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View Full Version : Hit an Unmarked Concrete Block – Repair Advice (w/ Pics)


gimmemoedmb
08-29-2013, 01:59 PM
I’ll get to what happened later, but I’m looking for some advice on what to do. I’m definitely going to get an estimate to have it done, but does this look like something I can do myself? Can I just use the spectrum gelcoat repair stuff to fill it all in or do I need to do fiberglass repair also? The other question is can I use the boat like this or should I get it repaired first? Of course it happens right before Labor Day weekend and we had planned on being out in the boat all weekend. I know that water will soak into the fiberglass and I will need to let it dry before repairing, so will too much water soak in if I use it? How long should I let it dry before making the repair?

As far as getting it professionally repaired…is Midwest MC the place to go or are there any other suggestions in the Twin Cities area? Do they do their own gel repair or send it out?

So here’s what happened…my wife and I were out on Prior Lake in MN last night. I’ve never really liked this lake all that much and we normally go to Minnetonka or the river but Prior is close to home. We decided to head back into Candy Cove because we had never been back there. There’s a small channel that leads back there with some structure right in the middle of the channel and also some no wake buoys. We enter on the right side and have no problems. On our way out I stay to the right of this structure (which would be the opposite side we entered on). As we come up to it I see that a buoy a little ahead of me and to the right is marking a rock. So I veer a little left to stay away from the rock and it puts me a little closer to this structure. I’m naturally assuming it’s deep next to this thing because it goes straight down. Then BAM. My heart drops and I go up to the front to see a huge concrete slab under the front of my boat. It had to have been about 6 feet square and 4 feet tall, sitting 8-10 inches under the water. I was fuming. I have no idea why they would mark a rock 20 feet away but a $*&#ing concrete slab is not marked. What a way to ruin a perfect night.

chriscraftmatt1976
08-29-2013, 02:09 PM
Ouch! A dealer is just going to farm it out and mark up the price. Just find a reputable glass guy. I don't think that will be a real expensive fix.

Rockman
08-29-2013, 02:10 PM
I would just do a quick repair job for the weekend activitites and worry about getting it done correctly afterwards.

Get the fiberglass sealed up as best as possible without making a bigger mess than it is already.

I would tend to have a professional do it as it is on an angle but that is just my opinion.

CruisinGA
08-29-2013, 02:15 PM
Our local glass guy would have that fixed up in no time.

Really not that bad. Don't beat yourself up over it.

park190
08-29-2013, 02:17 PM
Sorry to hear this gimme! I believe Adam is still with Midwest MC and if so does a stellar job with repairs and gel.

mikeg205
08-29-2013, 02:21 PM
No biggy at at... Do it yourself. tape of the damaged area.. get the loosened gel coat off get matching gel coat... someone just fixed theirs here... at this link

http://www.mastercraft.com/teamtalk/showthread.php?t=56807

have a friend on prior lake.. it is a goofy lake in parts.... sorry to read about the damage.

gimmemoedmb
08-29-2013, 02:26 PM
Thanks guys. I did repair some small nicks from a previous owner with the spectrum gel and it turned out real nice. I have some left over so maybe I'll at least get one layer on it to use it this weekend. Being that it was just in the water last night, is the fiberglass dry enough to do the repair today or should I let it dry out longer? I put a fan on it this morning to help speed up the dry time.

thatsmrmastercraft
08-29-2013, 02:29 PM
Hard to believe it isn't worse than that. I would do a quick repair to seal it up, then do a proper repair at the end of the season.

Buy some fiberglass resin & hardener and some white color, mask it off, mix it up and paint on a couple coats.

Get your supplies here. They are less than half the price than getting this from a marine dealer.

http://www.expresscomposites.com/

mikeg205
08-29-2013, 02:30 PM
Thanks guys. I did repair some small nicks from a previous owner with the spectrum gel and it turned out real nice. I have some left over so maybe I'll at least get one layer on it to use it this weekend. Being that it was just in the water last night, is the fiberglass dry enough to do the repair today or should I let it dry out longer? I put a fan on it this morning to help speed up the dry time.

