제품 개요
LOCTITE 498 is a one-part, medium-viscosity cyanoacrylate instant adhesive engineered for applications requiring elevated heat tolerance and dependable performance in humid environments. It cures rapidly through moisture activation and forms strong bonds on metal, rubber, and most plastics—including difficult-to-bond substrates like PP, PE and PTFE when used with an appropriate primer. The product is optimized for assemblies exposed to thermal cycling and intermittent temperatures up to ~121 °C (250 °F).
주요 특징 및 장점
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Medium-viscosity formula that fills small gaps and flows easily on close-fitting parts.
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Excellent resistance to thermal cycling—maintains bond strength under repeated temperature changes.
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Built for humid and challenging environments—superior moisture-resistance improves reliability.
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One-component cyanoacrylate system—no mixing, simple application, minimal setup time.
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Versatile substrate compatibility—metals, rubbers, plastics, and with primer, even low-surface-energy plastics.
How to Use?
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표면 처리
Clean bonding surfaces thoroughly. Remove grease, oil, old adhesive, coatings or contaminants. Use a suitable cleaner (e.g., LOCTITE SF 7070) if needed. -
애플리케이션
Apply a small amount of LOCTITE 498 to one surface. Keep applied layer thin for best cure speed and strength.
For low-surface-energy plastics (PP, PE, PTFE) use a primer like LOCTITE SF 770 for optimum performance. -
조립
Fit parts together immediately after adhesive application. Hold or clamp until initial fixture is achieved (approx. 50 seconds on steel). -
경화
Allow full ambient cure (24 h at 22 °C) for maximum strength and durability. In humid or thicker sections, cure may take longer. -
Disassembly / Repair
If removal is needed, consult the Technical Data Sheet for recommended methods. Often mechanical separation or localized heat may be necessary.
팁 및 참고 사항:
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Avoid excess adhesive to prevent squeeze-out and unnecessary mess.
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Ensure good part confinement and proper alignment before bonding.
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For high-temperature or demanding service, verify bonded materials and conditions suited to LOCTITE 498.
자주 묻는 질문
Q1: Can LOCTITE 498 be used on plastics like PP or PTFE?
A1: Yes—when used with an appropriate primer (e.g., LOCTITE SF 770) it can bond low-surface-energy plastics such as PP or PTFE.
Q2: What is the maximum service temperature?
A2: It is rated for intermittent exposure up to about 121 °C (250 °F).
Q3: What is the typical fixture time?
A3: Approximately 50 seconds on steel under standard conditions.
Q4: Is there a primer requirement?
A4: Not for most common metals and plastics, but when bonding difficult plastics or under poor surface conditions, a primer is recommended.
Q5: Is LOCTITE 498 moisture-resistant?
A5: Yes. It exhibits superior resistance to humidity, making it suitable for humid or moisture‐exposed assemblies.
