Flexseal PU440

Flexseal PU440 is a one component non sag polyurethane
sealant that cures by reacting with air humidity to form a
tough, high modulus and highly elastic sealant. Flexseal
PU440 has a very wide service temperature range.
Suitable for vertical and horizontal joints.

Applications

  • Basement walls.
  • Precast concrete elements.
  • General sealing of construction and expansion joints.
  • For concrete, wood, marble, stone, aluminum, steel, ceramic, gypsum boards, etc.
Products Catalogue

Advantages

  • Paintable, consult DCP’s Technical Department for more details.
  • Good resistance to microorganisms and a variety of chemicals.
  • Good adhesion to most surfaces without need for priming.
  • Remains elastic at temperatures down to -30°C.
  • High shore hardness characteristics.
  • Very easy and economical to use.
  • Excellent aging resistance.
  • One component.

Technical Properties

Technical Properties

Colour:

Various

Density:
1.40 ± 0.05 g/cm3

Shore A hrdness:
ASTM C661

40 ± 5

Service temperature:
-30 up to 80°C

Application
temperature:
5 up to 50°C

Adhesion in peel:
ASTM C794

≥ 70 N

Tack free time:
ASTM C679

Up to 2.30 hr @ 23°C & 50% RH

Curing rate:

≈ 2.5 - 3.5 mm/day

Elongation at break:
ASTM D412

≥ 700% @ 7 days

Tensile strength at break:
ASTM D412

≥ 1.9 MPa@ 7 days

Modulus @ 60%:
ISO 8339

≥ 0.3 MPa @ 23°C
> 0.6 MPa @ -20°C

Effects of accelerated test:
ASTM C793

No cracking

Effects of heat aging:
ASTM C1246
Pass @ 70°C

Movement accommodation:
ASTM C719

±25%

VOC:
ASTM D2369

≤ 75 g/ltr
(comply with LEED)