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1. Expired: WF300 Intumescent Firestop Caulk/Specified Technologies Inc./2020-04-14

   Open the PDF · HPD 10456

   HPD has expired. Expiration Date: 2022-02-13

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   Type WF300 Caulk is a latex based, high solids firestop

2. WF300 Intumescent Firestop Caulk/Specified Technologies Inc./2024-06-19

   Open the PDF · HPD 14091

   Expiration Date: 2027-06-19

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   WF300 Caulk is a latex based, high solids firestop caulk. This material, when properly installed, effectively seals penetration openings in wood frame construction against the spread of fire, smoke and combustion byproducts.