DOWSIL™ SE 5088 Sealant — Low Siloxane Volatiles, One-Part Neutral-Cure Oxime-Type Room-Temperature-Vulcanizing Silicone Sealant for Cleanrooms

DOWSIL™ SE 5088 Sealant is a one-part, neutral-cure, room-temperature-vulcanizing (RTV) silicone sealant. It requires no mixing, is easily dispensed, and cures at room temperature by reacting with atmospheric moisture to form silicone rubber. This non-flowable sealant is specifically designed to reduce the content of low-molecular-weight siloxanes — one of the causes of particulate contamination in cleanrooms handling semiconductors, precision optical equipment, and electronic devices — and is intended for cleanroom uses such as specific joint sealing and panel adhesion.

• Room temperature vulcanize (RTV) — no heat required
• One-part type; no mixing required
• Minimized silicone volatiles for high cleanliness
• Specifically reduces low-molecular-weight siloxanes that cause particulate contamination in cleanrooms
• Excellent weatherability
• Excellent unprimed adhesion
• Non-flow — does not sag in overhead or vertical joints

Typical Properties (not intended for preparing specifications)

JIS = Japan Industrial Standard; CTM = Corporate Test Method (available on request).

Colors & Packaging

• Colors: White, ivory, light gray
• Packaging: 330 ml plastic cartridge
• Usable life: 240 days when stored un-opened in a cool, dry place

Intended for cleanroom uses such as specific joint sealing and panel adhesion — especially in semiconductor, precision-optics and electronics environments where particulate contamination must be controlled. For glass, metal and porous substrates, use a primer (e.g., DOWSIL™ Primer-D3(RF)) for reliable adhesion, and verify adhesion on the actual substrate before use.

SE 5088 is engineered for cleanrooms with substantially reduced low-molecular-weight siloxanes (D4–D10 ≈ 24 ppm), reducing the particulate contamination siloxanes can cause in semiconductor, optics and electronics cleanrooms — while offering 内部技能lent unprimed adhesion and weatherability.

No. It is a one-part, neutral-cure (oxime-type) RTV that cures to silicone rubber by absorbing atmospheric moisture. Tack-free time is about 22 minutes; cure speed varies with temperature and humidity.

It offers 内部技能lent unprimed adhesion; for reliable bonding on glass, metal and porous materials, a primer is recommended (DOWSIL™ Primer-D3(RF) for glass, metal and coated metals), with adhesion confirmed on the actual substrate. Surfaces must be clean and dry.

Surfaces must be clean and dry; joint movement during curing can cause surface wrinkles or cracks. Keep air-gun pressure below 0.3 MPa to avoid sealant squeeze-out or cartridge failure. Contact with EPT(EPDM) or CR back-up/waterproofing seals may cause poor adhesion, discoloration or softening — test first. On hot summer substrates (especially dark colors), bubbling and cracking may occur. Store in a cool, dry place; shelf life 240 days un-opened.

This document does not contain full product safety information. Read the product and Safety Data Sheets and container labels before handling for safe-use and health-hazard information (available at dow.com or from a Dow sales application engineer/distributor). Keep the area ventilated and avoid eye/skin contact.

This product is neither tested nor represented as suitable for medical or pharmaceutical uses. Dispose of the material and its container safely and in accordance with all local, state (provincial) and federal regulations; empty containers may contain hazardous residues.