Keo U-Seal 205 HM-LC
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U-Seal 205 HM-LC | High modulus, low conductive, ultra-fast curing one-part polyurethane direct glazing & structural bonding adhesive

U-Seal 205 HM-LC is a high-modulus, low-conductivity, fast-curing, single-component polyurethane adhesive that is flexible and high-performing, designed specifically for direct glazing on vehicles. This product is engineered to ensure a safe drive-away time of just 30 minutes for vehicles equipped with airbags.

  • One-component polyurethane.
  • Solvent free, odourless.
  • Fast curing.
  • Suitable for cold and warm application.
  • Outstanding thixotropy, high decking, non-sagging.
  • High viscosity, high green strength.
  • High Modulus – maintains torsional rigidity and increases the vehicles NVH values.
  • Capable of withstanding high dynamic stresses.
  • Non-conductive, low volume resistivity.
  • Suitable for use with integral aerials.
  • Prevents contact corrosion in aluminum-body vehicles.
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Applications

Specifically designed for windshield bonding in the automotive glass replacement market, as well as side and rear windows for cars, trucks, tractors, and special vehicles. This product is ideal for direct glazing in vehicles requiring high shear 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. The product is suitable for all situations requiring strong elastic structural bonding between different materials (automotive coatings, metal sheets, fiberglass, and reinforced plastics), capable of withstanding significant mechanical or thermal stresses.

DRIVE AWAY TIME (DAT)

TÜV Crash Tested:

  • Drive Away Time: 30 minutes.
  • On vehicles fitted with both driver and passenger airbags.

U-Seal 205 HM-LC is compliant to Federal Motor Vehicle Safety Standard 208/212 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. 3.0

Hardness Shore A

(DIN 53505)

ca. 60

Density [g/cm3]
(NPT method 06) (23°C and 50% RH)

ca. 1.32

Skin time [min]
(NPT Method 17) (23°C and 50% RH)

ca. 15

Tensile strength [N/mm2] (ISO 37 DIN 53504)

ca. 8.6

G modulus at 10% [MPa]

ca. 2.3

Elongation at break [%] (ISO 37 DIN 53504)

ca. 350

Electrical volume resistivity [Ω·cm] (DIN IEC 93)

1010

Application temperature [°C]

From +5 to +40

Temperature Resistance [°C]

From -40 to +100, with brief points up to +140

Datasheet

U-seal 205 HM LC datasheet 

Instructions for Use

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 a solvent. While the adhesive is uncured, it can be wiped off with paper or cloth. Once cured, it can only be removed mechanically. Avoid direct contact with the skin by wearing latex, rubber, or polyethylene gloves. If adhesive comes into contact with the skin, wash immediately with soap and water.

Storage Instructions

U-Seal 205 HM-LC can be stored for up to 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 moisture, direct sunlight, and heat sources.

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