🧩 ASA – Acrylonitrile Styrene Acrylate

(UV-resistant weldable plastic used for car bodies and exterior automotive parts.)

🔹 What is ASA

ASA (Acrylonitrile Styrene Acrylate) is an amorphous thermoplastic similar to ABS but with excellent resistance to UV radiation and weathering.

It was developed as a superior alternative to ABS for parts exposed to sun, rain, and temperature fluctuations, maintaining its glossy appearance and color without degradation.

🔧 Composition

Acrylonitrile – provides chemical resistance and rigidity.
Styrene – provides gloss and processability.
Acrylate – replaces the butadiene found in ABS, providing UV stability and resistant color.
Density: 1.05–1.10 g/cm³.
Melting Point: ≈ 230–260 °C.

🚗 Where ASA is used in the automotive industry

Component	Example parts	Observations
Body Exterior	Grilles, mirror caps, motorcycle fairings, spoilers	High gloss, exceptional UV resistance
Interior / Decorative	Dashboard elements exposed to sun	Stable colors, no yellowing
Accessories / Tuning	Mirror covers, headlight housings, diffusers	Welds similarly to ABS
Other Applications	Truck parts, RVs, boats	Resists sun, water, and automotive paints

🔧 Welding Temperature and Methods

Method	Optimal Temperature	Observations
Hot Air	260 – 280 °C	Welds uniformly, no bubbles
Heat Plate (Mirror)	250 – 270 °C	Clean weld, gloss preserved
Manual Extrusion	240 – 260 °C	For cracks or thin edges

🔩 What to Weld ASA With (Material Compatibility)

If you’re wondering “what to weld ASA plastic with”, the answer is: ASA or ABS, as both have a similar chemical structure.

✅ Compatible with:

ASA ↔ ASA – best compatibility, homogeneous and glossy weld.
ASA ↔ ABS – frequently used combination in mixed parts (bumpers, caps, brackets).
ASA ↔ PC/ABS – possible, but requires careful thermal control.

❌ Incompatible with:

PP, PE, PA, PVC – different temperatures and structures, bonding impossible.

💡 ReplastMD Recommendation:

For automotive repairs, use original ASA rods. If unavailable, ABS rods can be used with the temperature adjusted by +10 °C. Avoid overheating — the acrylate tends to turn matte if the temperature exceeds 280 °C.

🏭 Manufacturers and Trade Names

BASF / INEOS: Luran® S
SABIC: Geloy® ASA
LG Chem: LUPOY® ASA
Chi Mei: Kibilac®
Trinseo: Magnum® ASA

🧠 How to Identify ASA

Engraved marking: >ASA<.
Glossy surface, does not change color under UV.
Faint sweet smell when burning.
Softens at 250–270 °C without bubbling.
ReplastMD practical test: if the part looks like ABS but doesn’t fade in the sun → likely ASA.

🛠️ ASA Welding at ReplastMD:

At our service center in Chisinau (Ciocana sector), ReplastMD performs professional ASA welding for mirror caps, grilles, decorative bumpers, and air diffusers, ensuring an invisible joint and restored UV resistance.