Belzona 2141 User manual

Belzona 2141
FN10051 (ACR-FLUID ELASTOMER)
INSTRUCTIONS FOR USE
www.belzona.com Publication No. 43-03-20
1. TO ENSURE AN EFFECTIVE MOLECULAR
WELD
1.1 METALLIC SURFACES
a) Remove all loose surface contamination and degrease with
Belzona®9111 (Cleaner/Degreaser) or any other effective cleaner
which does not leave a residue e.g. methyl ethyl ketone (MEK).
b) Select an abrasive to give the necessary standard of cleanliness
and a minimum depth of profile of 3 mils (75 microns). Use only an
angular abrasive.
c) Blast clean the metal surface to achieve the following standard of
cleanliness:
ISO 8501-1 Sa 2½ very thorough blast cleaning
American Standard near white finish SSPC SP 10
Swedish Standard Sa 2½ SIS 05 5900
d) After blasting, metal surfaces should be coated before any
oxidation of the surface takes place.
SALT CONTAMINATED SURFACES
Metal surfaces that have been immersed for any periods in salt
solutions e.g. sea water, should be blasted to the required
standard, left 24 hours to allow any ingrained salts to sweat to the
surface and then washed prior to a further brush blast to remove
these. This process may need to be repeated to ensure complete
removal of salts. The soluble salt contamination of the prepared
substrate, immediately prior to application, should be less than
20mgs/m².
1.2 FLEXIBLE SURFACES (e.g. rubbers)
NOTE: Belzona®9111 can draw processing oils and waxes to the
surface of some rubbers, particularly when new, which then impairs
adhesion of Belzona®2141.
Test for this on a small area. If, on rubbing with a rag moistened
with Belzona®9111, a greasy film appears, the surface should not
be degreased, but simply abraded.
Undercut fine edges with a sharp knife and scuff the surface with a
rotary wire brush or suitable roughing tool.
1.3 EXISTING BELZONA SURFACES.
a) When using Belzona®2141 to overcoat a surface which has been
treated with Belzona®1111 or Belzona®1311, the Belzona product
must first be allowed to fully cure and the surface abraded, followed
by conditioning as below.
b) Application of Belzona®2141 over Belzona®1221 can be carried
out up to 4 hours after the application of Belzona®1221 without the
need of any surface treatment other than removal of contamination.
When overcoating Belzona®1221 after this time, the surface
should be abraded, followed by conditioning as below.
c) When applying the Belzona®2141 system over a Belzona coating
such as Belzona®1341 (not NSF Grade) or Belzona®5811 the
coating may be overcoated by Belzona®2941 once hard and
within its overcoat time without further surface preparation. Once
beyond the coatings overcoat time it must be flash blasted to
produce a minimum 25 micron profile before conditioning.
CONDITIONING
All surfaces must be Conditioned before applying Belzona®2141.
Metal surfaces, Belzona®1000 series and Belzona®5811 apply
Belzona®2941
Rubber and other non-metallic surfaces apply Belzona®2911 or
Belzona®2921.
Apply a thin, even coat of Belzona®Conditioner onto the surface.
A brush should be used as a stipple.
Practical coverage rate
Belzona®2941 19.8 sq.ft. (1.83 sq.m) per unit, on metallic
substrates.
Belzona®2911 and Belzona®2921, 13 sq.ft. (1.25 m²) per unit, on
smooth substrates. On well roughened rubber substrates this could
be reduced by as much as 50%.
The Belzona®Conditioner must be completely touch dry before
overcoating with Belzona®2141. This will depend on the prevailing
temperature, relative humidity, ventilation and substrate. At 68°F
(20°C) and 50% relative humidity, the touch dry state will be
achieved after the times given when applied to a steel surface.
Conditioner
Touch Dry
Max. Overcoating
Belzona®2911
45 mins
24 hours
Belzona®2921
75 mins
Belzona®2941
8 hours
NOTE:
i) Relative humidity should be between 30 & 90% and surface
temperature at least 5°F (3°C) above dew point during the
application and drying of the Conditioner.
ii) At lower temperatures and humidity a longer drying time is
required.
iii) These times may be extended when applied to rubber
substrates.
iv) If in doubt leave Conditioner longer to dry but under no
circumstances should maximum overcoat time be exceeded.
SHELF LIFE
Belzona®2941 & Belzona®2921 have a 24 month shelf life and
Belzona®2911 has an 18 month shelf life from date of manufacture
when stored at 41 - 77°F (5 - 25°C) and must be used before the stated
“use-by” date.
WHERE BELZONA®2141 SHOULD NOT ADHERE
Brush on Belzona®9411 (Release Agent) and allow to dry for 15 - 20
minutes before proceeding to step 2.
