Boss Products boss31521 Rtv Industrial Silicone Sealant Paste White Acetic 3 Oz Tube

Product Description

The BOSS PRODUCTS boss31521 is a 100 percent RTV silicone rubber adhesive and sealant designed for industrial, commercial, and trade applications. This one-component, paste-form sealant cures to a tough, flexible, rubbery solid when exposed to ambient moisture in the air. Because it does not flow under its own weight, it can be applied overhead, on sidewalls, and on vertical joints without sagging, slumping, or running. That makes it a practical choice for HVAC techs, plumbers, electricians, and maintenance professionals who need a reliable seal in hard-to-reach or awkward positions. The boss31521 adheres to a wide range of surfaces including clean metal, glass, most types of wood, silicone resins, vulcanized silicone rubber, ceramic, natural and synthetic fiber, painted surfaces, and many plastics. This broad compatibility makes it a versatile sealant to keep on the job site or in the service van. Once fully cured, the material handles extended use at temperatures up to 400 degrees Fahrenheit, and it can be applied in sub-zero conditions without losing extrusion or physical property characteristics. The acetic acid cure system gives it strong bonding performance across both porous and non-porous substrates. With a tensile strength of 350 psi and a specific gravity of 1.007, this sealant delivers consistent, durable results in demanding environments. It resists weathering, vibration, moisture, ozone, and temperature extremes, making it well suited for HVAC duct sealing, pipe penetrations, electrical enclosures, glazing, and general maintenance repairs. The 3 oz tube format is compact and easy to handle, with a coverage area of approximately 8.4 linear feet per tube.

• One-component RTV silicone sealant that cures at room temperature when exposed to air moisture — no mixing required
• Non-sag paste formula allows overhead and sidewall application without dripping or slumping
• Rated for use from -35 to 140 degrees Fahrenheit with sustained performance up to 400 degrees Fahrenheit when fully cured

Product Highlights

The boss31521 is a dependable, all-purpose RTV silicone sealant built for industrial and trade use, offering strong adhesion to multiple substrate types, non-sag application, and proven resistance to heat, moisture, and weathering in a convenient 3 oz tube.

Product Information

Standard Information

• Brand: BOSS PRODUCTS
• Manufacturer Part Number: boss31521

Technical Specifications

• Net Content: 3 oz
• Container Type: Tube
• Form: Paste
• Color: White
• Odor/Scent: Acetic Acid
• Dry Time: 10 to 20 min
• Application Time: 5 to 10 min
• Curing Time: 24 hr
• Coverage Area: 8.4 linear ft
• Specific Gravity: 1.007
• Flash Point: Greater than 100 deg C
• VOC Content: 23 g/L
• Tensile Strength: 350 psi
• Applicable Materials: Ceramic, Clean Metal, Glass, Most Types of Wood, RTV Silicone, Vulcanized Silicone Rubber
• Temperature Rating: -35 to 140 deg F