Transtar 5902-04 Med. Hardener (For 4900-01) Urethane Clearcoat (Qt) FREE SHIP $42.99 Brand Transtar Speed Medium Volume 1qt. Manufacturer Part Number 5902-04 UPC 845505000328 condition New Transtar True Finish 5902-04 Medium Hardener for Urethane Clearcoat (Quart) FREE SHIPPING!Listing is for one quart of 5902-04 Medium Hardener.True Finish Hardeners are designed to be used in True Finish Clearcoat.TEMPERATURE RANGE 75° - 90°F (24° - 32°C)