Sigint Solutions



 hsf44-shielding-paint Electrically conductive primer coating for shielding of high-frequency radiation (HF) and low-frequency electric fields (LF). Based on a high quality pure acrylic binder. Highly breathable, very low VOC content, free of solvents. Our top-selling, well-established shielding paint, with improved formula.

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Intended use
Electro-conductive coating on basis of a pure-acrylic binder for the protection against high-frequency electromagnetic fields and low-frequency electric fields. Recommendation for exterior use. Based on a high quality synthetic binder. For the shielding of high-frequency radiation (HF) and low-frequency electric fields (LF).

● Best moisture resistance, adhesive tensile strenght and film resilience of our paints
● Breathable, after drying odor free
● Application: Interior, exterior, technical applications
● Attenuation: 38 dB, two-layer 45 dB

Frost resistance
This product is not frostresistant on shipping. At longfrost periods during winter time,the shipping can be rescheduled by a few days. Our frost resistant shielding paint HSF54 is our alternative that can always be shipped.

Screening attenuation
The screening attenuation is regularly tested in our own EMC laboratory. We have measurement setups due to the following standards: ASTM D4935-10, IEEE Std 299-2006, IEEEE Std 1128-1998, ASTM A698/A698M-07. Please find the test report at our homepage directly on the product page.

Areas of application
  • In private areas for the protection against cell phone towers, TV and radio broadcasting antennas, radar, digital standard cordless telephones, wireless networks or power supply lines.
  • In commerce, science, research and defence facilities to prevent interception of data from wireless networks (data-stealing), to protect potentially bugged conference rooms or to shield technical equipment.
  • At military facilities or airports to protect against radar.
  • In medical facilities to prevent wrong measurements in patients (ECG/EEG).
  • In the industry, e.g. at car or computer producers and in development deparments.
  • In prisons to hamper unauthorized cellular calls.
  • Further applications: Data centers, technical rooms, schools, nurseries, hotel rooms, hospital rooms, recording studios, etc.

Corrosion resistance
Without metal particles and therefore long-term durable and not oxidizing.

Technical Data


Attenuation depending on application in one layer 38dB (shielding effectiveness of 99.984 %) or in two layers 45dB (shielding effectiveness of 99.997 - 99.997 %). The shielding attenuation is regularly tested by Professor Dipl.Ing. Pauli at the University of the German Federal Armed Forces in Munich according to the standards ASTM D4935-10 and/or IEEE-STD-299-2006. The expert reports are available upon request. hsf55 shielding paint graph

  • Attenuation depending on application: Single-layer 38 dB, double-layer 45 dB.
  • Coverage: Indoor 7.5 m²/l; outdoor 5 m²/l.
  • Adhesive tensile strength: 2.8 N/mm².
  • Surface: Viscoplastic, not suitable as final coat.
  • Sd-value: ~ 0.1 m = highly breathable.
  • VOC-content*:  0.0 g/l = zero emission.
  • Density: 1.25 kg/l.
  • Viscosity: 500 mPas.
  • Non-volatile content (solids): 52 %.
  • pH-value: 7 - 8.
  • Packaging units: 1 / 5 liter.
  • Frost resistance in delivery form**: Not Frost Resistant
  • Shelf life: 1 year (see paint container).
  • Color: Black.

* VOC = Volatile organic compounds. The actual EU limit value for wall paints is 30 g/l.
** The given frost resistance is only valid liquid in the container, of course on the wall its permanent frost-resistant.

Material Handling

Top coating
Preferably covered with plastic bonded, water-based emulsion paints, dispersion silicate paints,
facade paints or silicon resin paints. Not applicable are pure mineral paints (clay, loam, chalk,
silicate). Please find appropriate product recommendations in the technical data sheet.
Due to the high adhesive tensile strenght (to ETAG 004 for EIFS-systems, minimum 0.08 N/
mm²), applicable directly underpure organic plaster, no mineralpasters!

Must be grounded! We recommend interior the grounding strap EB2 plus grounding set
GW or GB, exterior the fiber additive AF3 plus the grounding set GE.

Synthetic dispersion, graphite, water, carbon black, additives, preservative (MIT, BIT)

Optional: Fiber additive AF3
This paint is formulated without conductive carbon fibers to allow airless spraying. For crack
bridging and consequential a better grounding we advise to mix in the fiber additive AF3.

Safety notes
This paint has a high coloring power, so please proceed with care. Wipe off stains immedi­ately with damp cloth. Do not let stains dry up. Do not inhale spray mist! Use and let dry only in well ventilated areas! Do not eat, drink or smoke during painting! Rinse thoroughly immediately after skin or eye contact!

This product (Cat. A/a) contains  0.0 g/l VOC.The EU limit value is 30 g/l (by 2010).

