LOCTITE UR 3371

Harmonization Code : 3404.90.00.00 | Artificial waxes and prepared waxes : Other

LOCTITE UR3371

Main features

  • 40-Minute Skin-Over Time
  • -30 to 80 deg C Service Range
  • More Than 300% Cured Elongation

Product Description

LOCTITE UR 3371 is a one-part polyurethane adhesive/sealant supplied as a paste and cured by atmospheric moisture. It is available in gray, black, and white and is applied from 5 to 38 deg C. Typical curing data at 23 deg C and 50% RH include a 40-minute skin-over time, 50 to 70 minute tack-free time, and 3 mm cure rate after 24 hours. After 7 days under the same conditions, typical cured properties include Shore A hardness 50 and elongation greater than 300%.

Key features

  • Surface Skin Formation: Typical skin-over time is 40 minutes at 23 deg C and 50% RH.
  • Temperature Capability: In-service temperature range is -30 to 80 deg C.
  • Cured Flexibility: Typical elongation at break is greater than 300% after seven days at 23 deg C and 50% RH.

Applications

Sealing and bonding side panels; elastic interior and exterior seams and joints in specialty vehicles and caravans.

Product Family

LOCTITE UR 3371

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.08
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
300 %

Additional Information

Technical properties

As-supplied properties

PropertyValueUnitMethod / condition
AppearanceGray, black, whiteAs supplied
FormPasteAs supplied
Specific gravity1.0823 deg C
Extrusion rate300g/min60 seconds at 23 deg C; 0.6 MPa pressure
Technical properties

Final-state properties

Typical cured properties after 7 days at 23 deg C and 50% RH.

PropertyValueUnitMethod / condition
Shore hardness50Shore AASTM D 412; cured 7 days at 23 deg C, 50% RH
Elongation at breakGreater than 300%ASTM D 412; cured 7 days at 23 deg C, 50% RH
Tensile strengthGreater than 2.5N/mm2ASTM 412C; cured 7 days at 23 deg C, 50% RH

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