Product Description
Willseal® 600 & 600S is a pre-compressed, self-expanding foam joint sealant, engineered to perform as a highly flexible, weathertight, primary or secondary seal in vertical exterior applications. (600 for primary or secondary; 600S in secondary only).
600S is specifically designed to provide the ideal foundation for a large variety of wet sealants, such as silicone, polyurethane, polysulfide, and acrylic. Unlike conventional wet sealant and backer rod methods, Willseal 600 & 600S is not susceptible to breakdowns caused by excessive or rapid joint movements, thus protecting structures against rain, wind, dust, and sound. Willseal 600 & 600S is waterproof to a wind-driven rain at 12.5psf (70mph) yet it is vapor permeable, making an optimal addition to any air barrier system, cavity wall joint, and interior partition application.
Willseal 600 Datasheet (PDF)Willseal 600 & 600S consist of 3 elements: a foundation of super-resilient microcell polyurethane foam; an impregnation of flame retardant, hydrophobic, UV-stabilized acrylic emulsion; and a pressure-sensitive adhesive with embedded scrim, to prevent stretching or pulling during installation. Willseal 600 & 600S are supplied pre-compressed on a roll or in sticks, with the PSA on one side for ease of installation. Both are self-extinguishing and have a flame spread of 0, with a smoke development rating of 5 per ASTM E 84, and are chemically compatible with all types of commercial construction. (For fully fire-rated joints, see Willseal FR per UL 2079.)
- Willseal 600: joint sizes from 1/8 in. to 1 3/4 in. in rolls
- Willseal 600: joint sizes from 2 in. to 8 in. in sticks
- Willseal 600S: joint sizes from 1/8 in. to 2 in.
- Willseal 600S: joint sizes from 2-1/4 in. to 8 in. in sticks
- Custom sizes available upon request
Willseal 600 family is ideal in any joint, including:
- Primary expansion, control, isolation, & retrofit joints – Willseal 600
- Secondary construction joints – behind wet applied sealants – Willseal 600 & 600S
- Exterior panel systems – masonry, stone, EIFS, curtainwalls
- Pre-cast concrete walls, tilt-up walls
- Window and flashing applications
- Interior vapor, dust, acoustical, and air control