Water, pure-acrylic binder, graphite, carbon black, eco-surfactant, eco-defoamer, thickener, preservative. Paint contains MIT (2-Methyl-4-isothiazolin-3-on) and BIT (1,2-Benzisothiazolin-3-on) as preservation substances. Information for allergic persons under telephone number 0049-8531-31713-8.

Grounding regulation
Only skilled electricians listed in the register of your electricity supplier are permitted to execute grounding measures! Pay attention to the following points: Protective measures against electric shock to DIN 57100/VDE 0100 part 410 + part 540, grounding to DIN/VDE 0100 part 410 + part 540, visual inspection and process testing to DIN/VDE 0100 part 610 part 4+5 and EMC to VDE 0100. Grounding measures are only permitted in TNS or TT networks! Grounding measures may never be executed in network forms with combined PEN wiring! A leakage/fault circuit breaker (FI/RCD) with less than 30 mA must be installed. Find more information on this in our grounding instructions sheet.

Grounding accessories
For grounding we only recommend our special grounding accessories. Interior: grounding strap EB2 plus grounding set ESW or ESW+, Exterior: the fiber additive AF3 plus the grounding set ESA.

Material Application

Area of application
Typical application for interior and exterior walls and for ceilings. Floor space: Bulk laid floor cover­ings (carpets, laminat, etc.) can be laid directly onto the shielding paint. Pay attention, that the shielding paint is not damaged! In case of glued floor coverings (carpets, cork, laminate, etc.) the shielding paint has to be aftertreated with a solvent free priming coat to improve the adhe­sion. We advise against bonding e.g. real-wood parquets, the adhesive tensile strength of the shielding paint is probably insufficient.

Interior approach
  • Drill holes for ESW grounding plate.
  • Ground-strap EB2 has to be applied uninterrupted in one piece through all painted surfaces, as stated in our grounding instructions sheet.
  • Apply the shielding paint in one or two layers, depending on the favored shielding effectiveness. Apply second coat of shielding paint to the area where the grounding plate ESW will be mounted.
  • Allow the paint 24 hours to dry.
  • Fix the ESW grounding plate.
  • More procedures see Final coat.

Exterior approach
  • Level out the mounting surface for grounding plate ESA.
  • Drill holes for the grounding plate ESA.
  • Apply the shielding paint in one or two layers, depending on the favored shielding effectiveness. Apply second coat of shielding paint to the area where the grounding plate ESA will be mounted.
  • Allow the paint 24 hours to dry.
  • Fix the ESA grounding plate and glue the top cover.
  • More procedures see Final coat.

Application temperature

Minimum application temperature: +5°C / 41°F. This temperature applies also for the drying time!

Excellent adhesion on various undergrounds like existing emulsion paints, sheetrock, wall­paper, cement, plaster, masonry, wood, etc. Always consider: The underground needs to be solid, clean, degreased and dry. Absorbent or porous surfaces must be prepared with a primer. Old coats of paint or old wallpapers which can be etched by water, should be removed.

The conductive particles deposit on the bottom of the paint container after a prolonged storage. There-fore shake the paint container well or mix it thoroughly with an electrical paint stirrer.

The shielding paint is ready for use. Never mix with water or other coating materials!

  • Use a first-class paint roller with a pile height of 10-13 mm.
  • Limited usable are lacquer-rollers, foam-rollers or brushes, the coating layer often gets too thin for a good attenuation!
  • To achieve a constant high attenuation, it is essential to apply the shielding paint with equal thickness; do not skip areas! Always soak the paint roller with the equal amount of paint and try to coat equal surfaces!
  • The pigmentation size is under 200 ¼m, spraying with airless equipment is possible with bigger nozzles.
  • Allow to dry for 24 hours.

Final coat
To protect the soft/viscoplastic surface of this shielding paint against mechanical damage and humidity, we recommend two top coats:
Interior: With high-quality, good covering, plastic bonded dispersion emulsion paints or dispersion silicate paints (e.g. KEIM Biosil, Ecosil, Optil). Natural resin paints are usable with some limitations. Alternatively paste over with wall­papers, glass fabrics, etc.
Exterior: With high-quality , good covering, highly hydrophobic dispersion emulsion paints or silicon resin paints.
Under plaster: Due to an adhesive tensile strenght of 1.9 N/mm² in conformity with ETAG 004 for EIFS-systems (stipulates minimal 0.08 N/mm²), this shielding paint is also usable directly under pure plastic bonded plaster. Never use mineral plasters, no adhesion!
Never use: Pure mineral bonded coatings with clay, loam, chalk or silicate adhere very bad on this shielding paint, they should never be used!

The consumption depends on the character and absorbency of the underground. Typical interior productiveness: 7.5 m²/l. Typical exterior produc­tiveness: 5 m²/l. Rule: the higher the consumption, the better the attenuation.