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🛡️ Protect Your Tech Like a Pro — Clear, Clean, Certified!
MG Chemicals 419D is a 55 mL premium acrylic conformal coating designed for professional-grade protection of electronic circuits. It offers a crystal-clear, durable finish that resists moisture, corrosion, static, and thermal shocks. Certified UL 94V-0 flame retardant and free from hazardous solvents like toluene and xylene, it ensures safer application and environmental compliance. The coating fluoresces under UV light for easy inspection and supports easy rework by allowing soldering through or removal with specialized thinners, making it ideal for high-moisture and precision electronics environments.









| Customer Reviews | 4.8 out of 5 stars 813 Reviews |
P**Y
Works Great: Use Caution While Applying
I use this coating on PCBs that are milled on a CNC. Sealing these PCBs makes sense as I live in a high humidity environment. This material dries to the touch in about 30 minutes, but I give it 24 hours to fully cure. VERY IMPORTANT: 1) Heed the WARNINGS re the very flammable vapors and DO NOT breathe this stuff as it's quite dangerous. But, after it cures, the VOCs decrease enough that I can barely smell any. 2) Wear a respirator (Do NOT use a N95/KN95/surgical type mask), even if using outdoors. Also, wear safety glasses, and gloves (I use Nitrile) when applying. CLEANING: As noted, there are 2 included brushes. However, I use "acid brushes" (you can buy these in bulk) and both 70% and 99% isopropyl alcohol to clean the acid brushes. You'll need to use a paper towel and work the brush end to get the coating to "glob" up and detach from the brush. It's a bit of work, but you can reuse a brush several times. Handy Hint: Acid brushes tend to have 3/4" bristles. I cut these down to a tighter 1/4" for more accurate application. Have fun, but be safe! Picture: This closeup shows what a coated and non-coated area looks like after curing. When wet it has a slight pinkish tinge but, as shown, it dries clear.
P**Y
Don't be a Non-Conformist: Get Professional Results with no Ultra-Violet Curing.
Wear safety goggles. Very strong order, so use in a fan vented area. I coated both sides of an 8x4 inch (200x100 mm) PCB (for a washing machine) in a small bathroom with a vent fan on and it didn't stink up the house. Make sure the PCB is TOTALLY clean else the coating will pull back and leave uncovered spots. I use 95+ Isopropyl Alcohol with an Acid Brush (bristles cut to a stiff 1/4 inch or 6 mm) for cleaning and let it air dry. Make sure the board is above 60 F (16 C) and in less than 50% humidity for at least a day... you don't want to trap moisture in the board. It works well with an Acid Brush with 3/4 inch (18 mm) bristles. I applied the coating in one very thick coat, but two thinner coats may be better. The coating self levels and fully dried in 30 minutes (one side at a time). It is crystal clear and durable. Time will tell if it keeps corrosion at bay in a humid area like a wash room.
C**C
Perfect for HV supply repairs
Used it for re-applying insulating conformal coating on an HV 3kV power supply after a reapair. Worked perfectly, no more arcing. Use a mask and gloves when applying.
L**A
Great stuff. Beware fumes.
I purchased this stuff to conformally coat Raspberry Pi Zero computers to provide moisture and shock resistance in a wearable project where the finished look was key. It dried quickly with a crystal-clear, bubble-free finish, and it did not corrode or damage the boards. Even LED status lights were still clearly visible, almost as if they weren't coated at all. The liquid product is thick enough to stick to the sides of electronic components without running off, but thin enough to form only a thin layer. The one downside is that the fumes emitted as the coating sets are very aggressive-- I could smell them throughout my three-bedroom apartment and felt a bit lightheaded after working with it for about 15min. Make sure to open a window/door, turn on a fan, and perhaps even use a respirator when applying this product. Luckily, the coating has little or no odor once it sets, although it may off-gas a little if heated. Overall, this stuff is great; just be smart and protect your lungs.
W**I
Seems fine, but ZERO application instructions
Seems like it will work fine. Applied ok with small brushes (2x) supplied. But there are zero instructions for use. Plenty of warnings, but no how-to. Very strong smell, so plan on that.
H**.
Quick drying and effective!
