LOCTITE® SI 595 Superflex® Clear RTV Silicone Adhesive Sealant – Acetoxy Cure for General-Purpose Sealing
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$ 5.99 USD
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LOCTITE® SI 595, also known as LOCTITE® Superflex® Clear RTV Silicone, is a one-component, room-temperature-vulcanizing (RTV) acetoxy silicone sealant. It cures on exposure to moisture in the air to form a tough, flexible silicone rubber seal that resists aging, weathering, and thermal cycling without hardening, shrinking, or cracking.
Key Features
- One-component acetoxy silicone; no mixing required
- Thixotropic, non-slumping paste holds its shape on vertical surfaces
- Cures to a flexible, durable rubber seal at room temperature
- Resists weathering, thermal cycling, UV light, and ozone
- NSF/ANSI 51 certified for food-equipment applications up to 204°C (400°F); recognized by UL for Plastics & Components
Common Uses
- General-purpose sealing of ductwork, vents, flues, doors, and windows
- Electrical insulation and protection of leads from mechanical shock
- Trim bonding and mechanical assembly sealing
- Gasketing and sealing on metal, glass, ceramic, and most plastics (not recommended for concrete)
How to Use
- Clean and dry surfaces; remove all oil and grease.
- Apply product to the surface. For bonding applications, apply to one surface only and join surfaces immediately.
- Wipe away excess material immediately.
- Allow approximately 45 minutes to reach tack-free/surface cure; allow 24 hours for full cure.
Product Specifications
| Brand | Loctite |
|---|---|
| Also Known As | Superflex® Clear RTV Silicone |
| Technology | Silicone (acetoxy) |
| Components | One component, no mixing |
| Cure Type | Room temperature vulcanizing (RTV), moisture cure |
| Appearance (uncured) | Clear, thixotropic paste |
| Odor | Acetic acid |
| Specific Gravity | 1.01 @ 25°C (77°F) |
| Tack-Free Time | ≤45 minutes |
| Full Cure | 24 hours |
| Tensile Strength (cured, 1 wk @ RT) | ≥0.8 N/mm² (≥120 psi) |
| Elongation (cured) | ≥275% |
| Shore A Hardness (cured) | ≥14 |
| Flash Point | >93°C (>199°F) |
| VOC Content | 3.0%; 30 g/L |
| Storage | 8°C to 21°C (46°F to 70°F); avoid below 8°C or above 28°C (82°F) |
| Certifications | NSF/ANSI 51 (food equipment, plastics, ≤204°C); UL Recognized (Plastics & Components) |
| Item Numbers | 80 mL Tube – 37463; 190 mL Aerosol Can – 743915; 300 mL Cartridge – 193999 |
Important Limitations
Not recommended for use on concrete, in pure oxygen or oxygen-rich systems, or as a sealant for chlorine or other strong oxidizing materials. When heated above 300°F (150°C) in the presence of air, silicones can form formaldehyde vapor; use with adequate ventilation. Per the current SDS, this product is not classified as a DOT/GHS transport hazard and is not regulated for ground, air, or water shipment. No California Proposition 65 listed chemicals are known to be present.