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Pensil™ 300

Compatible. Durable. Protective.

Ensure resilient, long-lasting protection against the spread of fire, smoke, toxic gases and water with Pensil 300 Alkoxy fire-retardant joint sealant.

Available in


North America


Latin America


Europe, Middle East & Africa


India & Pakistan


Southeast Asia





Pensil 300 is a one-part neutral curing silicone sealant designed to seal joints and control the spread of fire, smoke, toxic gases and water during fire conditions.

With excellent primerless adhesion to a variety of building materials, including glass, glazed surfaces, treated wood, aluminium, steel, masonry and concrete, Pensil 300 ensures a strong and long-lasting bond.

The sealant’s exceptional movement accommodation makes it an ideal choice for joints that require fire resistance without losing adhesion or rupturing due to normal environmental movement. Whether sealing a residential or commercial building, Pensil 300 can provide peace of mind knowing that the structure is protected.

The fire-retardant additives used in Pensil 300 do not contain halogens or isocynates. Upgrade building safety and choose Pensil 300 for your fire-resistant silicone sealing needs.


Exceptional versatility

  • Compatible with a wide range of substrates and finishes
  • High movement capability
  • Long-term durability

Quick and easy to apply

  • No mixing required and easy gunnability
  • Primerless adhesion to most common building materials
  • 20-30 minutes tooling time
Product Video

Currently available in 4 standard colors.

Aluminum Grey
Available Sizes

Currently available in:

  • 265kg drums (584lbs)
  • 310ml catridges

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