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White 3M 740 polymer adhesive sealant cartridge 10 oz

3M

3M 740 UV Polymer Adhesive Sealant 10 oz Cartridge White

SKU CH-YDFV-DQJ49

Polymer adhesive sealant in a 10 oz cartridge bonds fiberglass, metal, plastic and wood with UV resistance, 300 % elongation and paintable finish

  • UV-resistant sealant protects outdoor bonds
  • Flexible 300 % elongation absorbs joint movement
  • Paintable finish matches surrounding surfaces
  • Works from -40 °F to 194 °F in all seasons
  • Low 22 g/L VOC meets strict air-quality rules

Product Identity

3M 740 is a polymer adhesive sealant supplied in a 10 oz cartridge. The white compound bonds and seals fiberglass, metal, plastic and wood in a single application. It is designed for automotive, marine and general maintenance tasks where a flexible, paintable joint is required.

Suitability

This product suits technicians and DIY users who need a multipurpose sealant that remains flexible from -40 to 194 Degrees F and resists ultraviolet exposure. It is not for buyers who require a structural adhesive with higher tensile strength, a faster full cure than one day or a non-paintable finish.

Key Specification

The 300 percent elongation at break confirms the sealant can accommodate significant joint movement without failure. This elasticity, combined with ASTM C661 and ASTM D412 compliance, determines whether the material matches the flexibility demands of the specific repair or assembly.

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 apply the 10 oz cartridge, and what step do people often miss?

Load the cartridge into a standard caulking gun, cut the nozzle to the desired bead size, and apply within the 1 hr working time. The step often missed is tooling the bead immediately after application to ensure proper adhesion and a smooth finish before the sealant skins over.

Will the cured sealant need any maintenance or replacement over time?

The sealant remains flexible with 300 percent elongation and is ultraviolet resistant, so it resists cracking and degradation from sun exposure. Under normal conditions on fiberglass, metal, plastic, or wood, it does not require routine maintenance or scheduled replacement.

What is the first performance limit reached during sustained high-temperature exposure?

The maximum performance temperature is 194 degrees F. Sustained exposure beyond this limit is the first threshold where the sealant may lose flexibility and adhesion properties, even though it meets ASTM C661 and ASTM D412 standards.

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