White Lightning W21101005 Silicone Sealant 5.3 Oz Clear

Product Description

The WHITE LIGHTNING W21101005 is a clear silicone sealant packaged in a 5.3 oz tube, formulated for sealing and bonding in HVAC, plumbing, and general mechanical applications. It maintains a flexible, watertight seal across a wide operating temperature range of -80 degrees F to 450 degrees F, making it suitable for both heating and cooling system environments. Tack-free dry time is 30 minutes, with full cure achieved in 24 hours. Licensed HVAC technicians, plumbers, and general contractors use this sealant for duct sealing, pipe joints, and interior or exterior penetrations where a durable, clear finish is required.

This sealant is rated for indoor and outdoor use and is appropriate for residential and light commercial applications. Suitable application surfaces include ducts, pipes, and general interior and exterior joints. Application temperature must be between 40 degrees F and 140 degrees F for proper adhesion and cure. The clear finish blends with most surfaces and does not require painting, though this product is not paintable.

Key Features

• Wide operating range: -80 degrees F to 450 degrees F
• Tack-free in 30 minutes; full cure in 24 hours
• Clear silicone formula suitable for ducts, pipes, interior, and exterior joints
• Rated for both indoor and outdoor use
• Application temperature range: 40 degrees F to 140 degrees F
• Convenient 5.3 oz tube for controlled application

Compatibility

Designed for use on ducts, exterior surfaces, interior surfaces, and pipes in residential and commercial HVAC, plumbing, and mechanical installations.

Installation Notes

This sealant is typically applied by licensed HVAC technicians or plumbers. Shut down the system and allow surfaces to cool to within application temperature range before applying. Surfaces should be clean, dry, and free of grease or loose material for proper adhesion. Allow full 24-hour cure before returning the system to service.