Skygeek View Cart SkyGeek Facebook SkyGeek Twitter SkyGeek Blog SkyGeek YouTube View All Brands Best Sellers New Arrivals Skygeek View Cart
Dow Corning 3140 RTV Silicone Sealant

Dow Corning 3140 RTV Silicone Sealant

If your aircraft didn't roll off the assembly line yesterday, you're probably starting to deal with loose or cracked seals, deteriorated wiring or other issues that need to be patched up ASAP. Thankfully, there's plenty of help in neat and tidy little tubes. Dow Corning® 3140 RTV Silicone Sealant is one way to get your plane from former glory to forward progress.

Dow Corning® 3140 RTV adheres to several surfaces as it is specially formulated to bond with reactive metals, ceramics and plastics. Adhesion is also possible on certain plastics, resins, and laminates. While not initially designed to affix well to non-reactive surfaces such as Teflon, its bonding can work well if special treatments (chemical etching; plasma treatment) are applied.

Another reason to 3140 RTV coat with confidence: it has excellent flowability and cures at room temperature. You know what that means? No need for a curing oven and the costs to run one. There's also no mixing required, either; just squeeze it out of the tube, apply and wait. It's even UL 94V-1, IPC-CC-830 and MIL-A-46146 tested so you can trust its effectiveness as it has overcome such rigorous standards. More features and specifications are awaiting your attention below.


  • US Military Specification: MIL-A-46146B, Amend 3, Group 1, Type II.
  • Features
  • Good flowability
  • Room temp cure No added solvents
  • UV indicator for inspection
  • UL 94V-1, IPC-CC-830 and MIL-A-46146 tested
  • No mixing required
  • RT cure, no ovens required
  • Faster in-line processing with optional heat acceleration
  • Able to flow, fill or self-leveling after dispensing
  • UV indicator allows for automated inspection
  • Can be considered for uses requiring added flame resistance, IPC or MIL Spec testing
  • Specifications
  • Viscosity: cP 35950, mPa-sec 35950, Pa-sec 36
  • Specific Gravity (Cured): 1.04
  • NVC (Non Volatile Content): 95.6%
  • Tack-Free Time at 25°C: 105 minutes
  • Tensile Strength: 445 psi, 3 MPa, 31 kg/cm2
  • Tensile Modulus: 100 psi, 0.7 MPa, 7 kg/cm2
  • Durometer Shore A: 34
  • Unprimed Adhesion - 180 Degree: 41 ppi
  • Peel Strength: 23 N/cm2
  • Shelf Life at 25°C: 12 months
  • Agency Listing: IPC-CC-830B, UL 746E
  • UL Flammability Classification: 94 V-1
  • MIL Specification: MIL-I-46058C, 46146
  • View DetailsEnable JS
    Part Number
    3 oz Tube
    Hover for Qty Pricing
    Same Day Ship
    Material Safety Data Sheet:
    View DetailsEnable JS
    Part Number
    493 Gram Can
    Hover for Qty Pricing
    Material Safety Data Sheet:
    Related Products
    NewsletterKeep Up-to-Date with SkyGeekStore InfoCustomer Care
    Sign Up For Our Newsletter

    © 2016. has Aircraft Oil, Aircraft Tools, and more for all your aviation supply needs.
    Secure Shopping
    Shopper Award has a Shopper Approved rating of 4.7/5 based on 28467 ratings and reviews