150 Curtis Drive
Guelph, ON N1K 1N5
REV.: 3 DATE: 05/08
446 Acoustical & Vapour Barrier
NuFlex 446 Acoustical & Vapour Barrier sealant is specially formulated to adhere to most common
vapour barrier films as well as wood, metal, concrete and foam boards. NuFlex 446 is nonskinning
and nonhardening. A permanently flexible nonslumping sealant.
FEATURES & TYPICAL USES:
NuFlex 446 can be used as a perimeter sealant for polyethylene vapor barrier film over fiberglass
batt or other insulations providing a reduction in sound transmission. NuFlex 446 maintains a
positive airtight seal by remaining both permanently adhesive and flexible to all substrates that it is
applied on to such as wood, concrete, metal and foam boards.
NuFlex 446 can be used as a bedding sealant for threshold sealant when applied to metal or glass
surfaces. It is also an excellent sealant for metal roof rib keeping a good balance of cohesion and
adhesion to painted and aluminized steel panels. NuFlex 446 is nonstaining, nonbleeding and is
water resistant, even under immersion conditions. NuFlex 446 remains flexible, even at extremely
low temperatures 40OC (40OF).
SURFACE PREPARATION & APPLICATON:
Use between 5OC and 30OC (40OF85OF). Surfaces must be clean and dry. Cut nozzle at a 45 degree
angle to desired bead size, puncture inner seal and apply with a caulking gun. Clean up excess with
VM&P naphtha or mineral spirits. Apply at a 40O angle using constant pressure. Support tooled or
joined surfaces for 8 hours minimum.
Read all material information and Material Safety Data Sheets (MSDS) prior to using product. Use
only in well vented areas and avoid breathing vapors. Always use protective eyewear and clothing. If
eye contact occurs, flush with large amounts of water, frequently flushing under the lids. Seek
medical attention. Avoid skid contact and do not ingest. If ingestio