Page 1 of 2
ScotchfilTM
Electrical Insulation Putty
Data Sheet
__________________________________________________________________________________
__________________________________________________________________________________________
3M UK PLC 3M Ireland 3M UK PLC
Electrical Products Sales Office Sales Office
3M Centre, Cain Road 3M House, Adelphi Centre PO Box 393
Bracknell, Berkshire RG12 1JU Dun Laoghaire, Co Dublin, Ireland Bedford MK41 0YE
Telephone: 01344 858616 Telephone: 353 1 280 3555 Telephone: 01234 229462
Fax: 01344 858758 Fax: 353 1 280 3509 Fax: 01234 229433
Product Description
Scotchfil Brand electrical insulation putty is a
puttylike electrical grade compound in tape form.
Scotchfil Putty is UL Recognised as a splice
insulation for electrical conductors at
temperatures up to 80°C (176°F) when
overwrapped with either Super 33+ or Super 88
Vinyl Electrical Tape
Tape Features
UL “Recognised” Category OCOT2, File No.
E59951.
Non-corrosive, synthetic rubber.
Excellent electrical properties.
Excellent ageing properties.
Will not dry out.
Applies cleanly without waste.
Applications
To insulate low-voltage (600 volts and less)
connections.
To build up cable splices and fill out major
irregularities and voids in low-voltage splices
(2300 volts and less) in order to obtain a
uniform base for further taping.
To round out high-voltage connections to
gear.
To smooth bus bar irregularities.
To create a resin dam in resin pressure
splices.
To create a moisture seal at ground wire exit
in high-voltage splices.
To moisture seal multi-conductor cable
connections.
Physical and Electrical Properties
Physical Properties
Colour Black
Thickness ASTM D1000 3.175mm
Elongation ASTM D1000 1000% min
Copper Corrosion None
Electrical Properties
Dielectric Strength
ASTM D1000 22kV/mm
Insulation Resistance
ASTM D1000 >1 x 106
megaohms
Specifications
Product
The insulating putty must be in tape form, the
thickness of which must be a minimum of
2.54mm. The tape must be a rubber-based tape
capable of being formed and moulded with
moderate finger tension at temperatures as low as
0°C (32°F). Neither the tape nor any of its
components shall cause the corrosion of copper.
The tape must be compatible with all synthetic
cable insulation as well as other splicing tapes.
Engineering/Architectural Specification
All 2300 volts or less feeder connections, taps
and splices on wires larger than 10mm2 with
irregular-shaped connectors shall be first built up
with electrical insulating putty to eliminate both
sharp corners and voids. Enough insulating putty
shall be used until good overall padding is
provided. Compress putty to fill all voids and
generally smooth out before applying electrical
splice protection.
All 600 volts or less splices and terminations on
wire larger than 10mm2 with irregular-shaped
connectors shall be insulated with a minimum of
6mm of electrical insulating putty. The entire
connection must be covered with the 6mm of
electrical insulating putty. The insulating putty
must then be over wrapped with a vinyl tape
applied with the same tension as it has when it
comes from the roll. This vinyl tape shall provide
a uniform covering of at least four layers, half-
lapped in two directions.
Page 2 of 2
ScotchfilTM
Electrical Insulation Putty
Data Sheet
__________________________________________________________________________________
__________________________________________________________________________________________
3M UK PLC 3M Ireland 3M UK PLC
Electrical Products Sales Office Sales Office
3M Centre, Cain Road 3M House, Adelphi Centre PO Box 393
Bracknell, Berkshire RG12 1JU Dun Laoghaire, Co Dublin, Ireland Bedford MK41 0YE
Telephone: 01344 858616 Telephone: 353 1 280 3555 Telephone: 01234 229462
Fax: 01344 858758 Fax: 353 1 280 3509 Fax: 01234 229433
Installation Techniques
Rounding Out Irregular Connections
Mould and pack Scotchfil electrical insulation
putty with moderate finger pressure to eliminate
voids and air spaces. The layers of Scotchfil will
fuse together into a homogeneous mass.
Insulating 600V Connections
For a 25mm connector, cut a 50mm piece of
Scotchfil putty and place in position.
Cut an identical piece and put at a 90-degree
angle to the first, but on the opposite side of the
connector.
Apply moderate finger pressure to form a perfect
mould.
Wrap with Scotch brand electrical tape Super 33+
or Super 88.
Creating a resin dam in resin pressure splices
Wrap a layer of moderately stretched Scotchfil
insulation putty around the cleaned cable jacket at
a distance of 75mm from the jacket cutback.
Lay the ground wire along the cable jacket and
though the Scotchfil putty. Wrap several layers
of highly elongated Scotchfil putty around cable
and ground wire. Bind Scotchfil putty tightly
with several wraps of Scotch brand Super 33+ or
Super 88 vinyl electrical tape. The putty and
vinyl tape will make a seal though which resin
cannot flow.
Shelf Life
Scotchfil electrical insulation putty has a 5 year
shelf life (from date of manufacture) when stored
under the following recommended storage
conditions. Store behind stock in a clean, dry
place at a temperature of 21°C (70°F) and 40 to
50% relative humidity. Good stock rotation is
also recommended.
Availability
Scotchfil brand electrical putty is available in a
38mm x 1.5M roll from 3M and your local 3M
authorised electrical distributor.
Important Notice
Technical information provided by 3M is based on experience and/or tests believed to
be reliable, but their accuracy is not guaranteed and the results may not be relevant to
every user’s application. For this reason 3M does not accept responsibility or
liability, direct or consequential, arising from reliance upon any information provided
and the user should determine the suitability of the products for their intended use.
Nothing in this statement will be deemed to exclude or restrict 3M’s liability for
death or personal injury arising from its negligence. All questions of liability relating
to 3M products are governed by the seller’s terms of sale subject where applicable to
the prevailing law. If any goods supplied or processed by or on behalf of 3M prove
on inspection to be defective in material or workmanship, 3M will (at its option)
replace the same or refund to the Buyer the price paid for the goods or services.
Except as set our above, all warranties and conditions, whether express or implied,
statutory or otherwise are excluded to the fullest extent permissible at law.
3M and Scotchfil are trademarks of the 3M Company.
Printed in the UK.
© 3M United Kingdom PLC, 2003.
