Fusor® 121/124 flexible foam is a two-component, urethane-based foam used for sound deadening and sealing/filling of door skins to crash bar, hood panel to supports, trunk panel to supports and gas tank filler area. Fusor 121 = 10.1 oz (300 mL) Fusor 124 = 1.7 oz (50 mL) Shelf Life Shelf life is 24 months from date of manufacture when stored at 75°F (24°C) in original, unopened container. Substrates Apply over 2K primers; urethane 2K chemistry OEM Approvals Ford, GM: Collision/warranty repair Features and Benefits Versatile – expands to ten times its size; retains memory with no shrinkage. Excellent Appearance – matches OEM sound deadening foams. Environmentally Resistant – will not absorb moisture or cause corrosion. Applications Sound deadening, sealing/filling of: door skins to crash bar, hood panel to supports, trunk panel to supports and gas tank filler area Typical Properties* Appearance Black Foam Base Chemistry Urethane Work Time 10 seconds @ 70°F (21°C) Full Expansion 3 minutes @ 70°F (21°C) Paint Time 10 minutes @ 70°F (21°C) Full Cure 1 hour @ 70°F (21°C)