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Professional Silicones for Industry and Electronics – Proven Solutions You Can Trust



At SILRAY, you will find only high-quality silicones and technical materials, designed to perform where reliability, safety, and durability matter most. From advanced RTV-1 silicones for sealing and assembly, to oils, resins, and pastes, as well as precise two-component RTV-2 silicones for electronic potting – we offer products that protect equipment, extend its lifespan, and ensure peace of mind and consistency in daily operations.


If you are looking for materials that perform in conditions where others fail — you’ve come to the right place.

 
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    • Versatility in the Industry: Where Does ELASTOSIL® A07 Excel?

      Are you looking for a reliable sealing and coating material for demanding conditions? Discover ELASTOSIL® A07 TRANSLUCENT – a versatile silicone dispersion that remains flexible in extreme temperatures ranging from -40°C to +180°C. Thanks to its excellent primerless adhesion and flowable consistency that makes application easy, this product is perfectly suited for the HVAC industry, among others. Learn how to achieve the perfect silicone coating step by step and fully unlock the potential of this solution in your project.

      Read the full article to learn more. If you are interested in purchasing, please feel free to contact us!

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      A07
    • Elastosil

      ELASTOSIL® RT 622 Without Compromise. Why This Silicone Is So Hard to Replace – and What the Competition Really Offers

      There is no shortage of RTV-2 silicones on the market positioned as alternatives to ELASTOSIL RT 622. In practice, users most often turn to solutions from manufacturers such as Momentive (e.g. RTV 225, RTV 227), Dow (Sylgard 170, Sylgard 184), Shin-Etsu (KE-1300T, KE-1310ST), Elkem (Silbione RTV 440/450), or ACC Silicones (QSil 216/218). These are good materials – but they are designed with different priorities.

      This is where the key difference emerges. RT622 is not just “another potting silicone,” but a material with an exceptionally well-balanced combination of properties: softness, mechanical strength, and long-term stability. In many cases, alternatives turn out to be either too hard, mechanically weaker, or require adjustments to the processing technology. During initial testing, these differences may seem negligible – it is only in real-world operation that the gap becomes apparent.

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      RT622

    • A radiator isn’t everything. Why are engineers switching to WACKER® PASTE P 12 in droves?

      Even the best radiator won’t work without a good thermal paste—but do you really need to overpay for a famous brand? Meet WACKER® PASTE P 12. This reliable silicone paste can replace products like DOWSIL™ 340, Momentive YG6260, or Shin-Etsu G-746 without any modifications to your production process. It guarantees extremely low oil separation (<0.4%), cuts thermal resistance by half, and secures your supply chain.

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      Paste P12

    • Soft as a gel, tough as armor. Why WACKER SilGel® 612 is the best alternative to popular dielectric potting compounds

      Soft as a gel, tough as armor. Discover WACKER SilGel® 612. Are your current potting compounds damaging delicate components and breaking solder joints during temperature fluctuations? It’s time for a change. Find out why the ultra-soft WACKER SilGel® 612 is becoming the new standard in the electronics industry, successfully replacing legacy market leaders (including Sylgard 527). Secure your electronic assemblies and your supply chain.

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      Silgel
    • Elastosil

      ELASTOSIL® RT 622 in Traction Motor Repairs – Soft Protection with a Tough Reputation

      Traction motors operate in extreme conditions where traditional resins and varnishes often fail prematurely. This is why an increasing number of railway and tram service centers are turning to ELASTOSIL® RT 622 silicone. Thanks to its soft structure, high resistance, and excellent electrical insulation properties, this material can significantly extend the lifespan of refurbished components. To discover why RT 622 has become one of the most effective solutions in traction motor regeneration, read the full article.

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      Elastosil
    • Elastosil

      How Does ELASTOSIL® RT 628 Protect Transformer Windings?

      Transformer windings operate under extreme conditions—exposed to high temperatures, constant vibrations, and humidity. This is why flexible RTV-2 silicones are increasingly used for their protection. ELASTOSIL® RT 628 A/B provides durable electrical insulation, effectively compensates for mechanical stress, and maintains stability even at temperatures up to +180°C. Discover why this silicone has become a proven solution in modern electrical engineering and the power industry.

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      Elastosil
    • Cenusil

      Hard or Flexible? How to Choose the Perfect Mold-Making Silicone?

      Architectural concrete, precision resin casts, or perhaps chocolate molds? Every project requires a different rubber specification. Choosing the wrong silicone carries the risk of damaging your model and wasting money.