Clean with acetone.. should be dry... there's some good vids on youtube. just be patient and make the repair are as small as possible. I had a gash in the bottom of mine - trailer too deep - doh! Here's the after...I did not ever want to see the gouge again... :D

I see a bit of glass scraped away... you may want to add a bit of glass filler.

mikeg205
08-29-2013, 02:33 PM
Hard to believe it isn't worse than that. I would do a quick repair to seal it up, then do a proper repair at the end of the season.

Buy some fiberglass resin & hardener and some white color, mask it off, mix it up and paint on a couple coats.

Get your supplies here. They are less than half the price than getting this from a marine dealer.

http://www.expresscomposites.com/

Thanks peter - another resource for the file... :)

thatsmrmastercraft
08-29-2013, 03:01 PM
Thanks peter - another resource for the file... :)

They are a great resource, and only a 10 minute drive from my house.

gimmemoedmb
08-30-2013, 09:17 AM
Hard to believe it isn't worse than that. I would do a quick repair to seal it up, then do a proper repair at the end of the season.

Buy some fiberglass resin & hardener and some white color, mask it off, mix it up and paint on a couple coats.

Get your supplies here. They are less than half the price than getting this from a marine dealer.

http://www.expresscomposites.com/

I really am surprised it wasn't worse. Which fiberglass resin is best to use? I would love to just use the the spectrum patch kit because it would be easiest, but I do feel like I should fill in the fiberglass a bit first. Does the fiberglass resin seal it so I would be able to use it this weekend? Then I could finish with the spectrum later? Turns out my old spectrum patch is dried up so I will need to order more anyway.

thatsmrmastercraft
08-30-2013, 09:22 AM
I really am surprised it wasn't worse. Which fiberglass resin is best to use? I would love to just use the the spectrum patch kit because it would be easiest, but I do feel like I should fill in the fiberglass a bit first. Does the fiberglass resin seal it so I would be able to use it this weekend? Then I could finish with the spectrum later? Turns out my old spectrum patch is dried up so I will need to order more anyway.

No problem with the fiberglass repair as a temporary measure. Be sure to put on enough to cover any damage but you don't need to overlap the edges by much. Simple to grind out at the end of the season and do a proper gel repair. First time doing gel work needs to be a slow process. Once you get then hang of it, you can do quick repairs without a problem.

gimmemoedmb
08-30-2013, 10:29 AM
Sorry, I think I'm a bit confused. My thought was I would fill in with fiberglass filler first where I lost fiberglass, then use the spectrum patch kit to finish it off. But I guess now that I think about it I won't fill the whole gouge in with filler because I didn't lose fiberglass everywhere so that wouldn't be enough to get me out this weekend. I would need to cover the whole area first.

I'm starting to think I might just do it right the first time so I don't have to go back and fix it later. Any recommendations on what fiberglass filler to use? I read on some other forum that the polyester fillers aren't good for boats but that seems to be what the local auto parts stores carry.

mikeg205
08-30-2013, 10:34 AM
Sorry, I think I'm a bit confused. My thought was I would fill in with fiberglass filler first where I lost fiberglass, then use the spectrum patch kit to finish it off. But I guess now that I think about it I won't fill the whole gouge in with filler because I didn't lose fiberglass everywhere so that wouldn't be enough to get me out this weekend. I would need to cover the whole area first.

I'm starting to think I might just do it right the first time so I don't have to go back and fix it later. Any recommendations on what fiberglass filler to use? I read on some other forum that the polyester fillers aren't good for boats but that seems to be what the local auto parts stores carry.

The polyester resins not as strong as vinyl resins... I would recommend the west systems products... or the ones Thatmrmastercraft recommends. If you have a west marine close by they usually have the product on the shelf.

thatsmrmastercraft
08-30-2013, 10:37 AM
I would talk to the folks at Express Composites for their material suggestions.

http://www.expresscomposites.com/

gimmemoedmb
08-30-2013, 10:40 AM
I think this is what I'm looking for. There are several West Marines around here so hopefully one of them has it. Thanks guys!

http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?productId=15002&catalogId=10001&langId=-1&storeId=11151&storeNum=50218&subdeptNum=50219&classNum=50220#.UiCuFD_Anps

gimmemoedmb
08-30-2013, 10:41 AM
I would talk to the folks at Express Composites for their material suggestions.

http://www.expresscomposites.com/

Or I will give them a call. I just can't make it there today so it wouldn't be until next week. Thanks for the suggestion and advice!