Reaffirmed 2021

1. SCOPE

1.1 This standard prescribes the requirements and methods of sampling and test for two pack polyurethane surfacer intended to be used for the protection of exterior of railway coaches, diesel and electric locomotive against atmospheric corrosion.

1.1.1 It is primarily suitable for application by spraying. It may also be applied by brush for touching-up small areas.

1.1.2 The material is intended to be used as a surface in polyurethane paint system over a primed surface and a two component unsaturated polyester based polyurethane knifing filler for the protection of exterior of railway coaches, etc. The material shall be used after the surface imperfection are well covered with a twocomponent polyurethane knifing filler. The surfacer is used with the object of getting a smooth, uniform and non-absorbent base for the finishing enamel.

2. REFERENCES

The standards listed in Annex A contain provisions which through reference in this text, constitute provisions of and necessary adjuncts to this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated in Annex A.