XN90/N4 - Sherwin

NETWORK RAIL
New Steelwork
Specification
XN90/N4
PROTECTIVE SYSTEM XN90/N4-095:
Epoxy MIO Protective System
FOR THIS ENVIRONMENT:
Epoxy MIO Paint System:
Life to First Major Maintenance:
C2, C3, C4, C5-I, C5-M
(BS EN ISO 12944-2)
Up to 25 years
SPECIFICATION:
Surface Preparation:
Coat
Primer
Intermediate
Intermediate
Finish
Blast-clean to Sa2½ (BS EN ISO 8501-1). Surface
profile within the range of 70-100m.
Material
mdft
Applied
(m)
Metagard K232 Zinc Rich
50
Shop
Primer
Epigrip C267V2 Epoxy MIO
125
Shop
Epigrip C267V2 Epoxy MIO
125
Shop
Leighs C750V2 Special
50
Shop
Finish
PADS Reference: 028/980576
Notes on this Specification:
Grit abrasives to be used unless otherwise specified.
All film thicknesses shown are minimums.
A stripe coat of Epigrip C267V2 at 75m mdft is applied by brush between coats 2 and 3.
Please see the Leighs C750V2 Technical Data Sheet for recommendations for overcoating of epoxies.
It may be necessary to apply more than one coat of finish for certain colour shades (e.g. some pastel shades and bright
strong colours).
All materials should be obtained from Sherwin-Williams and must be applied in accordance with the relevant Technical Data
Sheet.
Sherwin-Williams, Tower Works, Kestor Street, Bolton, BL2 2AL, England UK
Tel: +44 (0) 1204 521771 Fax: +44 (0) 1204 382115
email: [email protected] website: www.sherwin-williams.com/protectiveEMEA
SW1 02/2014
Repair Procedure for Damage Resulting From Transport, Erection, etc
The following procedure applies to remedial work of areas of the protective system that have been
damaged during transit or erection and includes that caused by any site welding operations. The
damaged area shall receive remedial preparation and painting equivalent to the specified protective
system.
Damaged paintwork should be prepared back to a feathered edge of sound paint. This area, together
with a further 50mm into the adjacent areas of sound paintwork, should be appropriately prepared and
cleaned down. All paint coats should be applied such that the edges of the sound protective system
are enveloped.
NATURE OF DAMAGE
REMEDIAL TREATMENT
Damage to top coat only
Lightly abrade and clean down all areas to receive paint. Carefully touch in with
one coat of Leighs C750V2 Special Finish to give a minimum dry film thickness of
50m.
Prepare as above and carefully touch in with one or two coats of Epigrip C267V2
Epoxy MIO to give a minimum dry film thickness of 125m/coat (depending on
depth of damage). Apply one coat of Leighs C750V2 Special Finish to give a
minimum dry film thickness of 50m.
Spot abrasive blast-clean the exposed steel area in accordance with BS EN ISO
8501-1 to achieve a surface standard of Sa2½. Spot prime the exposed steel with
one coat of Metagard K232 Zinc Rich Primer and carefully touch in with two coats
of Epigrip C267V2 Epoxy MIO and Leighs C750V2 Special Finish to give minimum
dry film thicknesses of 125µm, 125µm and 50m respectively.
Damage to top coat and
intermediate coat(s)
Damage to top coat,
intermediate coat(s) and
primer
Product Information:
The following products are components of Network Rail Protective System N4 and are relevant to
Sherwin-Williams Registration Certificate Reference XN90/N2-095. These should be used in
accordance with the appropriate Product Data Sheets and Network Rail Guidance Note
NR/GN/CIV/002: The Use of Protective Coatings and Sealants.
Item
No.
Product Description
Volume
Solids
(%)
WFT
(µm)
DFT
(µm)
Theoretical
Coverage
2
(m /ltr)
Minimum
Overcoating
o
Time (20 C)
7.1.3
Metagard K232 Zinc Rich
Primer
Epigrip C267V2 Epoxy MIO
Epigrip C267V2 Epoxy MIO
Leighs C750V2 Special
Finish
45
111
50
9.0
2½ hrs
75
75
53
167
167
94
125
125
50
6.0
6.0
10.6
5 hrs
5 hrs
4½ hrs
7.2.2
7.2.2
-
N.B. The above table is for guidance only. Refer to the appropriate product data sheet for more detail.
Sherwin-Williams, Tower Works, Kestor Street, Bolton, BL2 2AL, England UK
Tel: +44 (0) 1204 521771 Fax: +44 (0) 1204 382115
email: [email protected] website: www.sherwin-williams.com/protectiveEMEA
SW1 02/2014

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