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Black 10 oz cartridge of 3M 740 UV polymer adhesive sealant

3M

3M 740 UV Polymer Adhesive Sealant 10 oz Cartridge Black

SKU CH-E08B-WFE8G

A flexible, paintable polymer sealant in a 10 oz cartridge that resists ultraviolet exposure and bonds fibreglass, metal, plastic and wood

  • UV-resistant formula protects outdoor bonds
  • Flexible seal handles 300% elongation movement
  • Paintable finish matches surrounding surfaces
  • Works on fiberglass, metal, plastic and wood
  • Performs from -40 °F to 194 °F

Multipurpose UV-Resistant Sealant

3M 740 is a polymer-based adhesive sealant supplied in a 10 oz cartridge. The black formula bonds fiberglass, metal, plastic and wood for automotive, marine and general maintenance tasks. It meets ASTM C661 and ASTM D412 standards and ships new in a standard caulking-gun cartridge.

Flexible Cure With Low VOC

The sealant remains workable for 1 hour and reaches full cure in 1 day at room temperature. It stays flexible after curing with 300 percent elongation and resists ultraviolet exposure. VOC content is 22 g/L and the product is paintable once cured for finished appearance.

Wide Temperature Service Range

The cured joint performs continuously from -40 degrees F to 194 degrees F without losing adhesion or flexibility. This range suits exterior panels, roof seams and under-hood components that cycle between winter cold and engine heat. The polymer base maintains seal integrity through thermal expansion and vibration.

How it compares

Measured against everything we stock in Caulking & Sealing Supplies, at today’s prices. Recalculated every night.

Price $18.99
Typical for this category: the median of 631 items is $16.99.

Specifications

Product
Brand name3M

Questions about this item

How do I install the 3M 740 UV Polymer Adhesive Sealant from the 10 oz cartridge, and what step is commonly missed?

Load the cartridge into a standard caulking gun, cut the nozzle tip, and apply within the 1-hour working time. The step often missed is tooling the bead immediately to ensure proper adhesion before the sealant skins over.

What maintenance or replacement will the cured 3M 740 sealant need over time?

The cured sealant remains flexible with 300 percent elongation and resists ultraviolet exposure. It typically requires no maintenance unless the joint is damaged; replacement involves removing the old bead and reapplying fresh product.

What is the first performance limit the 3M 740 sealant reaches under sustained high-temperature use?

The maximum performance temperature is 194 degrees F. Sustained exposure above this limit is the first threshold where the sealant's flexible properties and adhesion can degrade.

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