Overview: Willseal, the original brand of pre-compressed joint sealants, constantly raises industry standards while continuing to expand around the globe. Willseal products have been specified and successfully installed on thousands of construction projects worldwide. Willseal is committed to bringing intelligent solutions to our customers by utilizing
technology-driven designs to create superior sealant systems.
Willseal products meet DIN 18542*, the world’s most demanding standard, specifically for pre-compressed
Willseal Fire Rated products meet the standards for a UL 2079 Fire Rating.\
Willseal products are independently tested for water and air tightness. Independent lab results are available for ASTM 283, ASTM 330, ASTM 331 & ASTM 547.
Willseal products are solid sealants with a uniform core, no unbonded laminations, and no cheap filler foams.
Fire Rated Systems have a first in class integral smoke barrier to provide additional security and life safety.
Willseal horizontal seals contain a specially designed water-barrier, laminated internally and tested to 30 psi of head pressure.
Willseal as a company is firmly committed to environmental stewardship.
Willseal products contain no volatile organic content (VOC), thus satisfying the LEED™ criteria for Indoor Environmental Quality.
Through strategic alliances with our vendors, innovative manufacturing processes, and economies of scale, Willseal is able to offer our customers the best value proposition for state-of-the-art expansion joints.
Willseal’s vapor permeable sealants can withstand driving rain of 90 mph (1,000 Pa) while maintaining breathability. Willseal materials can be colored without a silicone face and are ideally suited for cavity walls, relieving angles and lintels.
Willseal, has developed larger, +/-50% movement capable joint systems designed to meet UL 2079 test standards. These
next generation systems incorporate a first ever smoke barrier that eliminates the need for intumescent coatings, which are easily damaged. Willseal FR-2V and FR-2H feature a fire-retardant impregnation and are designed to meet UL 2079 standards without any silicone coatings.
Complex designs and numerous directional changes are inherent in modern stadium construction. Willseal’s pre-compressed sealants are the optimal material to manage the difficult architecture of stadiums.
Open air parking structures experience large amounts of thermal and dynamic movement in all directions - vertical, horizontal, and shear. Willseal foam sealants easily adapt with these movements while maintaining water tightness. Willseal’s horizontal water barrier laminated in the center of the system is the first of its kind.
Life safety is paramount for architects and building officials. Fire control through compartmentalization
is a critical component in passive protection. Fire-resistant expansion joint systems are vital limiters of
flame spread through a structure. Willseal’s innovative internal smoke barrier prevents toxic gases and
fumes from permeating the joint system.
Willseal is dedicated to the environment and focused on ways to reduce, reuse, and recycle.
Willseal’s impregnation contains 0g/L volatile organic content (VOC) satisfying the LEED
criteria for Indoor Environmental Quality. Willseal materials can help contribute to MR Credit 5.1.
Buildings of all ages can experience damage due to water penetration into walls through joints and
around windows. This unwanted moisture can cause freeze thaw issues, finish material degradation,
and mold propagation. If the internal atmospheric humidity of a wall is increased by 5%, it can lower
insulating R-Values by as much as 50%. Willseal products are designed to allow condensation and
moisture to escape.
The Willseal technology has an optimum internal geometry for a noise barrier design, while allowing
for dynamic movement. Willseal products have an E-90 Sound Transmission Test Rating of STC >50 in
a STC 56 rated wall.