Joint & Seam Filler

Brand: Prosoco

Joint & Seam Filler is designed to fill openings and create transitions where flexible reinforcement is required to bridge larger gaps and provide continuous support of fluid-applied flashing membranes, waterproofing or air barrier components.
  • Streamlines preparation by eliminating the need for joint reinforcing tapes
  • Silane functional polymer provides superior long term adhesion, crack filling and weathering characteristics
  • Bonds to most common building materials without priming
  • Single component saves time – no mixing
  • Bonds and cures in wet weather and on damp substrates. Tolerates rain immediately after application
  • May be fully exposed to UV and weather for up to 12 months. If longer, contact for inspection
  • Compatible with most sealants and waterproofing or air barrier components
  • Solvent free. Isocyanate free. Phthalate free
  • No shrinkage. No staining. No yellowing
  • Breathable – allows damp surfaces to dry
  • Will not support mold growth
  • Passes ASTM E84, Standard Test Method for Surface Burning Characteristics of Building Materials

Available Add-Ons:PROSOCO R-Guard Fast Flash Liquid Applied Flashing, 3M Aluminum Tube Caulking Gun 15 in (WT-250-XL)
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  • Viscous Paste, Mild Odor, Pale Red Color

Specific Gravity

  • 1.4 - 1.5


  • 11.8 Lbs

Total Solids

  • 99%

VOC Content

  • 30 g/L Maximum

Shelf Life

  • 1 Year in Tightly Sealed, Unopened Container

Hardness, Shore A

  • 40 - 50

Tensile Strength

  • 70 psi

Elongation at Break

  • > 180 % (ASTM D 412)

Water Vapor Transmission

  • 19 perms @ 20 mils ASTM E96

Corrosive Properties

  • Non-Corrosive


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