In stock


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 $278.10
1-3 4+
VISCONN 10L - BLUE (DRIES BLACK) $278.10 $258.63
VISCONN 10L - WHITE $282.15 $258.63

Suitable for exterior use Suitable for interior use

Keep above freezing VISCONN must be kept above freezing at all times. This includes time spent sitting on the job site. Delivery trucks often leave packages outside without signature. Know when your package is due to arrive and avoid leaving it out in freezing conditions. Check immediately upon delivery to ensure what has been delivered is not frozen.


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 on as a liquid film and dries to form a seamless, elastic, airtight and vapour-variable membrane.


  • Time-saving airsealing of difficult junction because of airless spray/brush application
  • PHI-Certified airbarrier - for interior with vapour-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
  • 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 up to 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
  • Vapour 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
  • NBC 2020- Air Barrier Systems Passed air leakage <0.02 L/(s*m2 @75 Pa (ASTM E2357)
  • 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

10L (2.5 Gallons)/ container

Coverage per container:
~11.5 m2 (125ft2) when applied with brush
~16 m2 (170ft2) when applied with airless sprayer
[coverage dependent upon applied thickness]