🧩 ACM – Polyacrylate Rubber
(An oil and heat-resistant synthetic elastomer obtained by copolymerizing acrylic esters. ACM features excellent resistance to engine oils, transmission fluids, and oxygen, maintaining its properties up to 170–180 °C.)
🔹 What is ACM
ACM (Acrylic Rubber) belongs to the family of acrylate-based elastomers. At ReplastMD, we treat it as the “hot-fluid specialist.” While it is more rigid than AEM and has limited flexibility below 0 °C, it excels at high temperatures and in oily environments. It is the preferred material for engine gaskets and transmission seals where thermal stability and resistance to oxidative aging are critical.
🔧 Composition & Properties
- Polymer Base: Acrylate copolymer (Methyl/Ethyl acrylate esters).
- Density: ~ 1.20 – 1.30 g/cm³.
- Operating Range: Up to +180 °C.
- Chemical Resistance: Excellent (engine oils, transmission fluids, oxygen).
- Visuals: Semi-rigid, smooth black rubber with slow recovery.
🚗 Where it is used in the automotive industry
| Component | Example parts | Observations |
| Oil / Valve Gaskets | VW, Renault, Toyota | Resists up to 180 °C |
| Vacuum / EGR Hoses | BMW, Hyundai | Cost-effective alternative to FKM |
| Oil Seals / Boots | Dacia, Peugeot | Durable sealing, good pressure resistance |
| Pump / Valve Gaskets | Mercedes, Ford | Stability in contact with synthetic fluids |
🔧 Welding and Bonding Methods
| Method | Optimal Temp | Observations |
| Hot Air | ✅ 160 – 180 °C | Easy to weld/fuse, no carbonization |
| Chemical Bonding | ✅ Recommended | Acrylic-specific adhesives (Loctite® 480/495) |
| Heat Plate | ⚠️ Limited | Possible for thin sections only |
💡 ReplastMD Recommendation: Weld at ~170 °C or bond using a professional acrylic adhesive. ACM is the perfect choice for seals and hoses that must withstand hot oil, pressure, and oxidation without exposure to extreme cold.