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Conference vicki::boats

Title:	Powerboats
Notice:	Introductions 2 /Classifieds 3 / '97 Ski Season 1267
Moderator:	KWLITY::SUTER

Created:	Thu May 12 1988
Last Modified:	Wed Jun 04 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1275
Total number of notes:	18109

651.0. "Epoxy the bottom?" by BOSTON::DAGOSTINO () Tue Apr 17 1990 15:42

    Hi,
    
    It was suggested to me by my surveyor that after sanding the bottom
    I should coat it with a layer of epoxy to reduce the risk of osmosis.
    
    What type of epoxy? Should I try the Innerlux 2000? It looks like I
    don't have to resand with this. Gluv-it was also suggested but I
    will have to re-sand it again (no thanks).
    
    Help!!!
    
    Thanks
    
    Joe D.

T.R Title User Personal
Name Date Lines

651.1 some help MSCSSE::BERENS Alan Berens Tue Apr 17 1990 16:42 22

T.R	Title	User	Personal Name	Date	Lines
651.1	some help	MSCSSE::BERENS	Alan Berens	`Tue Apr 17 1990 16:42`	22
	re .0: See also note 664 in the SAILING notes conference. One coat of epoxy (regardless of manufacturer) won't be effective enough to be worthwhile. Five or more coats are required. The Gougeon Brothers (WEST epoxy) publish some inexpensive manuals on preventing and repairing blisters. System 3 epoxy is less expensive than WEST and as effective (you'll find ads for both in WoodenBoat and other magazines). There is a technique for avoiding sanding between coats that works for both WEST and System 3. Sand bottom thoroughly -- a random orbit air sander (which needs at least a 2hp compressor) works well and is reasonably fast (orbital electric sanders are horribly slow). Roll on a coat of epoxy -- two or three people applying the epoxy while a third mixes works well. You must use fast curing epoxy. Wait until the epoxy is just barely tacky. Roll on another coat. Wait. Roll. Etc. We used System 3 epoxy with the fastest hardener and were able to apply four coats to a 32' boat on a warm day (approximately 75 to 80 deg F). This is not a fun or inexpensive project.

re .0:

See also note 664 in the SAILING notes conference. One coat of epoxy 
(regardless of manufacturer) won't be effective enough to be worthwhile. 
Five or more coats are required.

The Gougeon Brothers (WEST epoxy) publish some inexpensive manuals on 
preventing and repairing blisters. System 3 epoxy is less expensive than 
WEST and as effective (you'll find ads for both in WoodenBoat and other 
magazines). 

There is a technique for avoiding sanding between coats that works for 
both WEST and System 3. Sand bottom thoroughly -- a random orbit air 
sander (which needs at least a 2hp compressor) works well and is 
reasonably fast (orbital electric sanders are horribly slow). Roll on a 
coat of epoxy -- two or three people applying the epoxy while a third 
mixes works well. You must use fast curing epoxy. Wait until the epoxy 
is just barely tacky. Roll on another coat. Wait. Roll. Etc. We used 
System 3 epoxy with the fastest hardener and were able to apply four 
coats to a 32' boat on a warm day (approximately 75 to 80 deg F). 

This is not a fun or inexpensive project.