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Materials & Assemblies

Introduction to VISCON: The Multi-Purpose Liquid-Applied Air Barrier

April 2, 2018

One of our most frequently asked questions is: “Do you have a liquid applied air barrier and WRB that works with the Pro Clima airtightness system?” Thanks to the diligence of the product development team at Pro Clima responding to our requests, the answer is now: “Yes, we have just the thing.”

Introducing VISCON (aka AEROSANA VISON, per European labeling). This high-quality, water-based acrylic dispersion air barrier comes with all the features you’ve come to expect from Pro Clima: it’s vapor-variable, waterproof, suitable for interior or exterior use, dries flexible, and integrates seamlessly with the entire family of Pro Clima adhesives, tapes and membranes.

Fit to your needs

Liquid-applied air barriers are sought after due to simplicity and flexibility of application. VISCON takes extra steps to ensure it’s flexible enough to be the only liquid-applied barrier that you need. Capable of handling a 6’-7” water column, it can be your WRB. Given it’s incredible range of permeability (from 0.33 to 25 perms depending relative humidity and thickness of application) and excellent performance in hazardous substance testing, it’s an ideal choice for interior air barrier application. VISCON can be painted on, or sprayed using an airless sprayer. This versatility makes the complicated transitions easier to cover, such as the multitude of beam penetrations found in masonry retrofit projects.

A Compliment To The Catalog of Solutions

In many instances, our tapes and membranes will always remain the best solution for continuous and cost-effective air sealing, but the arrival of VISCON covers a much-needed gap in the palette of airtightness tools. Speaking of gaps: VISCON works with Pro Clima’s solid acrylic tapes to span gaps or cracks in a substrates. By either applying tape over gaps before VISCON application, or by taping over VISCON once dry. Having a variety of complimentary materials to work with, give an airsealing team plenty of room to maneuver through the range of challenges sent their way. Once dry, VISCON bonds to the substrate, making a stable surface under air and wind pressure loads, while remaining elastic to ensure it does not risk embrittling over time.

Use VISCON on any masonry, such as brick, CMU, or cement, and finish with a layer of plaster or paint once VISCON dries. Dry time may vary depending on thickness, and can be easily identify because it changes from blue to a dark navy (nearly black) when dry. VISCON also works well in wood-framed projects, coating rough wood, sheathing, CLT or GUTEX woodfiber board.

For complete details see the VISCON application guide and spec sheet on the product page here. Get in touch and let us know how VISCON can help in your next airtight building.

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