free coatings.
- High-Temperature Resilience: Stable continuous service at 180°C (360°F)—ideal for engine compartments, turbo housings, and industrial pumps.
- Low Viscosity for Deep Penetration: Flows easily into pre-assembled or hard-to-reach threads via wicking action.
- Seals Against Fluids & Gases: Prevents leakage in hydraulic, fuel, and coolant systems by filling micro-clearances.
Typical Applications
- Engine & Powertrain: Cylinder head studs, main bearing caps, flywheel bolts
- Pumps & Compressors: Housing bolts, shaft retainers, impeller locknuts
- Heavy Machinery: Structural frame bolts, gear carrier fasteners, hydraulic manifolds
- Electric Motors: Stator housing studs, rotor retention bolts
- Aerospace & Defense: Critical fasteners in high-vibration, high-heat zones
Application Guidelines
- Clean threads thoroughly; light oil residue is acceptable but heavy grease should be removed.
- For pre-assembled fasteners, apply B8X-263 at the joint interface and allow capillary action to draw adhesive inward.
- Full cure in 24 hours at room temperature; accelerated cure possible with mild heat (e.g., 60°C for 1 hour).
- To disassemble: heat the fastener locally to ≥250°C (482°F) using a hot air gun or induction tool, then loosen immediately while hot.
- Store upright at room temperature (<25°C); keep container tightly sealed.
Why Choose B8X-263?
When your application demands maximum strength, thermal stability, and compatibility with inert metals, B8X-263 delivers uncompromising performance. It’s the permanent threadlocking solution trusted in the most demanding industrial, automotive, and energy applications worldwide.
Available in 20 ml (R&D/trial) and 250 ml (production) bottles.
Contact us for high-temperature aging data, substrate-specific validation reports, or wicking application support.
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