Waterproof Neutral-Cure Silicone Sealant

We invite you to buy here and would warmly welcome your order, with our heartfelt appreciation for the confidence you place in us. AEXZR 9900 Waterproof Silicone Structural Sealant is a neutral-cure silicone for filling joints, gaps and cracks. Each tube contains 300 ml and forms a flexible, waterproof seal after curing, with a glossy finish.

Flexible Sealing Indoors And Outdoors

The cured silicone remains elastic, allowing a sealed joint to accommodate movement rather than behaving like a rigid filler. Typical applications include compatible window surrounds, door frames, tiled edges and building joints exposed to changing temperatures.

Its weather-resistant formulation is designed for exposure to rain, humidity and sunlight. The specified temperature resistance is -50°C to +150°C after curing; this is a service range, not an application temperature instruction.

The neutral curing system has a low odour. Maintain ventilation during application and follow the packaging precautions.

Prepare The Joint Before Application

Apply AEXZR 9900 Waterproof Silicone Structural Sealant to clean, dry surfaces. Remove loose debris, dust, grease and unsuitable old sealant so the new bead can contact the joint edges properly.

Check compatibility on a small area, where coatings, painted finishes or porous materials are involved. Follow any primer requirements specified for your substrate.

Dispense a continuous bead through the nozzle and smooth it according to the product instructions. Joint dimensions and preparation affect performance, so avoid treating a surface coating as a substitute for filling the joint correctly.

Allow the sealant to cure fully before exposing it to water or stressing the connection. Use the label’s curing guidance for your conditions rather than judging readiness from surface appearance alone.

Frequently Asked Questions

Which Surfaces Can It Seal?

Suitable applications include compatible glass, aluminium, metal, concrete, brick and tile joints. Confirm adhesion and compatibility for the surface finish before starting.

What Colours Are Available?

Black, clear, grey and white options are available. Select the colour suited to your joint and surrounding materials.

Is It Suitable For Outdoor Joints?

Yes. Its UV and weather resistance support outdoor sealing where the substrate and joint design are suitable.

How Long Does Curing Take?

Curing depends on bead dimensions, temperature and humidity. Follow the package instructions; a dry surface does not necessarily mean the entire bead has cured.

Can It Replace Structural Fixings?

Do not use AEXZR 9900 Waterproof Silicone Structural Sealant instead of specified mechanical fixings. Structural glazing and load-bearing joints require professional design and product-specific technical approval.