Description
Karl Deutsch KD-Check FWP-1 Penetrant is a highly sensitive testing aerosol spray for the finest cracks in critical components (sensitivity class 2).
Applications
- Mainly used with serial testing of critical components, for example in the aerospace and automotive industry
- When used in stationary systems, a large number of components can be checked reproducibly for finest cracks within a short period of time
- In combination with dry developers, which are applied by spraying or electrostatically, the sensitivity during testing is increased even further
Characteristics
- Oil-based Fluorescent Penetrant
- Water-washable and solvent-removable
- Suitable for ferrous and nonferrous metals (Check suitability for plastics before application)
- Reduced test agent consumption due to low viscosity and optimum dripping properties
- Excellent wetting properties, especially on smooth surfaces
- Very good wash-off properties on rough surfaces
- Low background fluorescence
- High test reliability due to strong contrast formation
- Low sulfur and halogen content according to DIN EN ISO 3452-2 and ASME Code, Section V, Article 6
- Can be used in a temperature range from +10 °C to +50 °C
- Sample tested according to DIN EN ISO 3452-2
- Size: 500ml
- Packaging type: aerosol spray
Application notes
- Clean parts thoroughly. Ensure parts are free from grease, oil and other pollutants. Defects must be open to the surface. Dry the parts after cleaning. Recommended cleaner: KD-Check PR-1 (Ref. 23201454) or PR-2 (Art. No. 9907).
- Apply Penetrant KD-Check FWP-1 to the clean and dry surface and allow to dwell for 5 – 10 minutes.
- Remove the excess Penetrant KD-Check FWP-1 from the surface under Black-Light-control, either
a) by rinsing it off with water or
b) by wiping it off with a clean, lint-free cloth, barely dampened with cleaner KD-Check PR-1.
Dry the surface. - Apply a wafer-thin film of Developer KD-Check SD-1 (Ref. 23201455) under Black-Light-control to thedry surface from a distance of about 20 cm. Too much developer may hide fine defects! Soon defects become visible as yellow-green fluorescent lines and development is complete after 5 – 10 minutes. Alternative KD-Ckeck DD-1 dry developer (Art.-No. 9908) may be used.
Technical Specifications
| Karl Deutsch Manufacturer Nr. | 9904.1 |
| Sensitivity (DIN EN ISO 3452-2) | 2 (medium sensitivity) |
| Density 20°C (DIN 51 757) | 0,9 g/cm³ |
| Flash point (DIN 51 755) | 93 °C |
| Viscosity, 20°C (EN ISO 3104) | 10,6 mm²/s |
| Corrosive ingredients (DIN EN ISO 3452) | Halogene (F + Cl): < 20 ppm Sulfur: < 10 ppm |
| Min. Storage Time | 3 years (at room temperature) |
Attention
- Dangerous substances and/or dangerous goods, see safety data sheet.
- Not available in all countries.
- Express delivery not possible.
Hazard Warnings (CLP)

Signal word: Danger
Hazard Statements (H-phrases)
- H304: May be fatal if swallowed and enters airways.
- H319: Causes serious eye irritation.
Safety Statements (P-phrases)
Prevention:
- P280: Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
Response:
- P301+P310: IF SWALLOWED: Immediately call a POISON CENTER/doctor/…
- P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
- P331: Do NOT induce vomiting.
- P337+P313: If eye irritation persists: Get medical advice/attention.
Disposal:
- P501: Dispose of contents/container to hazardous waste.
Other Hazards
- No data available
Hazardous materials. The forwarding charges may be raised, if shipping to: DE, AT, NL, GB, CH, CZ, IT, ES, FI, NO, BE, IE, RO, PL, FR, PT, LU, DK, LI, GR, SE, SK, BG, SI, CA, LT, EE, LV, HR, SA,
KARL DEUTSCH Prüf- und Messgerätebau GmbH + Co KG, Otto-Hausmann-Ring 101, 42115 Wuppertal, GERMANY, +49 202 7192 0, [email protected], www.karldeutsch.de






rosa_s –
Pleasant to use at home. Easy to use, without making a mess.
Pierre –
Feels sturdy. Perfectly packaged. Reliable and stable.
angelo88 –
100% recommended.
luis88 –
No issues at all so far. Fast and secure delivery. Arrived as promised. Very easy to use.
Zoe –
Super fast delivery, thank you. Better than anything I’ve tried before. Very effective; I noticed a change in just one week. Very satisfied, it’s even better than I expected.
valeria88 –
Super fast delivery, thank you.
clara_paris –
Very satisfied, better than I expected. Super fast delivery, thank you. The quality pleasantly surprised me.
Zoé –
Really noticed a difference after using it! Surprisingly good quality for the price. The quality pleasantly surprised me. Very fast delivery, thank you.
Evelyn –
Better than anything I’ve tried so far. Super fast delivery, thank you.