Weatherseal Sealants
UltraSpan™ US1100 Weatherstrip

UltraSpan™ US1100 Weatherstrip

Flexible seal, easy installation.

Keep weather out of hard-to-seal areas with UltraSpan US1100 weatherstrip.

Available in:
North AmericaLatin AmericaEurope, Middle East & AfricaIndia & PakistanSoutheast AsiaAustralia & New ZealandJapanChina

Create watertight splices, seals and transitions in new and remedial applications with UltraSpan US1100.

A pre-cured, 100% silicone weatherstrip, UltraSpan US1100 remains elastic whatever the weather, repelling dirt to keep your buildings looking beautiful. Its low-modulus formula maintains optimal flexibility while working to minimize stress at transitions and joints.

UltraSpan US1100 can deliver exceptional performance to repair and restore failed sealants in joints, skylights, flashing, parapets, window perimeters, and on EIFS. Its distinctive ridged profile is highly effective and easy to apply.

UltraSpan US1100 weatherstrip is fully compatible with most of our silicone sealant and coating products. Used together, they form a highly effective barrier system to seal out water and air.

UltraSpan US1100 weatherstrip is backed by world-class technical support and our extended limited warranty.

  • Pre-cured weatherstrip
  • +200%/-75% movement capacity
  • For moving and non-moving joints and transitions on a variety of substrates and finishes
  • Multiple colors

Exceptionally durable

Proven long-term resistance to extreme temperatures, UV radiation, rain, and snow, with negligible change in elasticity.


Provides a watertight primary or secondary bridge seal over moving and non-moving joints.

Movement capacity

  • +200%/-75% movement capacity, with excellent extension and compression cycling recovery
  • Low-modulus formula for reduced stress on moving substrate surfaces, keeping transitions and board joints flexible
  • Remains elastic in temperatures from -55°F (-48°C) to 400°F (204°C)

Quick and easy to apply

  • Compatible with most of our silicone sealants and coatings
  • Adheres to a wide range of construction materials
  • Ridged profile allows strip to seat evenly and reduces squeeze-out
Product Video

Currently available in translucent and eight standard colors, custom colors are also available.

Light Grey
Dark Grey
Precast White
Aluminum Grey
Available Sizes

Available in 100-foot (30.5 m) rolls in standard widths:

  • 1 inch (25 mm)
  • 1.5 inch (38 mm)
  • 2 inch (51 mm)
  • 3 inch (76 mm)
  • 4 inch (102 mm)
  • 5 inch (127 mm)

Custom widths and shapes available.

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