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Nuco 64000 Nuflex 640 Thermoplastic, Clear, Paintable, 300ml

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CAD $14.99
/ Each
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Nuflex 640 Thermoplastic, Clear, Paintable, 300ml
Nuflex 640 Thermoplastic, Clear, Paintable, 300ml
CAD $14.99 / Each
Excellent adhesion to most substrates. Cures in 24 hours. Non-staining. Ideal for gutters, eaves troughs, flashings, and siding!

NuFlex® 640 Thermoplastic is a one part, co polymer, high performance sealant. The cured sealant exhibits good physical properties including excellent adhesion to a variety of construction materials including marine surfaces. It possesses rubber-like characteristics and can be compressed or extended. NuFlex® 640 is also non-staining and is used in the construction field for sealing and adhesive applications. NuFlex® 640 Thermoplastic is available in a non-sag consistency for application by caulking gun, in both vertical and horizontal joints.


  • Excellent adhesion to most substrates.
  • Cures in 24 hours.
  • Paintable.
  • Non-staining.
  • Available in a plastic cartridge
  • Ideal for gutters, eaves troughs, flashings, and siding!

Typical Uses

NuFlex® 640 Thermoplastic Sealant can be used for face bedding and cap bead in glazing applications and sealing mitre joints in windows. It is also ideal for use when installing gutters, eaves troughs, flashings and siding. Typical uses also include windows and door caps, fascia, F-channel, J-trim, crown molding, perimeter seals, truck trailers, bus bodies, modular home, and recreational vehicles. NuFlex® 640 Thermoplastic Sealant has exceptional adhesion to vinyl, glass, aluminum, brick (unprimed), concrete (unprimed), metal, and wood. NuFlex® 640 does not contain any silicone and can be painted with quality water and solvent based paints after 4 hours.

Surface Preparation & Application

Working Surfaces: Surfaces to be bonded should be clean, dry, and free from oil, grease, moisture, dirt, corrosion, or any other material that may deter adhesion. Apply NuFlex® 640 in the joint from bottom up, filling completely and avoiding entrapped air.


Avoid sparks, open flame or any source of heat. Avoid prolonged breathing of vapours and skin/eye contact. Provide adequate ventilation. Do not take internally. If swallowed, do not induce vomiting. Keep out of reach of children. For over exposure seek medical attention immediately. Read the Material Safety Data Sheet before using product.


These values are not intended for use in preparing specifications. Spec Writers; please contact NUCO Inc. before writing specifications if any further information is required.

Description Specification As Supplied
Consistency: Soft, Buttery, Non-sag
Flash Point: 24OC (75OF) Tag Closed Cup
Elongation Strength (Peak) QUV ASTM D 412: Excess of 300%
Tensile Strength (Peak) QUV ASTM D 412: Greater than 500 psi
Modulus 100%: 140 psi
Joint Openings: 1/8" x 1/8" to 1/2" x 1/2" (approximately)
Tack Free: < than 1 minute
Cure (1/4" x 1/4" bead): 24 hours
Service Temperature Range: -29OC to 71 OC (-20 OF to 160 OF) H23
Weight / Gallon: 10lb, +/- 1 lb
Paintable: 1 4 hours


The information and data contained herein is BASED ON INFORMATION WE BELIEVE TO BE RELIABLE. Please read all statements, recommendations or suggestions herein in conjunction with our CONDITIONS of SALE which apply to all goods supplied by us. We assume no responsibility for the use of theses statements, recommendations or suggestions, nor do we intend them as recommendation for any use which would infringe any patent or copyright.

More Information
  • Brand: Nuco
  • Color: Clear
  • Size: 300ml
Shipping Info
  • Weight (LBS): 0.98
  • Shipping Length: 2.00
  • Shipping Width: 2.00
  • Shipping Height: 11.00
Product Codes
  • CF Product Code: NUC64000
  • Part Number: 64000
  • UPC: 621360640004

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