We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
White 3M 740 polymer adhesive sealant in a 20 oz sausage pack

3M

3M 740 UV Polymer Adhesive Sealant 20 oz Sausage Pack White

SKU CH-KA7B-65B8G

White polymer adhesive sealant in a 20 oz sausage pack, UV resistant and paintable with 300 percent elongation for fiberglass, metal, plastic and wood

  • UV-resistant polymer sealant protects exterior joints from sun damage
  • Paintable finish lets you match any surface colour after curing
  • Flexible 300 % elongation absorbs joint movement without cracking
  • Works from –40 °F to 194 °F for year-round reliability
  • Low 22 g/L VOC content meets strict indoor-air-quality standards

Multipurpose UV-Resistant Sealant

3M 740 is a white polymer adhesive sealant supplied in a 20 oz sausage pack. It bonds fiberglass, metal, plastic and wood while remaining flexible after a one-day cure. The formulation resists ultraviolet exposure and meets ASTM C661 and ASTM D412 standards.

Suitable for general repairs and assembly

Painters and fabricators needing a paintable joint that withstands -40 to 194 Degrees F will find this sealant fit for purpose. Buyers who require a faster skin-over time than the one-hour working window or a non-paintable finish should consider other chemistries.

One-day full cure at room temperature

The sealant reaches full cure in 1 day, delivering 300 percent elongation and a VOC content of 22 g/L. This cure schedule determines whether the application timeline matches your production or repair cycle.

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

What type of caulking gun or dispenser is required for the 20 oz sausage pack?

Use a standard sausage-pack applicator gun sized for 20 oz foil packs; a regular cartridge gun will not accept the flexible sleeve.

What surface-preparation step is most often skipped before applying 3M 740?

Clean all substrates until dry and free of oil, dust or old sealant; the polymer base will not bond to contaminated fiberglass, metal, plastic or wood.

When will a fully cured bead need to be replaced under continuous outdoor exposure?

The ultraviolet-resistant formula remains flexible from -40 °F to 194 °F with 300 % elongation, so plan on inspection after several years of service rather than a fixed interval.

More in Caulking & Sealing Supplies

Similar items