In environmental sealing for outdoor equipment such as outdoor lighting, HVAC, and electrical control cabinets, as well as impact resistance and thermal protection for electronic devices and vehicle interiors, the four-dimensional performance of "compressibility — stress relaxation — weather durability — flame retardant safety" of sealing gasket materials has always been the core contradiction restricting equipment protection life and reliability. Traditional EPDM sponge, while soft, ages and hardens rapidly under UV, ozone, and high-low temperature cycling, with sharply increased compression set leading to sealing failure and rising maintenance costs; solid silicone rubber, despite excellent weather resistance, has high hardness and requires large closing force, making light-force sealing difficult and unable to adapt to irregular gaps; ordinary polyurethane foam has poor flame retardancy, dripping and releasing toxic smoke when exposed to fire, failing to meet safety codes. With the continuous upgrading of miniaturization, lightweight, and high protection level (above IP65) demands for outdoor equipment, sourcing a "highly compressible, low compression set, UL94 V-0 flame retardant, high-low temperature resistant" flexible sealing material has become the core gap for domestic high-end silicone foam autonomy. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. officially launches IOTA 870 Soft Silicone Foam. Characterized by "black and red color options; thickness 1.6-12.7mm, standard width 914mm; density 240kg/m³; force deflection 27.6kPa (@25% deflection); compression set <1% (70℃) / <5% (100℃); tensile strength 207kPa, elongation 90%; flame retardant UL 94 V-0 and HF-1; flame spread index <25, smoke density <50 (4min) / <20 (1.5min); available with single or double-sided pressure-sensitive adhesive", backed by "microcellular elastomer structure + low stress relaxation formula + flame retardant synergistic system", it serves as the "flexible gasket" for outdoor equipment sealing and electronics cushioning, achieving the leap from "traditional sponge aging and hardening failure" to "silicone foam持久 flexible elastic sealing". System Positioning: Silicone Foam vs. Traditional EPDM Sponge and Solid Silicone Rubber IOTA 870 belongs to the silicone foam (cellular silicone rubber) system, distinct from traditional EPDM sponge and solid silicone rubber. EPDM sponge relies on carbon-chain elasticity; its molecular chains break under UV, ozone, and high temperature, causing irreversible compression set increase and gasket failure. Solid silicone rubber has high crosslinking density and hardness, requiring larger closing force for the same sealing level, unsuitable for precision equipment or lightweight structures. Silicone foam builds a uniform microcellular structure in the silicone rubber matrix through precision foaming, inheriting silicone's inherent high-low temperature resistance, UV and ozone resistance, while possessing the low compression force and high compressibility of foam materials, thoroughly avoiding the application shortcomings of traditional materials: aging hardening and excessive closing force. Molecular Architecture: Microcellular Elastomer + Low Stress Relaxation + Flame Retardant Synergy The core competitiveness of IOTA 870 stems from its precision foaming and formulation synergy:

• Microcellular Elastomer Achieves High Compressibility: Uniformly distributed microcells reduce density to 240kg/m³, requiring only 27.6kPa force deflection at 25% deflection, enabling designers to achieve sealing with minimal force. High compressibility perfectly adapts to different gap widths and complex irregular cross-sections, greatly enhancing design flexibility.
• Low Stress Relaxation Formula Ensures Persistent Sealing: Optimized silicone rubber molecular network and crosslinking density result in compression set <1% at 70℃ and <5% at 100℃, with minimal stress relaxation. It maintains excellent resilience after long-term compression, fundamentally reducing gasket failure from large compression deformation and softening, drastically cutting maintenance costs.
• Flame Retardant Synergistic System Passes V-0: A halogen-free flame retardant system synergizes with the silicone base, forming a dense ceramicized carbon layer when exposed to fire. Flame spread index <25 and extremely low smoke density (4min <50, 1.5min <20) easily pass UL 94 V-0 and HF-1, providing passive fire protection and low-smoke safety for outdoor equipment.

Performance Leap: From "Aging Hardening" to "Persistent Flexible Flame-Retardant" Introducing IOTA 870 brings a qualitative leap to outdoor sealing and electronics cushioning:

• High Compressibility for Complex Gaps: Excellent softness easily compresses to fill irregular gaps, providing dust-proof, moisture-proof, air-tight or light-shielding environmental sealing for lighting, HVAC, and electrical cabinets.
• Extremely Low Compression Set and Lasting Resilience: <1% compression set at 70℃ ensures no softening or collapse during long-term service, greatly extending sealing life.
• Comprehensive Weather Resistance Against UV and Ozone: Silicone base naturally resists high-low temperature, UV, and ozone, maintaining stable performance in harsh outdoor environments without cracking or powdering.
• UL 94 V-0/HF-1 Dual Flame Retardancy: Meets stringent fire safety requirements for outdoor and electronic equipment, with excellent flame spread and smoke density indicators, ensuring personnel and equipment safety.
• Easy Processing and Convenient Installation: Available in rolls of different thicknesses, easily die-cut into required sizes; optional single or double-sided pressure-sensitive adhesive for convenient bonding to various surfaces, improving assembly efficiency.

Application Penetration: From Outdoor Lighting to Vehicle Interior Cushioning The application boundary covers all scenarios requiring "light-force sealing + weather resistance + impact buffering":

• Outdoor Equipment Environmental Sealing (Main Battlefield): Dust-proof, moisture-proof, air-tight or light-shielding seals for lighting fixtures, HVAC equipment, and electrical control cabinets.
• Electronics Equipment Cushioning Gaskets: Internal buffer pads and gaskets providing impact resistance and thermal protection for electronic components, isolating vibration.
• Vehicle Interior Applications: Sealing and cushioning gaskets inside automobiles, rail transit, etc., temperature-resistant, weather-resistant, and flame-retardant.

IOTA Technical Guide: PSA Bonding, Easy Die-Cutting

• Application: Select appropriate thickness (1.6-12.7mm) according to gap width; rolls can be die-cut into required shapes; single or double-sided PSA versions are recommended for direct application on clean, dry surfaces.
• ⚠️ Taboo: Ensure bonding surfaces are free of oil, dust, and mold release agents before installation to avoid affecting PSA strength; avoid puncturing the foam surface with sharp objects to prevent damaging sealing integrity.
• Storage: Store in a cool, dry place, avoiding direct sunlight and heavy pressure deformation; standard width 914mm rolls for convenient warehousing and transportation.
• Handling: Black and red color options available; wide thickness range adapts to different design gaps; low density and light weight suitable for lightweight sealing of large equipment.

Industry Insight: In high-end sealing gasket materials, the molecular architecture of silicone foam — "microcellular elastomer + low stress relaxation + flame retardant synergy" — is the key path to achieving the trinity of "light-force sealing, persistent resilience, weather-resistant flame retardancy" — microcellular foaming technology solves the application pain point of solid silicone "high hardness, large closing force demand", while the introduction of silicone base ends the industry shortcoming of EPDM sponge: "easy aging, large compression set". IOTA 870, with "soft silicone foam + compression set <1% + UL 94 V-0/HF-1 + density 240kg/m³ + optional PSA" hard metrics, fills the key supply chain link for domestic silicone foam in outdoor equipment sealing and electronics cushioning, providing a mass-producible high-performance solution for downstream lighting, HVAC, and electronics enterprises. This confirms domestic sealing materials are leaping toward "EPDM sponge → solid silicone rubber → silicone foam", with growing technical say in high-end equipment protection fields.