u-seal 209
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U-Seal 209 Primerless | High viscosity & decking, primerless adhesion, one-part polyurethane direct glazing & structural bonding adhesive

U-Seal 209 Primerless is a high-performance, flexible, one-component polyurethane adhesive designed for direct automotive glass replacement and composite assembly. The product is resistant to UV rays, weathering, and aging. Thanks to its exceptional adhesion properties, the adhesive can be applied without the need for a primer on glass, ceramic enamel, and painted metal surfaces.

  • One-component polyurethane.
  • Solvent-free, odorless.
  • No primer required for glass, ceramic enamel, and painted metal surfaces.
  • Suitable for application in both cold and warm temperatures.
  • Excellent thixotropy, high coverage, and non-sagging.
  • High modulus – maintains torsional stiffness and enhances the vehicle’s NVH (noise, vibration, harshness) performance.
  • Withstands high dynamic pressure.
  • UV-resistant, weather-resistant, excellent aging and color stability.
  • Suitable for use with integrated antennas.
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Applications

Specifically designed for bonding windshields in the automotive glass replacement market, including side and rear windows of cars, trucks, trailers, and specialty vehicles. This product is ideal for direct glazing in vehicles requiring high modulus and non-conductive properties. Additionally, it is used for bonding fiberglass-reinforced plastic components (such as roofs, side panels, and front panels) on vehicles. This adhesive is suitable for all applications requiring strong elastic-structural bonding between different materials (automotive coatings, metal sheets, fiberglass, and reinforced plastics) and can withstand mechanical stress or high temperatures.

DRIVE AWAY TIME (DAT) information

Thông tin về thời gian sẵn sàng lái xe (DAT)

  • Drive Away Time: 1 hour.
  • On vehicles fitted with both driver and passenger airbags.

U-Seal 209 Primerless is compliant to Federal Motor Vehicle Safety Standard 212 and all long-term durability requirements according to the full range of N.P.T laboratory Data.

Technical Data

Appearance Non-sag thixotropic paste
Color Black
Chemical nature Polyurethane
Curing Mechanism Moisture-curing
Curing through volume [mm] (NPT Method 07) (24h – 23°C and 50% RH) ca. 3.2
Hardness Shore A (DIN 53505) ca. 62
Density [g/cm³ (NPT method 06) (23°C and 50% RH) ca. 1.23
Skin time [min] (NPT Method 17) (23°C and 50% RH) ca. 30
Tensile strength [N/mm² (ISO 37 DIN 53504) ca. 10
Elongation at break [%] (ISO 37 DIN 53504) ca. 480
Application temperature [°C] From +5 to +40
Temperature Resistance [°C] From -40 to +100, with brief points up to +140

Datasheet

U-Seal-209-Primerless_TDS2021_eng_ver-5.0.pdf

Hướng dẫn sử dụng

Fit the bag into a manual or pneumatic air operated gun (provided with telescopic piston). The surfaces to be treated should be perfectly clean, dry and free from dust and grease. It is necessary to treat the windscreen and its bonding surface according to NPT application guidelines, using a specific CLEANER or ACTIVATOR from NPT range and black primer U-PRIMER 130. It is advisable to carry out preliminary adhesion tests on the support. Specific guidance regarding the use of primers may be obtained by submitting substrate samples to our laboratories.

Do not cure in the presence of curing silicone sealants. Avoid contact with alcohol and other solvent cleaners during cure. When applying sealant, avoid air-entrapment. Since system is moisture-cured, permit sufficient exposure to air. Bonded elements may require additional holding or support during curing period. Tooling and finishing must be carried out within the tack-free time of the sealant.

 

Cleaning Instructions

Clean used tools with acetone or solvent. If the adhesive has not yet cured, it can be wiped off with paper or a cloth. Once cured, the adhesive can only be removed by mechanical means. Avoid direct skin contact by wearing latex, rubber, or polyethylene gloves. If the adhesive comes into contact with the skin, it should be removed immediately and the area washed thoroughly with soap and water.

Storage Instructions

U-Seal 209 Primerless can be stored for 12 months in its original (unopened) packaging at temperatures between 10°C and 25°C, in a dry and well-ventilated area. Storage temperatures should not exceed 25°C for extended periods. Keep away from damp areas, direct sunlight, and heat sources.

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