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Everlastic® Wide Joint Seal

The Everlastic wide joint seal is a facture cured concave strip of silicone sealant adhered to a rectangular strip of polyesther polyurethane backer. The product is designed for sealing vertical and horizontal expansion joints that measure 1-1/2” or greater.


  • Long-lasting life due to not being affected by ozone or ultraviolet rays. Has excellent stability in regards to movement capability and modules.
  • Movement capability of plus or minus 50%.
  • Aesthetics allow for larger joint design, which in return reduces stress on the bond line. This increases the chances of a successful sealant installation.
  • Primerless adhesion to a variety of substrates, including masonry and concrete. No staining.
  • Easy to install. No anchoring systems, mechanical fasteners, cutting of substrates or waiting for expansion to accrue.
  • Caulking the reveals on each of the cured sealants makes it necessary to fill to full depth – – no “cheating” on the amount of sealant placed.
  • Placed on the joint, not over as a bandage.
Typical Performance Characteristics
Test Methods Property Typical Values
Uncured Sealant
Skin Formation (Touch) Tooling Time 8-10 minutes
ASTM C879 Tack Free Time Less than 2 hours
ASTM D2202 (Full) Sag 0-0.8mm (0-0.3″)
Cure rate for 6mm (1/4″) bead at
23ºC (73ºF) +50% R.H.
Cure through 7-14 days
Cured Sealant
ASTM C661 Hardness (Shore A) 35-40
ASTM C624 Tear Strength 6.9k N/M
ASTM D412 Elongation 250%
ASTM D412 100% Modulous 1.03MPa (150 psi)
ASTM C1135
Bead 3/8″ x 1/2″, cured for 6wks @ 23ºC (73ºF) and 50% R.H. pulled at 0.05″/min
Tensile Strength 0.69 – 0.90 Mpa
ASTM C794 Peel Strength (glass, aluminum, mortar) 2.28-2.63 kN/M
13-15 pli)
ASTM C719 Movement 25%
Bead of sealant cycled @
3mm 1/8″ per hour after 28 days cure @ 23ºC (73ºF) and 50% R.H.
Movement 50%