Choosing the Right Sealant for your Application: A Guide for Industrial & Commercial Buyers

Choosing the right sealant is essential in industrial and commercial applications where durability, safety, and environmental performance are critical. At Bulk55, we stock high-quality sealants engineered for specific industrial functions - from high-heat resistance to chemical durability. This guide outlines which sealant to choose based on your use case, with direct links to our in-stock products.

DOWSIL™ 732 Multi-Purpose Silicone Sealant

View product – 10.1 oz, Aluminum (48 count)
View product – 4.7 oz, Clear (48 count)
View product – 3 oz, Clear (48 count)

Best for:

• HVAC system sealing

• Electrical and machinery enclosures

• General-purpose industrial sealing

Key Features:

• Withstands extreme temperatures (-60°C to 180°C)

• Bonds well to metals, glass, ceramics, and plastics

• FDA-compliant (177.2600) and MIL-A-46106 qualified

• Excellent for both indoor and outdoor use

Available Variants:

• Clear (3 oz)

• Clear (10.1 oz)

• Aluminum (10.1 oz)

• Black (10.1 oz)
  

• All colors

DOWSIL™ 736 High-Temperature RTV Silicone Sealant

View product collection

Best for:

• Industrial ovens and furnaces

• Exhaust flanges and ducts

• Equipment exposed to high thermal cycling

Key Features:

• High-temperature resistance up to 260°C (500°F)

• Non-sag formula ideal for vertical applications

• Excellent adhesion to a variety of metals and substrates

Available Sizes:

• 3 oz

• 10.1 oz

Loctite® Oil & Gas Resistant Adhesive Sealant

View product – 1 oz tubes (6-pack)

Best for:

• Fuel and oil system sealing

• Marine engine gaskets

• Automotive repair applications

Key Features:

• Excellent resistance to oil, gas, and industrial fluids

• Fast-drying and remains flexible

• Bonds to rubber, metal, plastic, and more

• Clear finish for low-visibility applications

This sealant is specifically designed for environments with consistent petroleum exposure or vibration stress.

Loctite® 518 Red Gasket Maker Flange Sealant

View product – 1.69 oz tubes (6-pack)

Best for:

• Sealing close-fitting metal flanges

• Gearboxes, compressors, and pump housings

• OEM-grade repairs and overhauls

Key Features:

• Anaerobic curing (hardens between tight metal surfaces)

• Fills gaps up to 0.009 in (0.25 mm)

• High resistance to automotive fluids

• Rated for temperatures up to 300°F

Perfect for replacing conventional paper or rubber gaskets while improving reliability and fluid control.

Sealant Selection Summary

Need Help Choosing?

At Bulk55, we specialize in industrial-grade solutions at commercial volumes. Whether you're sourcing sealants for HVAC maintenance, automotive assembly, or high-heat manufacturing, our in-stock products are ready to ship in bulk.

Browse our DOWSIL brand hub, or contact us for custom spec matching and volume pricing.