Fire performance in architectural silicone coatings has long forced a compromise between non-combustibility and processability. Elkem Silicones’ BLUESIL™ TCS 7544 is built to close that gap for coating manufacturers who need documented compliance with EN 13501-1 Euroclass A1/A2 — the highest fire classification categories within the European construction products framework.
Announced from Lyon, France, in April 2026, BLUESIL™ TCS 7544 is the latest silicone coating solution from Elkem Silicones, the silicone-manufacturing division of Elkem ASA. The material is formulated for advanced architectural textiles used in construction and public infrastructure — applications where the coating layer itself must not become a significant fuel source under fire conditions. For coating operations working to tightening European regulatory specifications, the combination of verifiable performance data and a processing-friendly formulation profile makes this worth a close look.
What Euroclass A1/A2 Actually Requires From Coated Textiles
EN 13501-1 is the European standard for fire classification of construction products and building elements. Euroclass A1 and A2 represent the two highest tiers within that system, covering products that are non-combustible or demonstrate very limited combustibility with minimal heat contribution under fire conditions.
For silicone-coated textiles deployed in public buildings, transport terminals, or large-span architectural membranes, achieving A1 or A2 means the coating layer cannot become a meaningful calorific source within the composite system. That is technically demanding because in most coated textile constructions, the coating is the primary contributor to combustibility — not the substrate. Standard fire-resistant silicone systems perform adequately in lower Euroclass bands but frequently fall short of A1/A2 thresholds without specific reformulation.
BLUESIL™ TCS 7544 — Confirmed Specifications and Performance Data
Elkem Silicones confirmed that BLUESIL™ TCS 7544 reduces heat release by approximately 20 percent compared with standard fire-resistant silicone coatings. That figure was verified through EN 1716 PCS calorimetric analysis, which measures the gross calorific potential of a material — essentially how much energy it would release under full combustion. A 20 percent reduction at that measurement level is technically significant when total calorific value must remain within Euroclass thresholds at the finished composite level.
The formulation is off-white and pigment-addable, built on two-component polyaddition chemistry. Reduced smoke emission under thermal exposure is also noted as a confirmed performance attribute, which has direct relevance to occupant evacuation safety in enclosed public spaces during a fire event.
| Property | BLUESIL™ TCS 7544 |
|---|---|
| Chemistry | Two-component polyaddition silicone |
| Mixing ratio | 10:1 |
| Viscosity | 45,000 mPa·s |
| Pot life | >24 hours at 23°C |
| Cure speed | ~3 minutes at 150°C |
| Appearance | Off-white, pigment-addable |
| Fire classification target | EN 13501-1 Euroclass A1/A2 |
| Heat release reduction | ~20% vs. standard fire-resistant silicone |
How the Formulation Performs at the Coating Line Level
The 10:1 mixing ratio simplifies metered preparation on continuous coating lines and reduces the risk of dosing inconsistency that can degrade fire performance across a production run. A viscosity of 45,000 mPa·s is optimised for pumped delivery systems and supports low coat weights — relevant because excessive coat weight increases the total calorific contribution of the coating layer and can push a composite above A2 thresholds.
Pot life exceeding 24 hours at 23°C gives operators flexibility in production scheduling without the reformulation overhead common in shorter-life reactive silicone systems. Cure at approximately three minutes at 150°C is competitive for high-throughput continuous textile coating lines, and the fast crosslinking profile supports consistent batch quality across extended production runs.
Claire Lacroix, business development manager for Textile Coating at Elkem Silicones, described BLUESIL™ TCS 7544 as combining enhanced fire safety with processing ease — framing it as a practical compliance pathway for manufacturers managing increasing regulatory expectations rather than a laboratory-grade speciality requiring significant process modification.
What This Does Not Change for Coating Manufacturers
BLUESIL™ TCS 7544 is currently available for sampling only. Commercial volume availability and confirmed supply terms were not disclosed at the time of the product announcement. Coating manufacturers will need to run their own qualification programs — including fire classification testing of finished textile composites — before this material can be written into approved construction product specifications.
The 20 percent heat release reduction is reported at the coating material level via EN 1716. Final composite fire classification will depend on substrate type, coat weight, laminate construction, and the qualification pathway required by the relevant specifying authority. Mills operating under NFPA, ASTM, or other non-European fire standards will need independent equivalence testing, as Euroclass A1/A2 compliance does not automatically translate across regulatory frameworks. No confirmed project references or approved substrate pairings were disclosed at announcement.
Who Gains Most and on What Timeline
Coating operations supplying architectural membrane fabrics, tensile roofing structures, and interior textile systems for European public infrastructure projects are the most immediate beneficiaries. The processing profile — long pot life, pumpable viscosity, fast cure — is largely compatible with existing continuous coating lines running silicone systems, which lowers adoption friction for mills already qualified in this chemistry. Brands and specifiers designing textile composites into A1/A2-regulated projects now have a silicone coating option with documented calorimetric verification from a named and recognised test method.
Silicone Coatings and the Direction of European Fire Compliance for Technical Textiles
European building product regulations have moved consistently toward stricter fire classification requirements, driven by post-incident reviews of materials used in large public buildings and façade systems. Silicone-coated textiles have expanded their share of large-span roofing, cladding membranes, and interior architectural applications — all sectors where A1/A2 compliance is increasingly a project procurement requirement rather than an optional specification upgrade.
The availability of a silicone coating that combines Euroclass A1/A2 performance with industrial processing characteristics addresses a formulation constraint that has historically made high-compliance coatings difficult to run at production scale. Elkem Silicones is presenting BLUESIL™ TCS 7544 at Techtextil Frankfurt from April 21 to 24 in Hall 11, Stand E70, where coating manufacturers can engage the technical team directly on qualification requirements and sampling logistics.
If your coating operation is working toward EN 13501-1 compliance for architectural textile composites, I’d recommend initiating sampling of BLUESIL™ TCS 7544 now. Running EN 1716 calorimetric verification against your current substrate and coat weight construction before your next project specification window opens gives you the qualification data you need before the regulatory timeline forces the decision.
Coating manufacturers that complete composite-level fire qualification early will hold a concrete technical advantage as Euroclass A1/A2 shifts from a premium specification to a standard procurement baseline across European construction textile markets.