I highly recommend this if you need to coat PCBs. The spray bottles always suck! I bought 3 spray bottles, and they all had the same issue- they squirt out big globs of liquid acrylic, making a huge mess and covering your fingers. This stuff comes in a bottle with 2 brushes. I did a large number of boards, so I used a cheap brush and mini paint try from home depot to brush this stuff on. It's solid in about 15 minutes, whereas the other brand I used took 24 hours to be touchable. Far less fumes as well vs. a spray.
J**E
Good stuff. Big bottle. Good protection.
Good product. I used this to insulate the repair that I maid to my headphone wires. I also plan on using this to insulate some led builds that I bought for my motorcycle. The buyer just needs to know that the brush isn't attached to the cap. It still comes with a brush. It's just not stored inside the cap. Minor change but still worth noting. Great product. Thank you!
B**S
Applies very nicely
Used the acrylic conformal coating to protect several circuit board in a 2000 Chevy Blazer automatic A/C control module. These control modules are very susceptable to printed circuit board (PCB) corrosion. The coat applies nicely and self levels. Hopefully, the risk of module failure due to PCB corrosion has been greatly reduced.
A**X
Good product but the silicone modified coating is better.
Great product, UV illumination, brushes can be easily cleaned with Isopropyl alcohol and be reused, you should know that the acrylic does not bond to the surface, it is merely a coat that can be pretty easily scratched off, useful for rework but the board should be protected from physical damage or it will easily break seal. To protect from damage during manipulation, I would recommend the silicone modified coating or liquid electrical tape.
X**.
MG Chemicals 419D 🛡️ recubrimiento acrílico excelente para proteger PCB con precisión
Revestimiento de conformación acrílico transparente para proteger placas electrónicas, soldaduras, pistas y componentes frente a humedad, polvo, suciedad y pequeños riesgos de corrosión superficial. Le doy 5 estrellas porque cumple muy bien como barniz técnico para PCB, especialmente en reparaciones, modificaciones o trabajos donde interesa aislar zonas sensibles, pero exige preparación, ventilación y una aplicación fina y controlada. Valoración: ⭐⭐⭐⭐⭐ 4.8/5 🧪 Qué producto es 🛡️ Es un conformal coating acrílico transparente, pensado para formar una película protectora sobre placas electrónicas. 🔬 Tiene sentido en PCB, soldaduras, zonas reparadas, placas expuestas a humedad ambiental o trabajos donde se quiere añadir aislamiento superficial. ⚡ No es pegamento, no es pasta térmica y no es silicona: es un recubrimiento protector. 🧴 El formato pequeño de 55 ml viene muy bien para trabajos precisos, reparaciones puntuales y electrónica de detalle. 🧱 Al ser acrílico, resulta más manejable que otros recubrimientos más permanentes, como algunos epoxi o siliconas técnicas. 🛠️ Aplicación y uso real 🧽 Lo más importante es limpiar bien la zona antes de aplicar: sin grasa, flux, polvo ni restos de humedad. 🖌️ Conviene aplicar capas finas, no una capa gruesa de golpe. Así seca mejor, queda más uniforme y se reduce el riesgo de burbujas o acumulaciones. ⏱️ Hay que respetar el tiempo de secado antes de montar, cerrar o alimentar el equipo. 🌬️ La ventilación es obligatoria: huele a disolvente y no es un producto para usar en una habitación cerrada sin extracción. 📐 Para zonas delicadas, va muy bien aplicarlo con pincel fino, palillo o herramienta de precisión, especialmente alrededor de componentes pequeños. ⚠️ Advertencias técnicas importantes ⚡ No debe aplicarse sobre conectores, pads de contacto, ranuras, contactos de batería, zócalos, interruptores, sensores, puertos USB, pines o zonas que necesiten conductividad eléctrica. 🔥 Hay que mantenerlo alejado de fuentes de calor, chispas o llamas mientras se aplica y seca. 🔌 No se debe alimentar la placa hasta que el recubrimiento esté correctamente seco. 🧯 En placas con componentes muy calientes, conviene evitar cubrir zonas que necesiten disipar calor directamente. 