DENSO – The Inventor of Passive Corrosion Prevention for Pipelines
Product Information
Special Advantages
• Excellent cathodic disbonding
resistance.
• Compatible with mill coatings from
PE, PP, FBE, PU, CTE and Bitumen.
• Improved adhesion.
• For hand and machine application.
• For steel and non-ferrous metal
surfaces.
• Fast curing and easy handling.
DENSOLEN®-Primer HT, HT25, MT25
Solvent based primers for DENSOLEN -Tapes and Tape systems.
DENSO stands for more than 90 years of tradition and innovation for the global pipeline industry. Following the founding of the
company in 1922, DENSO´s success story commenced with the world’s first passive corrosion prevention for pipelines: the
Petrolatum-Tape (“DENSO-Tape”), which was patented in 1929. DENSO high performance products are developed and
manufactured in Germany to the highest quality standards. DENSO – Leading Developer of Corrosion Prevention Technology.
Product Description

DENSOLEN -Primers are solutions
of butyl rubber and unsaponifiable
resins in petroleum spirit.
DENSOLEN -Primers enclose dust
and moisture traces and neutralise
same.
DENSOLEN -Primers are compatible
with mill coatings from PE, PP, FBE,
PU, CTE and Bitumen.
DENSOLEN -Primers improve the
peel strength of DENSOLEN -Tapes
on the metal surface and support
the corrosion protection performance.
DENSOLEN -Primers are suitable for
steel and for non-ferrous metal
surfaces.
For hand application by brush or
roller use DENSOLEN -Primer HT,
HT25 and MT25.
For machine application use
®
DENSOLEN -Primer HT25 and MT25.
Member of:
Typical Product Properties
Property
Unit
Solvent
Flash point
Density
23°C (73°F)
Solid contents
Contents of aromatic compounds
Viscosity (nozzle 4 mm) 23°C (73°F)
Drying time for hand application 1)
DENSOLEN®-Tape to be wrapped
within
Consumption app. by hand
Consumption app. by machine
Operating temperature
1)
2)
°C (°F)
g / cm 3
% by weight
% by weight
sec.
min app.
Typical Values, DENSOLEN-Primer
HT
HT25
MT25
petroleum spirit petroleum spirit
petroleum spirit
-18 (-0,4)
-18 (-0,4)
≥ 23 (≥ 73)
0,79
0,78
0,80
29
24
23
< 0,0005
< 0,0005
< 0,01
40±5
25±5
25±5
5-10
5-10
25
h
2
l/m
l / m2
2)
°C (°F)
Test
Standard
DIN EN 57
DIN 51757
ISO 1515
GC
DIN 53211
-
<8
<8
<8
-
0,2
-60 to +100
(-76 to 212)
0,2
0,1
-60 to +100
(-76 to 212)
0,2
0,1
-60 to +100
(-76 to 212)
-
Depending on temperature, humidity, air movement and pipe surface temperature.
Depending on DENSOLEN®- Tape system used.
Method of Application
Application of DENSOLEN Primers on welded joints
Vigorously stir DENSOLEN -Primer
in the original container prior to
application. Apply a uniform coat of
DENSOLEN -Primer to the pipe
surface (metal and 100 mm of
adjacent mill coating) by brush or
roller. Seal the original container
carefully after use. Clean brush and
roller thoroughly with petroleum
spirit. The primer has to be dry prior
to application of DENSOLEN -Tapes.
Depending on type of primer, ambient
temperature, air movement and
humidity, drying will take app. 5 to 25
minutes. The primer must be
overwrapped with
DENSOLEN -Tapes within 8 hours
after application.
Surface Preparation
Prior to application of DENSOLEN Primers the surface has to be
cleaned thoroughly. Moisture and ice
have to be removed by drying with a
torch flame. Rust, dirt, residues of
welding electrodes, varnishes,
temporary corrosion protective
coatings and others must be
completely removed. To remove
grease and oil use an organic
solvent, e.g. petroleum spirit or
ethanol. Under unfavourable climatic
conditions an additional drying of the
pipe may be necessary.
Application temperatures
Ambient
Pipe surface
Unit
°C (°F)
°C (°F)
Machine Application
Vigorously stir DENSOLEN -Primer
in the original container prior to
application. Fill storage tank of
priming machine and seal original
container carefully after use. The
uniform thin coating achieved by
machine-applied DENSOLEN Primer allows the immediate
wrapping of DENSOLEN -Tapes.
DENSOLEN -Primer can be applied
by distributing felts. DENSOLEN MT25 can also be airless sprayed.
Take care that clean or new
distributing felts are in use and that
spray nozzles are in good condition.
After use, all equipment must be
cleaned thoroughly with petroleum
spirit.
-40 up to +60 (-40 up to 140)
above dew point up to +85 (185 )
Ordering Information & Packaging
Dimensions
[mm]
4 tins per carton 108 x 132
Drum
257 x 180
Drum
257 x 280
Drum
590 x 890
Packing
Contents
[l]
1
5
10
180
DENSO GmbH
P.O. Box 150120 | 5 1344 Leverkusen | G ermany
+49 214 2602-0 | +49 214 2602-217
www.denso.de | i nfo@denso.de
HT
0,92
4,70
8,70
168,0
Gross weight [kg]
HT25
MT25
8,60
9,0
168,0
170,0
Our product information, our application recommendations
and other product related documents are made for your
convenience only. Since many installation factors are
beyond our control, the user shall determine the suitability
of the products for the intended use and assume all risks
and liabilities in connection therewith. All information
contained in this document is to be used as a guide and is
subject to change without notice. Our General Sales
Conditions, which are available at www.denso.de, shall be
decisive without any exception.
Issue 08/2012 PI DENSOLEN  -Primer HT, HT25,
MT25 (GB)
This is a translation from the original German Application Instruction of DENSO GmbH. In case of any discrepancy or any dispute arising on the interpretation of this Product Information, only the german text of the
respective German Product Information, which is available at www.denso.de, shall be decisive. The legal relationship shall only be governed by German law.