Parcel Orders over $300 Ship Free.
Tremco Willseal 600
Tremco Willseal 600 is a pre-compressed vapor-permeable foam seal for vertical joints, in 1/8 in to 2 in rolls and 2.25 in to 8 in sticks. It is used on masonry, precast, EIFS, and window-wall starter track.
- Weather-tight primary seal for vertical facades
- Pressure-sensitive adhesive along one face
- Greenguard Gold for sensitive interiors
Tremco Willseal 600
Tremco Willseal 600 is a pre-compressed, self-expanding polyurethane foam joint seal impregnated with a flame-retardant acrylic resin and treated with pressure-sensitive adhesive on one face. It is used as a weather-tight, vapor-permeable primary seal on vertical joints in precast, masonry, EIFS, metal panels, and window-wall starter track. Greenguard Gold listing and Class A flame and smoke ratings make it a fit for facades and sensitive interiors.
Key Features
- Pre-compressed acrylic-impregnated polyurethane foam
- Vapor-permeable, weather-tight primary seal
- Pressure-sensitive adhesive along one face
- Class A flame spread 5 / smoke 5, ASTM E84
- Greenguard Gold
Applications
- Precast, masonry, brick, and facade joints.
- EIFS and insulated metal panels.
- Window-wall starter track.
- Interior vapor, dust, and air control.
- Secondary construction joints behind a wet seal.
Technical Specifications
| Property | Value |
|---|---|
| Flame spread | 5, ASTM E84 Class A |
| Smoke development | 5, ASTM E84 Class A |
| Thermal resistance | 3.3 to 3.6 hr·°F·ft²/Btu, ASTM C518 |
| Thermal conductivity | 0.28 to 0.30 Btu·in/hr·°F·ft², ASTM C518 |
| Tensile | 21 psi min, ASTM D3574 |
| Foam elongation | 120% ± 20%, ASTM D3574 |
| Compression set | 4.2% max, ASTM D3574 |
| Driving rain | 600 Pa (12 psf) |
| Joint sizes | Rolls 1/8 in to 2 in; sticks 2.25 in to 8 in, 6.5 ft |
| Temperature stability | Short term −40 to 248°F; long term −40 to 194°F |
Product documents: Willseal 600 Technical Data Sheet
Frequently Asked Questions
What vertical joints is Tremco Willseal 600 used on?
Precast, masonry, brick, facades, EIFS, insulated metal panels, roofing panels, and window-wall starter track. Also secondary construction joints behind a wet seal, plus interior vapor, dust, acoustical, and air control.
What joint sizes does Tremco Willseal 600 cover?
Rolls for 1/8 in to 2 in joints; sticks in 6.5 ft lengths for 2.25 in to 8 in joints. Custom sizes on request.
What standing-water and below-grade limits apply to Tremco Willseal 600?
Not a primary seal where standing or ponding water will occur, and not for below-grade use. Avoid hydrocarbon solvents and corrosive chemicals.
What vapor role does Tremco Willseal 600 fill in the joint?
Pre-compressed foam self-expands to an elastic, vapor-permeable, weather-tight primary seal on vertical joints and stays permanently flexible.
What install prep does Tremco Willseal 600 need?
Pressure-sensitive adhesive on one face; minimal surface prep with no mixing, masking, or priming. Expansion time varies with humidity, temperature, and prior 24-hour storage.
What substrates stay compatible with Tremco Willseal 600?
Will not corrode iron, zinc, steel, galvanized steel, or copper, and will not chemically harm concrete, lightweight concrete, mortar, brick, natural stones, plexiglass, or wood. Greenguard Gold for sensitive interiors.
Please complete your information below to login.