Repair fiberglass hull osmotic blisters
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Progressive Epoxy Polymers, Inc.
Pittsfield, NH 03263
CALL 603.435.7199
Protect your hull from osmotic blisters
We have over 40 different different epoxies for every kind of marine, home, industrial application and project. We offer more kinds and types of epoxies than any other source. We are a technical/chemical company not a sales organization. Providing epoxy help, support and products since 1990.
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Member: SSPC - Soc of Protective Coatings
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1) Open up the blister and remove the mostly heavily damaged surrounding fiberglass using a metal file bit (rasp bit) with an electric drill. As the blisters are generally filled with liquid expect a mushy mass of fiberglass dust to fill the area. Suitable protection should be taken to shield exposed skin, mouth, eyes, throat from the resulting fiberglass particles that this drilling/grinding will release.
2) Thoroughly flush the blisters with water either from a water-blaster unit or garden hose. The object is to remove any residual chemical contaminants as well as fiberglass and resin dust.
3) You may wish to repeat the grinding and washing step above until you are personally satisfied with how well you have opened each blister and removed the worst of the fiberglass damage.
4) Let the blisters dry so that all obvious loose droplets and signs of moisture have evaporated.
5) Using our thin water-displacing, two-part epoxy resin (Low V) and a paint brush vigorously rub/brush/push/swab resin into each opened blister. Work quickly, pot life is about 20 minutes. This special epoxy will displace any trapped water (literally bonding and curing underwater if necessary) and penetrate any loose or open fiberglass around the blister. Let cure overnight or longer. View Low V epoxy at epoxyproducts.com/favorites4u.html
6) Patch and fill in the blisters, as well as any other necessary boat bottom repairs, with our WET DRY 700 epoxy putty. Fill the blisters using a putty knife or plastic edger. Perform any final filling/sanding/smoothing over the blisters in preparation for applying anti-fouling paint or optional barrier coat. More info on WET DRY 700 epoxy can also be found at the link above (favorites4u.html).
There is good reason why Wet Dry 700 epoxy paste (about as thick as joint compound), Water Gard 300 barrier coat epoxy, and ESP 155 epoxy sealer are some of our the top marine selling products
"I'll stick with my original plan to use the Wet Dry 700 since it's a nuclear reactor application, and I know of two other reactors that have successfully used it" - Jeff 12/16
BARRIER COAT EPOXY LINK
The following link directs you a to web site covering more details regarding fiberglass blister repair.
BLISTER REPAIR EPOXIES
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