Join Date: Oct 2009
Location: Swarthmore, PA
Thanked 98 Times in 87 Posts
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DO NOT use your finger if you're using polyurethane sealant. Isocyanates are very dangerous. You might do OK with it for while, but over time you could build up a sensitivity that causes a severe allergic reaction (rash all over your body, respiratory distress, etc.). Yes, it could happen from just getting your finger exposed.
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2001 Catalina 34MkII Breakin' Away (at Rock Hall Landing Marina)
PO of 1998 Catalina 250WK Take Five (new owners relocated to Baltimore's Inner Harbor)
1991 17' Trophy (Lake Wallenpaupack)
1985 14' Phantom (Lake Wallenpaupack)