ANPIN AP-688 W451 RTV Silicone 2.6L is a white one-component room-temperature vulcanizing silicone adhesive developed for bonding, fixing, insulating and sealing electronic and electrical components. The AP-688(W451) industrial package contains approximately 3.7kg of material in a 2.6L container and is particularly suitable for PCBA production, power supplies, inverters, LED assemblies and high-volume electronic manufacturing.

Table of Contents

Product Overview

ANPIN AP-688W(451) belongs to the AP-688 series of industrial RTV silicone rubber adhesives manufactured by Shenzhen Anpin Silicone Material Co., Ltd.

The product is a one-component condensation-curing silicone rubber that begins curing after exposure to moisture in the surrounding air.

No separate hardener, catalyst or A/B mixing process is required.

During curing, the silicone undergoes condensation and cross-linking and releases small alcohol molecules as normal reaction byproducts.

After curing, ANPIN AP-688 W451 RTV Silicone 2.6L forms a flexible and durable silicone elastomer with good adhesion to metals, plastics, ceramics and materials commonly used in PCBA assemblies.

The large 2.6L / 3.7kg package is especially suitable for production lines and automatic or semi-automatic dispensing systems.

Key Features and Advantages

Fast Surface Drying

ANPIN identifies fast surface drying as one of the important characteristics of the AP-688 series.

This helps improve handling efficiency after electronic components have been fixed and can reduce waiting time during repetitive production processes.

Strong PCBA Adhesion

AP-688 provides strong adhesion to various materials used on printed circuit board assemblies.

This makes the product particularly useful for securing capacitors, inductors, transformers, transistors and other components that may be exposed to vibration or mechanical stress.

One-Part RTV Technology

ANPIN AP-688 W451 RTV Silicone 2.6L is supplied ready to use.

No weighing or mixing is required, helping simplify production and reduce operator errors compared with two-component adhesive systems.

UL94 V-0 Flame Retardancy

The AP-688 family is specified by ANPIN as conforming to UL94 V-0 flame-retardant requirements.

This characteristic is especially useful for power supplies, inverters, LED equipment and electrical assemblies where flame resistance is important.

Wide Temperature Resistance

The cured AP-688 silicone can be used continuously from approximately -50°C to +200°C.

This broad operating range allows the adhesive to protect and secure electronic components exposed to changing low and high temperatures.

Electrical Insulation

The cured silicone provides electrical insulation together with high volume resistivity.

This makes the material suitable for high-voltage electrical components and power electronics.

Moisture Protection

AP-688 provides moisture-resistant sealing around electronic components.

The cured elastomer helps reduce exposure to humidity, dust and environmental contamination.

Flexible Silicone Protection

Unlike rigid structural adhesives, cured RTV silicone remains elastic.

This flexibility helps accommodate vibration, impact and differences in thermal expansion between electronic components and surrounding substrates.

RoHS and REACH Compliance

ANPIN identifies the AP-688 family as compliant with RoHS and REACH environmental requirements.

Applications of ANPIN AP-688 W451 RTV Silicone 2.6L

PCB and PCBA Component Fixing

AP-688(W451) is suitable for securing sensitive components mounted on PCB and PCBA assemblies.

Typical components include:

Capacitors
Inductors
Transformers
Transistors
Power Components
Connectors

Power Supply Assembly

ANPIN AP-688 W451 RTV Silicone 2.6L can be used for bonding, fixing, sealing and insulating components inside AC and DC power supplies.

Inverter Components

The product is suitable for selected high-voltage components and component-fixing applications inside inverter assemblies.

LED Power Components

ANPIN identifies AP-688 as suitable for adhesive fixing of LED power components.

Lighting Equipment

The silicone can also be used for fixing components in T8 lamps and other lighting assemblies.

High-Voltage Components

The combination of insulation, moisture resistance and flame retardancy makes AP-688 suitable for selected high-voltage electrical components.

Industrial Electronics

The 2.6L / 3.7kg industrial package is particularly suitable for factories using dispensing equipment and repetitive electronic assembly processes.

Technical Information

Brand: ANPIN

Model: AP-688W(451) / AP-688(W451)

Series: AP-688

Product Type: RTV Silicone Rubber Adhesive

Capacity: 2.6L / 2600ml

Product Weight: Approx. 3.7kg

Color: White

Package Type: Industrial Bottle / Dispensing Package

Components: One-Part

Curing Type: Room-Temperature Moisture Cure

Reaction Type: Condensation Cure

Cure Byproduct: Alcohol

Material Type: Silicone Rubber

Primary Functions:
Bonding / Fixing / Electrical Insulation / Sealing

Continuous Operating Temperature:
Approx. -50°C to +200°C

Flame Retardancy:
UL94 V-0

Environmental Compliance:
RoHS / REACH

Key Properties:
Fast Surface Drying / Strong PCBA Adhesion / Electrical Insulation / Moisture Resistance / Flexible Cure / Flame Retardant

Typical Applications:
PCB / PCBA / Power Supply / Inverter / LED / Transformer / Capacitor / Inductor / Electronic Components

Important Technical Note

W451 is a specific suffix used in commercial and industrial supply records for the AP-688 family.

The ANPIN public product page provides the general technical characteristics of AP-688 but does not currently publish a separate W451 technical data table.

Therefore, exact W451-specific viscosity, density, tack-free time, Shore hardness, tensile strength and other numerical properties should be confirmed from the latest TDS or product label supplied with the actual product batch.

Why Choose ANPIN AP-688 W451 RTV Silicone 2.6L

ANPIN AP-688 W451 RTV Silicone 2.6L combines fast surface drying, strong PCBA adhesion, electrical insulation, moisture protection and UL94 V-0 flame resistance in a ready-to-use silicone system.

The cured silicone remains flexible, helping protect electronic components against vibration, mechanical stress and repeated temperature changes.

Its large 2.6L / 3.7kg industrial package is particularly useful for automated or semi-automated production lines with higher adhesive consumption.

For PCB assemblies, power supplies, inverters, LED equipment and high-voltage electronic components, AP-688(W451) provides a practical industrial RTV bonding and sealing solution.