STIRRI® ASM-TF™ – The Original Classic No-Clean Universal Tacky Flux

The Prosumer's Choice for Rework, Automated and Hand-Soldering

STIRRI® ASM-TF™ is a high-performance, universal no-clean tacky flux engineered for both leaded and lead-free solder applications. This versatile flux is ideal for a broad range of soldering processes, including manual hand-soldering and automated assembly lines utilizing pneumatic dispensers, solder paste printers, BGA machines, and reflow ovens. The formulation includes our proprietary HX-Booster™ package coupled with a chloride activator for superior oxide stripping.

Featuring an RMA-grade performance, ASM-TF™ boasts an optimal viscosity and a light, creamy flux body, leaving a clear, benign residue that can be reliably left on the board, eliminating the need for post-soldering cleaning in many applications. It also incorporates a QC-Aid™ optical tracer, enabling instant visual cleaning Quality Control (QC) certification through inspection in the blacklight/UV light. The flux provides a nearly odorless formulation, enhancing workplace safety and comfort. For situations requiring residue removal, it is easily cleaned with common solvents such as isopropanol (IPA), acetone, or industrial no-clean solvents. Optimal cleaning results are achieved when the Printed Circuit Board (PCB) is still warm.

The HX-Booster™ package, which augments halogens, may cause the unactivated residue to exhibit temporary conductivity. This characteristic ensures superior soldering performance and can be fully addressed by optimizing the soldering profile with additional time and heat, or by cleaning the assembly. The activated residue is benign and fully conforms to J-STD-004C for no-clean formulations.

Key Performance Advantages

• RMA-Grade Performance: This flux boasts optimal viscosity and a light, creamy flux body, leaving a clear, benign residue that can be reliably left on the board. While classic RMA uses polymerized rosin, resulting in a darker color and residue, ASM uses hydrogenated rosin, which has similar properties but is extremely clear.
• Versatile Application: Ideal for a broad range of soldering processes, including manual hand-soldering and automated assembly lines utilizing pneumatic dispensers, solder paste printers, BGA machines, and reflow ovens.
• Superior Clarity: The translucent residue allows for an unobstructed view of solder joints and IC pins, offering ultimate control over the soldering process.
• Non-Corrosive: This flux is non-corrosive, and its activated residue is fully benign and can be left on the PCB.
• Excellent Component Hold: Maintains a strong tack to hold components in place, yet allows for easy repositioning with a hot air gun.

Suitable for:

General electronics repair, hand soldering, BGA rework, and automated soldering processes.

Compliance and Standards

• Classification: ROL0 (Halide-free <0.05%)
• Environmental Compliance: REACH-compliant and environmentally/health-friendly.

Formulation Details

• Rosin/Synthetic Resin Blend: A balanced blend of reprocessed rosin crystal and fully synthetic resin provides excellent soldering performance, minimal residues, and broad alloy compatibility.
• Low-Residue Characteristics: Ideal for applications where cleaning is challenging due to component density, equipment limitations, temperature constraints, or restricted access.

Manufacturing and Application

• Flux Application Method: The flux is designed for use with various modern dispensing equipment, including positive displacement and time/pressure systems, as well as manual application.
• Solder Alloy Compatibility: The flux exhibits excellent compatibility with a wide range of solder alloys, including SnAgCu and SnPb alloys, making it an all-purpose solution.

Ready for Implementation

While ASM-TF™ is designed as a no-clean flux, cleaning may be necessary prior to conformal coating to ensure optimal coating adhesion and long-term reliability, particularly in harsh operating environments. As a supplier of both fluxes and conformal coatings, we can offer expert guidance on selecting the appropriate cleaning procedures and conformal coating materials for your specific application. Contact us to discuss your requirements.

For even greater performance and modern features, explore our next-generation V3 and V4 series fluxes. V3-TF is the high-performance evolution adding REACH compliance and dual tracers (Visual QC-Aid™ and Olfactory QC-Aid™). While a reliable product, V3 has certain design considerations regarding its longevity and cleanability addressed in V4-TF, next-generation solution engineered to enhance the performance of V3. Its key advancements are AIRfree™ technology, which provides a splatter-free, consistent flow, and an improved solvent system with a higher boiling point for enhanced longevity under hot air and superior cleanability. However, if these enhancements are not necessary, we recommend you stick with the original ASM formulation to benefit from its proven, robust chemistry and much lower cost.

ROL0-Klassifizierung – no-clean und nicht korrosiv. Halogenfrei (<0,05 %). Oberflächenisolationsbeständig. Kein Kupferspiegeldurchbruch. Geringe elektrochemische Migration (Abfall unter 1 Dekade)

42-54 mPa/s (Malcom @ 10 RPM/25ºC (x 10³mPa/s))

„No-Clean“ bezeichnet die Reinigungsmethode gemäß IPC-Standard und bedeutet nicht, dass das Flussmittel keine Rückstände hinterlässt. No-Clean bedeutet vielmehr, dass das Flussmittel für mehrere aufeinanderfolgende SMT-Baugruppen auf der Leiterplatte verbleiben kann, aber auch keine Korrosion verursacht, wenn es auf unbestimmte Zeit belassen wird. Eine Reinigung kann jedoch notwendig sein und ist wünschenswert. No-Clean-Flussmittel lassen sich leicht mit industriellen Lösungsmitteln in Ultraschallgeräten oder mit handelsüblichen Flussmittelrückstandsentfernern wie STIRRI HydraSweep™ entfernen.

Dieses Produkt enthält kein Dosierset – ein separater Kauf!

Das Dispensing Kit ist ein Zusatzgerät für die manuelle Dosierung, mit dem mit einem Kolben ähnlich wie bei einer medizinischen Spritze ein Druck erzeugt wird.

Luftspritzen für pneumatische Dosiermaschinen verwenden einen Kolbenstopper anstelle eines Kolbens. Entfernen Sie den Kolben nicht, da er die beste Abdichtung bietet und den Kontakt mit Luft verhindert!

Dieses Material ist als REACH-konform zertifiziert – es werden keine Rohstoffe aus der REACH-Einschränkungsliste besonders besorgniserregender Stoffe verwendet.