XTraseal RTV Black 625’F Silicone Gasket Maker

X’Traseal 625 °F Black RTV Silicone Gasket Maker is a high-temperature, one-part, acetoxy-curing silicone sealant, designed to create durable, custom-formed gaskets for automotive and industrial applications.

• Temperature Resistance: Operates in extreme conditions, withstanding from –80 °F to +392 °F (–62 °C to +200 °C) Mohm ChemicalXtraseal. Some regional listings even indicate resistance up to 625 °F (329 °C)

• Pressure Tolerance: Rated for up to 5,000 psi, making it suitable for demanding mechanical environments

• Material & Cure Type:

  • One-component RTV silicone, curing via an acetoxy (acid) curing system EezeeXtraseal.

  • Forms a resilient rubber-like seal with minimal shrinkage and no sagging Eezee.

• Application Properties:

  • Excellent gun-ability in temperatures ranging from –20 °C to +50 °C Eezee.

  • Adheres well without requiring a primer to many surfaces (e.g., glass, metals, ceramics, epoxy, polyester, anodized aluminum, polished metal, wood) Eezee.

Performance & Workability

• Cure Timeline:

  • Skin formation or initial stability achieved in approximately 30 minutes, and complete cure (10 mm thickness) in up to 7 days—though actual time varies with local humidity and temperature Xtraseal.

• Work Window:

  • Tools or assemblies should be completed within 5 minutes of application; beyond that, it begins setting EezeeXtraseal.

Typical Uses

Ideal for sealing in high-heat and high-pressure environments, such as:

• Engine components: timing covers, valve covers, oil pans, intake/exhaust manifolds, water pumps Mohm ChemicalHomePro.

• Industrial situations: heat-resistant gaskets, ovens, pipelines, and areas requiring formed-in-place sealing EezeeXtraseal.

Safety & Limitations

• Curing System: The acetoxy (acid-cure) nature emits an acetic smell (like vinegar) and should not be used on acid-sensitive surfaces, as it can corrode certain metals or materials Xtraseal.

• Compatibility: Not paintable and not suitable for materials like PE, PP, PTFE, bitumen, or any surfaces directly exposed to gasoline Xtraseal.

• General precautions:

  • Clean and dry surfaces before application for best adhesion.

  • Use in a well-ventilated area; avoid contact with skin and eyes HomePro+1.

Summary Table