PERMABOND 738 | Krayden

Main features

Toughened cyanoacrylate formulation is designed to provide improved impact and peel performance compared with conventional cyanoacrylates
Approximately 5,000 mPa·s viscosity and a maximum gap fill of 0.51 mm support controlled dispensing and bonding of less tightly fitted components.
The black formulation is specifically suited to dark assemblies, with documented applications including speaker assembly and black PVC wire bonding

Product Description

PERMABOND® 738 Toughened Cyanoacrylate Adhesive is a black, high-viscosity, single-component cyanoacrylate adhesive formulated to provide improved impact and peel performance compared with conventional cyanoacrylates. Its approximately 5,000 mPa·s viscosity supports controlled dispensing and gap filling up to 0.51 mm, while the black formulation is suited to dark-colored assemblies where adhesive appearance is important. PERMABOND® 738 adheres to substrates including steel, aluminum, galvanized steel, selected plastics, and elastomers. The TDS identifies speaker assembly, bonding to black substrates, and black PVC wire bonding as typical applications.

Key features

Toughened performance: Formulated for improved impact and peel strength compared with conventional cyanoacrylate adhesives.
High-viscosity gap filling: Approximately 5,000 mPa·s viscosity supports controlled application and gaps up to 0.51 mm.
Black formulation: Designed to visually match dark substrates in applications such as speaker assemblies and black PVC wire bonding.

Applications / Suitable for

Speaker assembly
Bonding to black or dark-colored substrates
Black PVC wire bonding
Steel, aluminum, and galvanized-steel bonding
Selected plastic and elastomer bonding
Assemblies requiring improved impact or peel performance

TDS, SDS & Technical Documents

Technical Specifications

General Properties

Appearance

Liquid

Color

Black

Specific Gravity

1.1

Physical Properties

Viscosity

5000 mPa.s

Curing Conditions

Fixture Time

25-30 seconds

Mechanical Properties

Impact Strength

16.8 kJ/m² mm

Electrical Properties

Dielectric Strength

10 kV/mm

Maximum gap fill

0.51 mm

Additional Information

Technical properties

As-supplied / before-processing properties

Typical uncured and curing properties reported in the supplied technical datasheet. Values are representative and should not be treated as product specifications.

Property	Value	Unit	Method / condition
Appearance	Black liquid	—	As supplied
Solids content	100	%	TDS typical value
Viscosity	5,000	mPa·s	At 25 °C; source value 5,000 cP
Specific gravity	1.1	—	Typical uncured value
Flash point	83	°C	Equivalent source value 181 °F
Maximum gap fill	0.51	mm	Equivalent source value 0.020 in
Set time — steel	25–30	s	25 °C; substrate-dependent cure-rate table
Set time — aluminum	30–35	s	25 °C; substrate-dependent cure-rate table
Set time — phenolic	5–10	s	25 °C; substrate-dependent cure-rate table
Set time — Buna rubber	10–15	s	25 °C; substrate-dependent cure-rate table
Full cure	24	h	Typical full-cure time
Shelf life	6	months	Stored at 2–7 °C