VISCONN cannot be transported through low temperatures because it will freeze. Liquid-applied products cannot be returned. If you believe your order may need to be transported through freezing temperatures, please delay purchase and contact your local 475 representative .
Regular price $210.45
1-3 4+
VISCONN 10L - BLUE (DRIES BLACK) $210.45 $195.72
VISCONN 10L - WHITE $215.16 $200.10

Suitable for exterior use    Suitable for interior use


Liquid-applied air barrier for robust connections. For use as WRB, flashing for pitched windows sills, and other detailing. VISCONN® can be brushed, rolled, or sprayed as a liquid film and dries to form a seamless, elastic, airtight and vapor-variable membrane.


  • Time-saving airsealing of difficult junction because of airless spray/brush application
  • PHI-Certified airbarrier - for interior with vapor-variable properties
  • IFT Rosenheim certification as airtight/waterproof joint sealing for insulated window frame rough opening gaps
  • For use as WRB on exterior behind rainscreens when shielded from long term UV exposure
  • Excellent values in the hazardous substance test, has been tested according to the AgBB evaluation scheme / ISO 16000
  • Use appropriate safety protection when using airless sprayer
  • Available in two color options: one that is blue when wet and dries black to confirm drying, one that is white when both wet or dry


  • Apply to walls, ceilings and floor surfaces, such as masonry, CMU, wood sheathing, fiberboard, joists or joist bays
  • Reliably fills gaps of 1/8”. Deeper joints and thick coats result in longer cure times.
  • Highly porous/uneven materials require 2 or more coats for reliable coverage/airsealing
  • It may be necessary to apply more than one coat in the case of uneven or rough subsurfaces
  • Can be plastered/painted over, Pro Clima® adhesive tapes can be bonded onto it (and can be sprayed over all TESCON/CONTEGA Pro Clima® tapes)


  • Material: Aqueous acrylic dispersion
  • Passed ASTM E331/ IBC - 1403.2 (300PA for 2 hours) for WRB code compliance
  • Temperature Resistance: -40°F to 176°F
  • Perm Rating: 0.5 perms (6.11m ±0.6 m) at 11 mils (0.3 mm) thickness EN 1931
  • Vapor Variability ISO 12572: 0.33 to 25 perms (Sd: 0.13 – 10.00 m)
  • Recommended airless sprayers: Graco Hi-Boy 390, 395, 490, or 495 - see Reference Downloads for guide
  • UV/weather Resistance: 3 months of exposure
  • Low VOC per SCAQMD limits, 
  • LEEDV4 passed CDPH v1.2 for Private Office and School Classroom (PO and SC)
  • Living Building Challenge RED list free

Coverage of liquid-applied products is dependent upon applied thickness

VISCONN delivers in 2.5 Gallons (10 L) containers.
Coverage per container:

  • Approx. 125 ft² when applied with brush

  • Approx. 170 ft² when applied with airless sprayer