PremiSeal 255 is a nominal 2.5 pcf density closed cell polyurethane foam roofing system intended for use by qualified contractors trained in the processing and application of spray polyurethane foam. PremiSeal 255 provides a superior R-value of 6.4 per inch and a continuous insulation without thermal breaks. The PremiSeal roofing system provides excellent self-adhering qualities with superior wind uplift, is self-flashing, seamless and with its closed cell nature provides a durable leak resistant roofing system. Its superior strength provides excellent resistance to foot traffic and abuses. The PremiSeal 255 roofing system can be used in most retrofit or new construction applications.
PremiSeal 255 is a two-component one to one by volume, spray applied polyurethane foam. The PremiSeal 255 liquid A component (Iso) and B component (Resin) are mixed through specialized proportioning spray equipment to produce a fast curing rigid foam plastic insulation. PremiSeal 255 utilizes an EPA approved, zero ozone depleting blowing agent.
PremiSeal 255 is a roofing system designed for use in commercial and industrial applications. Use in lieu of more traditional forms of roofing systems. PremiSeal 255 can be applied as a new system over most decking substrates or over an existing built up roofing system as a cost effective alternative to a complete tear off. PremiSeal 255 is suitable for application to most construction materials including wood, masonry, concrete, metal and most roofing board stock materials. PremiSeal 255 can be applied to clean, dry and sound roofing surfaces such as BUR, mod bit, metal, concrete, single-ply and other properly prepared roofing systems. This system will provide a seamless monolithic roof system with no joints, seams, cracks or mechanical fasteners that would allow moisture, heat or cold to enter. Additional uses of this product are as an exterior coating for industrial tanks, agricultural structures, air barrier system, etc.
Typical Physical Properties
|R-VALUE||6.4 / Inch||ASTM C 518|
|CORE DENSITY||2.5 LB / Cubic Foot||ASTM D 1622|
|COMPRESSIVE STRENGTH||42-50 PSI||ASTM D 1621|
|TENSILE STRENGTH||55-65 PSI||ASTM D 1623 Type C|
|CLOSED CELL CONTENT||> 90%||ASTM D 6226|
|DIMENSIONAL STABILITY||0.5%||ASTM D 2126|
|WATER ABSORPTION||0.9%||ASTM C 2842|
|WIND UPLIFT||200 lb./ft2||CSA 123.21|
|LIQUID COMPONENTS AS SUPPLIED||A (ISO)||B (RESIN)|
|SPECIFIC GRAVITY @ 74°F||1.24||1.17|
|VISCOSITY (BROOKFIELD) @ 74°F, CPS||250||900-1100|
|WEIGHT PER DRUM - LBS||551||500|
|BUILDING CODE CERTIFICATIONS / FIRE TEST DATA|
|FLAME SPREAD||ASTM E84||40|
|INTERNATIONAL BUILDING CODE (IBC)||Meets||Roofing and Foam Plastics|