🔎 Si se usa como protección alrededor de metal líquido, sirve para aislar componentes cercanos, pero no sustituye una aplicación cuidadosa del metal líquido ni evita daños si se derrama demasiado. 🧤 Mejor usar guantes, buena luz y trabajar con calma, porque una mala aplicación en conectores o mecanismos puede dar más problemas que soluciones. ✅ Lo que más me ha gustado 🛡️ Muy útil para proteger PCB y zonas reparadas. 🔬 Permite aislar componentes pequeños con bastante precisión. 🧴 El formato de 55 ml es práctico para trabajos puntuales. 🧱 Acabado transparente y limpio si se aplica en capas finas. ⚙️ Buena opción para electrónica, reparaciones y modificaciones delicadas. 🧽 Una vez seco, deja una película protectora bastante discreta. 📦 Ocupa poco y dura bastante si se usa sólo donde hace falta. 💶 Muy buena relación utilidad-precio para quien trabaja con placas. ⚠️ Lo que menos me ha gustado 🌬️ El olor a disolvente obliga a usarlo con buena ventilación. 🖌️ Hay que aplicarlo con cuidado para no invadir conectores o contactos. ⏱️ Requiere esperar bien el secado antes de manipular o alimentar la placa. 🧼 La preparación previa de la superficie es clave; si aplicas sobre suciedad o flux, el resultado empeora. 🔎 En trabajos muy pequeños hace falta buena luz y pulso. ⚡ No perdona tanto como parece: si cubres una zona que debe hacer contacto, toca limpiar o rascar. 📐 No es producto para usar “a lo bruto” sobre toda una placa sin pensar qué zonas conviene enmascarar. 📊 Notas por criterio 🛡️ Protección de PCB: 4.9/5 🔬 Precisión de aplicación: 4.6/5 🧱 Acabado transparente: 4.8/5 🧴 Formato y aprovechamiento: 4.7/5 ⚙️ Utilidad en reparaciones/mods: 5.0/5 🌬️ Comodidad de uso: 4.0/5 ⚠️ Exigencia técnica: 4.2/5 💶 Relación calidad-precio: 4.8/5 🧮 Resultado ponderado 0.25×4.9 + 0.15×4.6 + 0.15×4.8 + 0.10×4.7 + 0.15×5.0 + 0.05×4.0 + 0.05×4.2 + 0.10×4.8 = 4.76 Redondeo final: 4.8/5 🧠 En resumen Me parece un recubrimiento acrílico muy bueno para proteger electrónica cuando se usa con criterio. Es especialmente útil en placas reparadas, zonas expuestas, trabajos de soldadura, mods y aislamiento de componentes pequeños. El acabado transparente queda limpio y permite proteger sin dejar una capa aparatosa. La clave está en no tratarlo como un barniz cualquiera. Hay que limpiar, enmascarar lo que no se debe cubrir, aplicar poca cantidad y dejar secar bien. Bien usado, aporta mucha tranquilidad en zonas delicadas; mal usado, puede terminar aislando conectores o contactos que no debían cubrirse. 🎯 Veredicto El MG Chemicals 419D-55ML me parece un producto excelente para trabajos técnicos en PCB. Le doy 5 estrellas porque cumple justo lo que espero de un conformal coating acrílico: protege, aísla, deja buen acabado y permite trabajar con precisión en reparaciones o modificaciones electrónicas. No es para aplicarlo sin pensar ni para cubrir toda una placa indiscriminadamente. Hay que tener claro qué zonas proteger y cuáles dejar libres. Usado con ventilación, limpieza previa, capas finas y paciencia, es una herramienta muy útil para electrónica fina, mantenimiento, reparaciones y protección adicional en montajes delicados.
G**A
MG Chemicals 419D Rivestimento conforme acrilico Premium
MG Chemicals 419D Rivestimento conforme acrilico Premium lo uso per proteggere lo stak del drone FPV comodissimo si asciuga velocemente e ci si puo' saldare sopra senza problemi, ottimo isolante
U**0
Funktioniert sehr gut
Ich habe es für mein CPU und GPU benutzt und es ist sehr gut für Liquid Metall.
D**W
"Does what it says on the tin"
This conformal coating performs exactly as described.. It's a reasonably thick, varnish like fluid that is easily applied using the supplied brushes (2 of them in the pack). The brushes are thin enough to fit into those awkward places, with the bristles being just the right size to hold enough, but not too much fluid. They were easily cleaned after use with White Spirit, so can be reused. The fluid forms an even coat that dries quickly yet performs well in protecting electronic circuit boards. At 55ml the bottle may look small, but it goes a long way. I coated both side of my cars control unit/fuse box without making a noticeable drop in the level in the bottle.
Trustpilot
5 days ago
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