Loctite LOC59375 Black Rtv Silicone Sealant

Product Description

The LOCTITE LOC59375 is a black RTV silicone adhesive sealant designed for sealing, bonding, and gasketing applications across HVAC, plumbing, and general mechanical systems. RTV (room temperature vulcanizing) silicone cures on exposure to moisture in the air, forming a flexible, durable seal that resists vibration, temperature cycling, and fluid exposure. This product is sold as a single unit and is suited for use by HVAC technicians, plumbers, and mechanical contractors who need a reliable, flexible sealant for metal-to-metal, metal-to-glass, and similar substrate joints.

This black silicone sealant is commonly used in residential and light commercial applications including duct sealing, equipment housing gaskets, drain pan repairs, and accessory mounting. Its black color makes it appropriate for visible joints where aesthetics matter or where high-heat environments such as flue surrounds or exhaust components require a dark finish. Technicians apply it when a compressible, waterproof seal is needed that can flex with thermal expansion and contraction over time.

Key Features

• Black RTV silicone formula cures at room temperature without heat or special equipment
• Flexible cure resists cracking from vibration and thermal cycling
• Adheres to metal, glass, ceramic, and most plastics
• Waterproof seal suitable for drain, condensate, and moisture-exposed joints
• Sold individually, minimum order quantity of 10 units

Compatibility

Designed as a general-purpose RTV silicone sealant for use in HVAC, plumbing, and mechanical assembly applications where a flexible, moisture-resistant bond is required.

Installation Notes

Application should be made to clean, dry, oil-free surfaces for proper adhesion. Allow full cure time before exposing the joint to fluids or pressure. When used in HVAC or mechanical systems, follow applicable codes and manufacturer guidelines for sealant use on pressurized or gas-adjacent components. Wear appropriate PPE and ensure adequate ventilation during application, as acetic acid off-gassing is typical during RTV cure.

Technical Specifications

• Color: Black
• Type: RTV Silicone Adhesive Sealant
• Unit of Measure: Each
• Minimum Order Quantity: 10
• UPC: 079340593756

Standard Information

• Brand: LOCTITE
• Manufacturer Part Number: LOC59375