Nitoseal 125*
constructive solutions
Silicone joint sealant - low modulus.
Uses
Properties
For use internally or externally in structural movement joints
and for sealing joints in brickwork, blockwork or precast panel
construction, composite and lightweight panel construction,
curtain walling and window and door frame surrounds. It can
also be used for glazing and ceramic tiling applications.
Specific gravity
: Translucent
1.03
Standard colours
: Translucent, white, black, beige,
bronze, grey & aluminium
Advantages
! One component, ready to use, simple to apply
! Expansion joint
! Available in a range of colours
Movement accom.
factor (BS 6093)
Hardness shore A
(DIN 53505)
Skinning time
Cure time
! Primerless adhesion on most materials
! Cures to form a very flexible, elastic seal
! Good slump resistance
! Excellent weathering characteristics
! Suitable for use on concrete and masonry surfaces
! Good chemical resistance
Description
Nitoseal 125 is low modulus silicone rubber joint sealant
that cures by exposure to atmospheric moisture. It is applied
simply from the cartridge and can be finished neatly with
appropriate tooling. When cured it will accommodate high
thermal, shrinkage and moisture movements.
Technical support
Fosroc offers a comprehensive technical support service to
specifiers, end users and contractors. It is also able to offer
on-site technical assistance, an AutoCAD facility and
dedicated specification assistance in locations all over the
world.
Design criteria
Joints should be designed so that movement due to
shrinkage and thermal changes do not exceed the 40%
Movement Accommodation Factor, related to joint width.
Application temp.
Service temp. range
Colours
1.39
: 40%
: 15-23 (23C, 50% RH
after 4 weeks)
: 15 - 20 minutes (23C, 50% RH)
: 24 hours to 1 mm depth
(23C, 50% RH)
: 5C to 50C
: 40C to 120C
Instructions for use
Joint Preparation
Joint surfaces must be clean and dry. Remove all dust and
laitance by grit blasting, grinding or rigorous wire brushing.
Where necessary to achieve the correct joint profile,
Expancell* backing cord should be used. In joints not using
Expancell, Nitoseal Debonding Tape should be placed in the
base of the joint.
Priming
Nitoseal 125 exhibits excellent adhesion without primer to
glass, tiles, ceramics, aluminium, concrete, masonry, epoxy,
polyester and wood.
Application
Nitoseal 125 can be applied by hand or air operated caulking
gun. Ensure that the sealant is pushed firmly in to the joint to
give complete wetting of the surface. Any tooling of the sealant
surface must be carried out immediately using a joint shaping
tool soaked in detergent solution. If required the edges of the
joint can be protected with masking tape - if this is done ensure
that the tape is removed immediately after tooling.
Cleaning
Nitoseal 125*
Where possible the sealant depth should be between 1/3
and 1/2 of the joint width. The sealant depth must never
exceed joint width.
Joint Width (mm)
3 (min) - 5
6 - 10
11 - 20
21 - 25 (max)
Sealant Depth (mm)
as joint width
5
6 - 10
10 - 15
Uncured sealant can be removed by wiping with rags soaked
in Fosroc Solvent 102. Cured material can only be removed
mechanically.
Nitoseal 125*
Estimating
Precautions
Supply
Health and safety
Nitoseal 125
310 ml cartridges
(24 cartridges per carton)
Nitoseal 125 should not come in contact with eyes and skin.
The use of protective gloves is recommended. Do not
swallow.
Guide to sealant quantities
Number of cartridges required=
Joint Width(mm) x Sealant Depth(mm) x Joint Length(m)
310
A further amount should be allowed for wastage.
Should accidental skin contact occur, remove immediately
with a resin removing cream such as Kerocleanse Standard
Grade Skin Cleanser or Rozaklens Industrial Skin Cleanser,
followed by washing with soap and water. Do not use solvent.
In case of contact with eyes, rinse immediately with plenty of
clean water and seek medical advice.
Storage
Shelf life
If swallowed, seek medical attention immediately - do not
induce vomiting.
At least 9 months if stored in the original unopened cartridges
in a dry place between 25C. Do not store in direct sunlight.
Fire
Limitations
Only Nitoseal 125 Translucent contains a fungicide and is
not suitable for use in contact with drinking water or in
aquariums. Other Nitoseal 125 colours do not contain
fungicide.
Nitoseal 125 does not readily support flame. Fosroc Solvent
102 is flammable. Store away from heat and sources of
static charges. Do not smoke or use near naked flames. No
smoking. In the event of fire, extinguish with CO2 or foam. Do
not use a waterjet.
Flash points
Fosroc Solvent 102
33C
For further information, refer to the Product Material Safety
Data Sheet.
* Denotes the trademark of Fosroc International Limited
See separate data sheet
Important note
Fosroc products are guaranteed against defective materials and manufacture and are sold subject to its standard
Conditions for the Supply of Goods and Service. All Fosroc datasheets are updated on a regular basis. It is the users
responsibility to obtain the recent version. Refer to www.fosroc.com.
Al Gurg Fosroc
LLC
Post Box 657, Dubai
United Arab Emirates
www.fosroc.com
Head Office
telephone: (+9714) 2039699
fax: (+9714) 2859649
email: agf@fosroc.com
Regional offices
Abu Dhabi, Al Gurg Fosroc
Bahrain, YBA Kanoo
telephone: 673 1779
telephone: 17735454
fax: 673 1449
fax: 17732828
email: abudhabi@fosroc.com
email: bahrain@fosroc.com
Kuwait, Boodai
Oman, Al Amana
Qatar, Tadmur
telephone: 4817618
telephone: 24815080
telephone: 4500607
fax: 4832124
fax: 24817554
fax: 4500543
email: kuwait@fosroc.com
email: oman@fosroc.com
email: qatar@fosroc.com
UAE/0367/02/B
