Bonding & Sealing

UNIFLEX PU SEALER

UNIFLEX POLYURETHANE BONDING & SEALING COMPOUND 310ml

UNIFLEX-PU adhesive and sealant is an elastic 1 component polyurethane, that is cured by air. UNIFLEX-PU provides a powerful adhesion to most surfaces. The treated surface can be sanded and over-painted with acrylic or 2 component paints. For synthetic resin based paints we recommend to carry out a test. The material is highly resistant to water (also seawater), low concentrations of acids and alkalis and for a limited time also to fuel and mineral oils. The colour white could become yellow when exposed to UV light.

Chemical basis: 1-C polyurethane
Color: white, black
Cure mechanism: Moisture curing
Skin fromation at 23°C and 50% r.h.: approx. 60 min.
Tack free time at 23°C and 50% r.h.: approx. 25-30 min.
Temperature resistance: -40°C / +80°C
Thermal resistance: 90°C
Short term: 1 day: 120°C
Short term: 1 hour: 140°C
Curing at 23°C and 50% r.h.: approx. 5mm/24h
Hardness Shore A (DIN 53505): approx. 55-60
Tensile strength (DIN 53504): 2.0 +/- 0,1 N/mm²
Elongation at break (DIN 53504): = 300%
Application temperature: +5°C to +35°C
The optimum temperature for substrate and sealant is between 15°C and 25°C.

Surface preparation:
The surface must be dry, clean, oil and grease free. The surface temperature should be between 10 and 25°C. Carry out a test to establish its compatibiliy and adhesion to plastics and paints. Pierce the membrane in the top of the cartridge and screw on the nozzle. Cut the plastic nozzle so as to provide the required diameter for the bead. The shelf life is very limited once opened. The UNIFLEX-PU bead can be shaped or spread after a short hardening time without tearing. Use a finger, but wear a wetted glove or use a wetted applicator when filling joints.


Overpainting:
Uniflex PU can be over-painted with most conventional paint systems. The paint must be tested for compatibility by carrying out preliminary trials and the best results are obtained if the sealant is allowed to cure fully first, especially in the case of baked enamels. Please note that nonflexible paint systems may impair the elasticity of the adhesive, impair joint movement and lead to cracking of the paint film. Uniflex PU cures by reation with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower. Generally the Uniflex PU must be in theory completely dry before it can be recoated. In practice it is sufficient when a chemical skin has be formed on the surface at the Uniflex PU before it can be recoated. Generally this means at least 1 hour waiting time before you can recoat again. Preliminary tests are absolutely essential.

Downloads

Product Name Price Quantity
Code: V148924
CS BLACK UNIFLEX URETHANE CTG
$19.49
Code: V148923
CS WHITE UNIFLEX URETHANE CTG
$19.49
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