2. COMBINING THE REACTIVE
COMPONENTS
Both Base and Solidifier components must remain sealed until the
application stage.
a) Transfer the entire contents of the Base into the Solidifier container.

HEALTH & SAFETY INFORMATION
Please read and make sure you understand the relevant Safety Data Sheets.
Belzona 2141 - Instructions for Use - (2) Publication No. 43-03-20
The technical data contained herein is based on the results of long term tests carried out in our laboratories and to the best of our knowledge is
true and accurate on the date of publication. It is however subject to change without prior notice and the user should contact Belzona to verify the
technical data is correct before specifying or ordering. No guarantee of accuracy is given or implied. We assume no responsibility for rates of
coverage, performance or injury resulting from use. Liability, if any, is limited to the replacement of products. No other warranty or guarantee of
any kind is made by Belzona, express or implied, whether statutory, by operation of law or otherwise, including merchantability or fitness for a
particular purpose.
Nothing in the foregoing statement shall exclude or limit any liability of Belzona to the extent such liability cannot by law be excluded or limited.
Copyright © 2020 Belzona International Limited. Belzona® is a registered trademark.
Belzona products are
manufactured under an
ISO 9001 Registered
Quality Management System
b) Immediately mix together for at least 3 minutes and use all material
within the times shown in the table below:-
Temperature
59°F (15°C)
77°F (25°C)
86°F (30°C)
Use all
material within
25 min
13 min
10 min
VOLUME CAPACITY OF MIXED BELZONA®2141
682 cm³ (41.6 cu.in.) per 750g unit.
3. APPLYING BELZONA®2141
FOR BEST RESULTS
Do not apply when:-
i) The temperature is below 41°F (5°C) or the relative humidity is
above 90%.
ii) Rain, snow, fog or mist is present.
iii) There is moisture on the surface or is likely to be deposited by
subsequent condensation.
iv) The working environment is likely to be contaminated by
oil/grease from adjacent equipment or smoke from kerosene
heaters or tobacco smoking.
Where application conditions permit, Belzona®2141 can be applied as a
single coat but where it is not possible to achieve a uniform coating, the
material should be applied as a two coat system.
Apply the Belzona®2141 to the conditioned surface with a stiff bristled
brush or the plastic applicator provided to achieve the required
thickness.
Apply a second coat of Belzona®2141 as above following the
overcoating instructions in Section 6.
Recommended
number of coats
2
1
Target thickness
1st coat
20 mils (500
microns)
40 mils (1mm)
Target thickness 2nd
coat
20 mils (500
microns)
N/A
Minimum total DFT
32 mils (800
microns)
32 mils (800 microns)
Maximum DFT per coat
Only limited by sag resistance
Theoretical coverage
rate 1st coat
14.6sq.ft. (1.36m²)/
750g unit
7.3sq.ft. (0.68m²)/
750g unit
Theoretical coverage
rate 2nd coat
14.6sq.ft. (1.36m²)/
750g unit
N/A
Theoretical coverage
rate to achieve
minimum recommended
system thickness
9.1sq.ft. (0.85m²)/
750g unit
9.1sq.ft. (0.85m²)/
750g unit
CLEANING
Mixing tools should be cleaned immediately after use with Belzona®
9111 or any other effective solvent e.g. MEK. Brushes, injection guns
and other application tools should be cleaned using a suitable solvent
such as Belzona®9121, MEK, acetone or cellulose thinners.
4. COMPLETION OF THE MOLECULAR
REACTION
Allow Belzona®2141 to solidify as below before subjecting it to the
conditions indicated:
Movement or
use involving
no loading or
immersion
Full
mechanical or
thermal
loading
Immersion
41°F/ 5°C
12 hours
5 days
10 days
50°F/10°C
8 hours
4 days
7 days
59°F/15°C
6 hours
3 days
6 days
68°F/20°C
4 hours
2 days
5 days
77°F/25°C
3 hours
2 days
4 days
86°F/30°C
2 hours
2 days
3 days
5. STORAGE
Store in a dry environment between 41°F (5°C) and 77°F (25°C).
Inadvertent storage of Belzona®2100 Base below 41°F (5°C) or
Belzona®2141 Solidifier below 15°C may result in partial solidification. If
this occurs, the material can be restored to its normal form by resealing
the container and warming to between 104°F (40°C) and 122°F (50°C)
for 3 hours in a well-ventilated, dry area.
6. OVERCOATING
Application of subsequent layers of Belzona®2141 can be carried out
typically between a minimum of 2 hours and maximum of 3 days after
the previous application without need of any surface treatment other
than removal of contamination. Belzona®2100 series products should
never be applied “Wet on Wet”.
Overcoating of aged Belzona®2141 is possible at any time after initial
application, provided that the surface preparation techniques for flexible
surfaces described in Section 1 are employed.