H.B. Fuller 1925

H.B. Fuller 1925 is a high-quality, multi-purpose, sag-resistant, one-component polyurethane sealant. This material is a condensation cure material and is commonly used in automobile manufacturing, the shipping industry, container manufacturing, heating and ventilation systems, as well as a variety of maintenance and repair applications.

Product Type: 1K (1 component) Sealant

Application Area: HVAC Applications

Chemical Family: Polyurethanes (PU)

Features: Good Adhesion, Good Sagging Resistance, Good Weather Fastness, High Flexibility, Improved Ageing Resistance, Low Odor, Thixotropic, UV Resistant

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Labeling Claims

Applications & Uses

Application Area
Cure Method
General Instructions
  • If storing below 25°C, bring material to room temperature 24 hours before using
  • Prior to bonding, surfaces must be clean and free of any dust, oils, or other contaminants
  • Using preheated substrates can reduce the time prior to handling
  • Apply adhesive to one or both of the surfaces to be bonded. The surfaces can then be assembled and heat cured immediately.It is not recommended to use 1925 at temperatures below 5°C or higher than 35°C.
  • 1925 is typically dispensed through a nozzle that has an opening with the desired dimensional extrusion size. This is done by cutting the opening on a cartridge of sausage pack tip or with custom metal designed nozzles for bulk dispensing.
  • Once the packages are opened, it is recommended to use the shortest possible time to apply the materials. It is not recommended to reseal and use the material at a later date. After material is applied it can be smoothed with a spatula and soapy water.
  • 1925 material surface can be painted after it is fully cured. It is highly recommended that a pre-test be done on a small sample area to confirm paint compatibility and adhesion.


Physical Form
Black, white, grey
Technical Data
ValueUnitsTest Method / Conditions
Specific Gravity1.3--
Cured Properties
ValueUnitsTest Method / Conditions
Operating Temperature- 40 - 90°C-
Elongation at Break (at 50% RH)600.0%ASTM D638
Tear Strength (at 50% RH)12.0kN/mASTM D638
Hardness40.0-Shore A
Tensile Strengthmin. 2.0MPa-
Uncured Properties
ValueUnitsTest Method / Conditions
Handling Time (50% RH)5 - 6h-
Skin Formation Time40 - 70min-

Packaging & Availability

Regional Availability
  • North America

Storage & Handling

Shelf Life
9 Months
Storage Condition

1925 should be stored in a cool, dry place. For ease of use, the optimal storage temperature should between 8°C and 28°C.