Apollo A300 Silicone Sealant

Overview of Apollo A300 Silicone Sealant

What is Apollo A300?

Apollo A300 is a one-component silicone sealant that cures through an acid (acetoxy) mechanism when exposed to moisture in the air. The product belongs to the premium silicone sealant line from Apollo Silicone — one of the leading brands in Vietnam for construction sealing materials.

This sealant is specially designed to bond effectively to glass surfaces, aluminum frames, plastic doors, aquariums, and other non-porous materials without the need for primer. Thanks to its good shape retention and non-slump performance after application, Apollo A300 is widely trusted for projects requiring high aesthetics.

Key Advantages of the Product

Below are the outstanding features that make Apollo A300 a best-selling sealant:

• High elasticity: After curing, the sealant becomes a flexible rubber-like layer with excellent movement capability.

• Excellent adhesion: Strong bonding to glass, plastic, and aluminum without primer.

• Easy to use: Simple application with a 45° nozzle cut, easy to control sealant flow.

• Good heat resistance: Wide operating temperature range from -50°C to +150°C, suitable for harsh weather conditions.

• Non-slump performance: Maintains shape after curing, does not deform over time.

Thanks to these features, the product is highly rated by contractors and glass installers for both quality and practical usability.

Suitable Substrates for Apollo A300

Apollo A300 performs best on the following surfaces:

• Glass and tempered glass

• Aluminum frames, windows, and doors

• uPVC and certain rigid plastics

• Aquariums and glass display cabinets

• Non-porous or properly prepared smooth surfaces

Note: Do not use on metals such as zinc, copper, or brass, as the acid-curing reaction may cause corrosion.

Common Applications of Apollo A300

Glass Bonding, Aluminum Doors, and Aquariums

Apollo A300 is commonly used as a specialized glass sealant:

• Glass-to-glass bonding: Strong adhesion at glass joints, resistant to peeling over time.

• Glass-to-aluminum bonding: Suitable for aluminum-glass doors, windows, and façade systems.

• Aquariums and small glass tanks: With waterproof capability and resistance to light water pressure, it is often used for medium and small aquarium joints.

Note: Do not use Apollo A300 for large saltwater aquariums or continuous water immersion. For such applications, use neutral silicone or aquarium-grade sealant.

Sealing Door Frames, Wood, and Plastics

Besides glass, the sealant is effective on non-porous surfaces such as:

• Door and window edges

• Interior wooden frames

• uPVC and composite materials

• Fixed joints indoors

In interior construction, Apollo A300 is often used to seal gaps, prevent dust and water ingress, and maintain aesthetic finishing.

Proper Application Guide for Apollo A300

Step 1: Surface Preparation

• Ensure surfaces are clean, dry, and free from dust, oil, and contaminants.

• For metal surfaces, lightly sand to improve adhesion.

• Apply masking tape around the joint (if necessary) to prevent smearing.

Step 2: Apply Apollo A300 Sealant

• Cut the nozzle at approximately a 45° angle.

• Apply sealant continuously with moderate pressure.

• Press gently so the sealant fully contacts and fills the joint.

• Smooth the surface with a finger or flat tool.

• Remove masking tape (if used).

Step 3: Join the Surfaces

• Position materials as required.

• Press firmly to secure the joint.

• Hold for a few minutes until surface curing begins.

Important Notes for Storage and Use

Storage Conditions Before and After Opening

• Ideal storage temperature: below 30°C, in a dry and ventilated place, away from direct sunlight.

• Avoid exposing the product to air before use, as it may cure inside the tube.

• After opening, seal the nozzle tightly with a cap or plastic wrap.

• Avoid storing near heat sources, humidity, or strong airflow, as this may affect curing.

Tip: When reusing an opened tube after several days, squeeze out the hardened portion at the nozzle before applying.

Where Apollo A300 Should Not Be Used

Although it has strong adhesion, Apollo A300 is not suitable for:

• Metals such as copper, brass, and galvanized steel (risk of corrosion)

• Continuous water immersion (large aquariums, outdoor ponds, swimming pools)

• Airtight joints where moisture cannot reach (sealant cannot cure)

• Structural load-bearing joints

• Areas requiring paint, as silicone cannot be painted

Incorrect use may lead to peeling, leakage, or aesthetic issues over time.

Shelf Life and Curing Time

• Shelf life: 12 months from manufacturing date (printed on packaging).

• Surface drying time: 5–15 minutes (depending on humidity and environment).

• Full curing time: 24–48 hours.

Note: After long storage, test a small amount for adhesion and curing before full application.

Comparison: Apollo A300 vs Apollo A500

If you need a cost-effective sealant specifically for glass, A300 is the optimal choice. If you require multi-material use and safer indoor application, A500 is a better option.

Conclusion

Apollo A300 silicone sealant is a one-component acid-cure sealant known for strong adhesion, good heat resistance, and versatile applications in glass installation, aluminum doors, and waterproof sealing. Although easy to use, proper application technique, storage conditions, and correct usage areas are essential to ensure durability. If you are looking for a high-quality, cost-effective glass sealant, Apollo A300 is a reliable choice.