      In our latest guide, we compare three professional Wacker solutions: Cenusil M 830, Elastosil M 4630, and Elastosil M 4670. Find out when to opt for extreme flexibility and when to choose technical rigidity. Stop guessing – make an informed choice.

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    • Elastosil

      Elastosil RT 623 or RT 623 KR? Same product number, completely different working speed

      RT 623 or RT 623 KR? Although the name sounds similar, the differences in real production use are significant. The KR version was designed for fast cycles and mass production, while the standard RT 623 offers greater process control and working comfort for more complex molds. Find out which variant better suits your technology and learn how to choose the right silicone for real production conditions.

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    • Elastosil® E14 – a professional alternative to high-temperature silicone sealants for demanding applications

      Elastosil® E14 is a high-temperature RTV-1 silicone adhesive designed for use in demanding industrial environments. With heat resistance up to 250°C, a dense, paste-like consistency, and excellent adhesion to metals and glass, it is commonly used as a replacement for products such as DOWSIL™ 732 (Red), Momentive RTV 106, Loctite® SI 596, as well as standard red high-temperature silicone sealants.

      Unlike many commonly used sealants, Elastosil® E14 does not slump on vertical surfaces, retains its elasticity after curing, and provides a stable, durable bond even under intensive thermal cycling. It is the solution of choice wherever reliability, consistency, and long-term performance are essential.

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      E14

    • ELASTOSIL® E43 – when standard solutions stop working

      Not every silicone is the same. In demanding industrial and electronic applications, the differences between materials become apparent very quickly — especially where durability, adhesion, and resistance to operating conditions matter most.

      In this article, we take a closer look at ELASTOSIL® E43 — a specialized RTV-1 silicone adhesive that, thanks to its fluid consistency and exceptional adhesive properties, is often chosen where other solutions fall short. In practice, it is a material capable of taking on the role of several different products, simplifying processes and increasing the reliability of bonded joints.

      If you want to learn why E43 is regarded as one of the strongest solutions in its class, where it performs best, and what sets it apart from standard silicones — we invite you to read the full article.

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      Elastosil E43

    • Isopropanol — The Quiet Hero of Everyday Life. From Electronics to the Pandemic: Why IPA Has Become Essential in the Modern World

      From electronic servicing and industrial applications to household cleaning and the COVID-19 pandemic — isopropanol has become one of the most versatile chemical agents of our time. Why do technicians, hobbyists, and manufacturers rely on it so widely? And what makes this unassuming alcohol a bridge between the worlds of technology and everyday life?

      Discover how IPA has reshaped our approach to cleaning, hygiene, and precision work…

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      Isopropanol ISO

    • One system – many industries. Where does ELASTOSIL® VARIO truly prove its value?

      ELASTOSIL® VARIO is a modular RTV-2 silicone system that allows precise adjustment of hardness, elasticity, and reaction time to match a specific application. Thanks to its addition-cure chemistry, zero shrinkage, and excellent detail reproduction, the same system performs reliably in prototyping, industrial molds, electronics, crafts, and small-batch production. In this article, we show why VARIO is not a single product, but a versatile tool that provides real process control and a technological advantage across multiple industries.

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      Mold Makeing vario

    • WACKER ELASTOSIL® – a benchmark of quality in electronics and industry

      ELASTOSIL silicones are materials that set the standard for electronics protection, sealing of technical equipment, and industrial manufacturing. They combine durability, resistance to extreme conditions, and exceptional stability, making them suitable for the most demanding industries — from lighting and automation to power electronics, rail, and advanced assembly systems. In this article, we show how they form a cohesive family of solutions that genuinely enhance device reliability.

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      Elastosil

    • ELASTOSIL® E41 or E43? Seemingly similar — in practice completely different. Which one should you choose?

      Although ELASTOSIL® E41 and E43 belong to the same RTV-1 silicone family, their applications differ far more than it might appear at first glance. One creates perfectly smooth, crystal-clear coatings — the other forms strong, structural bonds that underpin the long-term durability of devices.

      If you want to understand why choosing the right silicone is critical to the reliability of electronics, lighting systems, and technical equipment, be sure to read the full article.

       
       
       
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      Elastosil

    • WACKER silicone pastes in practice: how do P, P12 and POWERSIL® AP differ, and how do you choose the right one?

      Although they often remain unseen, silicone pastes have a huge impact on the durability and reliability of devices. What distinguishes the universal Paste P from the enhanced Paste P12 and the specialized POWERSIL® AP? In this article, we show how selecting the right silicone paste translates into safer assembly, better protection of electronic components, and long-term operational stability. Discover why these “small” materials make such a big difference.

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      Silicone Paste Paste P12 Powersil AP Wacker Paste P

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