Iso-Bloco One Expanding Foam Tape

Credit: Schul International Co.

What makes this product green?

  • Reduces heating and cooling loads


Iso-Bloco One, manufactured by Iso-Chemie and distributed in the United States by Schul International, is a polyurethane expanding foam tape designed to seal around windows, doors, and other building joints. It is designed for Passive HouseA residential building construction standard requiring very low levels of air leakage, very high levels of insulation, and windows with a very low U-factor. Developed in the early 1990s by Bo Adamson and Wolfgang Feist, the standard is now promoted by the Passivhaus Institut in Darmstadt, Germany. To meet the standard, a home must have an infiltration rate no greater than 0.60 AC/H @ 50 pascals, a maximum annual heating energy use of 15 kWh per square meter (4,755 Btu per square foot), a maximum annual cooling energy use of 15 kWh per square meter (1.39 kWh per square foot), and maximum source energy use for all purposes of 120 kWh per square meter (11.1 kWh per square foot). The standard recommends, but does not require, a maximum design heating load of 10 W per square meter and windows with a maximum U-factor of 0.14. The Passivhaus standard was developed for buildings in central and northern Europe; efforts are underway to clarify the best techniques to achieve the standard for buildings in hot climates. applications and tested to be rainproof and airtight while maintaining vapor-permeability, as well as providing acoustic and thermal insulation. This sealer's U-factorMeasure of the heat conducted through a given product or material—the number of British thermal units (Btus) of heat that move through a square foot of the material in one hour for every 1 degree Fahrenheit difference in temperature across the material (Btu/ft2°F hr). U-factor is the inverse of R-value. ranges from 0.10 to 0.14 (0.6 to 0.8 W/m2K), is certified by EMICODE to meet the EC1 standard for low emissions, including VOCsVolatile organic compound. An organic compound that evaporates readily into the atmosphere; as defined by the U.S. Environmental Protection Agency, VOCs are organic compounds that volatize and then become involved in photochemical smog production. and formaldehydeChemical found in many building products; most binders used for manufactured wood products are formaldehyde compounds. Reclassified by the United Nations International Agency for Research on Cancer (IARC) in 2004 as a “known human carcinogen.", and has low flammability (class B1). Iso-Bloco One is shipped pre-compressed with adhesive pre-applied on one side, and comes in four widths ranging from 54 to 82 mm (2.1 to 3.2 inches). It is capable of covering gaps as narrow as 2 mm and as wide as 30 mm.


Manufacturer Information

Schul International Co.
One Industrial Park Dr.
Pelham, NH 03076
Phone: 603-889-6872
Fax: 603-889-6874

Listed in: Foam Joint Sealants