EMCaulk Conductive Caulk – FLEX

EMCaulk FLEX Conductive Caulk for Electromagnetic Shielding

EMCaulk FLEX is a premium electrically conductive acrylic latex caulk engineered for RF and EMI shielding applications. It maintains electrical continuity while creating a durable, flexible, airtight, and weather-resistant seal that protects against electromagnetic leakage.

Designed for both new construction and retrofit projects, EMCaulk FLEX accommodates movement caused by expansion, contraction, and vibration without compromising conductivity. The low-odor, paintable formulation is easy to apply and cleans up with soap and water, making it ideal for commercial, industrial, government, and residential shielding projects.

Whether sealing shielding panels, conductive seams, penetrations, cable entries, or joints, EMCaulk FLEX delivers dependable long-term performance in RF shielding, EMC, TEMPEST, SCIF, and other electromagnetic protection applications.

• Electrically Conductive Caulk – Maintains electrical continuity for RF and EMI shielding applications.
• Maximum Flexibility – Advanced acrylic urethane elastomer formulation resists cracking from expansion, contraction, and vibration.
• Smooth Finish – Produces a clean, professional appearance that can be painted after curing.
• Durable Weather-Resistant Seal – Creates an airtight, water-resistant seal for interior and exterior applications.
• Easy Application – Water-based formula with soap-and-water cleanup.
• Versatile Performance – Ideal for shielding seams, penetrations, joints, and conductive assemblies.
• Interior & Exterior Use – Designed for reliable conductive sealing in both indoor and outdoor applications.
• Paintable Finish – Can be painted after curing for a clean, professional appearance.

• Formula: FLEX (4FS032)
• Vehicle: Urethane / Modified Acrylic Blend (Siliconized)
• Pigment: Dark Gray
• Solids Content: Approximately 80%
• Coverage: Approximately 54 linear ft per 10.1 fl oz cartridge using a 3/16 in bead
• Application Temperature: 40°F to 95°F (substrate temperature not to exceed 140°F)
• Service Temperature: -40°F to 180°F
• Freeze-Thaw Stability: Five cycles at 0°F
• Tooling Time: 10–15 minutes
• Tack-Free Time: Approximately 60 minutes
• Paint Over: 4–6 hours
• Full Cure: 7–14 days
• Shelf Life: 24 months when stored between 50°F and 80°F
• Odor: Mild Sweet Acrylic
• Specific Gravity: 2.0 ± 0.5
• Weight per Gallon: 16.7 ± 0.5 lb
• Flash Point: None

EMCaulk FLEX is designed for projects that require both electrical conductivity and long-term flexibility. Typical applications include:

• RF shielded rooms and enclosures
• SCIF construction and secure government facilities
• TEMPEST shielding systems
• EMC and EMI testing laboratories
• Data centers and telecommunications facilities
• Shielded equipment rooms
• Medical imaging and healthcare facilities
• Broadcast and communication sites
• Industrial electronics manufacturing
• New construction and retrofit RF shielding projects

The flexible formulation is ideal for sealing joints, seams, penetrations, cable entries, conduit openings, shielding panels, and other conductive interfaces where electrical continuity must be maintained.

EMCaulk CPC-432 FLEX Technical Data

EMCaulk CPC-432 FLEX Safety Data