AV Dec HI-Tak Tape

Av-Dec pre-cured polyurethane tape sealant has a fiberglass carrier providing two sided sealing. It is designed for sealing and moisture-proofing between irregular surfaces. This product works best when applied under compression between two surfaces. This product is also available die cut in gasket form and in flame retardant (FR).

What Is AV Dec HI-Tak Tape Used For?

AV Dec HI-Tak Tape is designed to seal and prevent moisture intrusion between irregular aircraft surfaces. It is commonly used under floorboards and structural panels where compression sealing is required. The polyurethane construction creates a positive moisture barrier while allowing clean removal without residue.

What Are the Key Features of HI-TAK Tape HT-3935-7?

• Provides a high level of tack to most substrates
• Ease of installation and removal
• Leaves no residue when removed
• Consistent, easy installation
• Polyurethane material
• Replaces moisture-retaining products under floorboards

What Benefits Does AV Dec HI-Tak Tape Provide?

• Corrosion protection and improved structural reliability
• Reduction in return-to-service time and labor costs
• No solvents required and no scraping required
• No paint adhesion issues
• Available in roll form or die cut for specific applications
• Assures proper sealing with 100% surface contact
• Non-hazardous with no silicone oil residue
• Positive moisture barrier with vibration and noise dampening

What Thickness Options Are Available?

• 0.025" Reduced (HT3935RT-XXX)
• 0.045" Nominal
• 0.080" Extra (HT3935ET-XXX)

Technical Specifications

Part Number Series	HT3935-7-XXX (where XXX = width in hundredths of an inch)
Color	Plum
Dielectric Withstand Voltage	>400 volts/mil
Shelf Life	Indefinite (in original packaging)
Weight	0.71 g/sq in
Solvent Resistance	ASTM D-543 (Water, Polypropylene Glycol/Water, Skydrol LD-4, MIL-H-5606, Jet A) – No degradation of physical properties
Test Data	3000+ Salt Spray Test (ASTM B117), Flammability (FAR25.853a Method 2) for FR version
Reactivity to Polyethylene and Aluminum	None – Product supplied fully cured
Service Temperature Guide	-65°C to 135°C (-85°F to 275°F) Continuous

Available AV Dec HI-Tak Tape Part Numbers and NSNs

AV Dec PN	NSN	Description	Aircraft Applications
HT3935-7-050	5999-01-531-3540	0.50" x 12' Roll	All Air Frames
HT3935-7-075	8030-01-535-6816	0.75" x 12' Roll	All Air Frames
HT3935-7-100	8030-01-494-5206	1.0" x 12' Roll	All Air Frames
HT3935-7-150	8030-01-494-5209	1.5" x 12' Roll	All Air Frames
HT3935-7-200	8030-01-494-5207	2.0" x 12' Roll	All Air Frames
HT3935-7-250	8030-01-494-4136	2.5" x 12' Roll	All Air Frames

For current pricing on all sizes, contact sales@customtapes.com.