Product for filling screw holes in fiberglass

paulspaddle · Apr 4, 2010

I'm polishing my boat for the first time. (having a heck of a time getting the oxidizing off!) I found a screw hole from what looks like a snap on rivet from the cover that was removed. Also, there are a few screw holes on the transom from hardware that must have been screwed on. All above the water line, about 1/8th inche in diameter. (deck screw diameter)

What product can I use to plug them?

Alumarine · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

3M 4200 Marine Adhesive. Available at CTC in boat section.

Ice out yet?

paulspaddle · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

Thanks....sorry, what's CTC?

Not on our lake. I just got some fish from a commercial fisherman (should I say that publicly??) They had their Bombarier on the ice last week....but no ones out there now.

I'm calling Jessica Lake Lodge (closest lake I can think of) asking about the ice there. As soon as they say its gone...I'm taking the day off!

Alumarine · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

Canadian Tire Corp.

I'm hoping it will be out in the next 2 weeks.

srimes · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

marc c said:
3M 4200 Marine Adhesive. Available at CTC in boat section.

Ice out yet?

why 4200 vs 5200? Just asking.

Summer Fun · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

What product can I use to plug them?

I'd go with 5200 if it was my boat.

paulspaddle · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

marc c said:
Canadian Tire Corp.

I'm hoping it will be out in the next 2 weeks.

CTC....Of course...:redface:

Two weeks is about my hope also.

paulspaddle · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

srimes said:
why 4200 vs 5200? Just asking.

Thanks for making me aware that there are options....if both products are there, I'll read the labels and choose.

tx1961whaler · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

paulspaddle said:
Thanks for making me aware that there are options....if both products are there, I'll read the labels and choose.

3M 5200 is twice the strength as 4200 and is considered permanent.

4200 Fast Cure: Cure Time: Tack free: 2 hrs; complete cure: 24 hrs
5200 Fast Cure: Cure Time: Tack-free: 2 hrs.; Complete cure: 24 hrs.
5200 "Regular" : Cure Time: Tack free: 48 hrs; complete cure: 5?7 days; moisture activated cure

paulspaddle · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

tx1961whaler said:
3M 5200 is twice the strength as 4200 and is considered permanent.

4200 Fast Cure: Cure Time: Tack free: 2 hrs; complete cure: 24 hrs
5200 Fast Cure: Cure Time: Tack-free: 2 hrs.; Complete cure: 24 hrs.
5200 "Regular" : Cure Time: Tack free: 48 hrs; complete cure: 5?7 days; moisture activated cure

thanks...

shep65 · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

I use Milliput for hull "dings", which is an epoxy 2 pack putty. it's very workable, and can be smoothed with a wet rag, which works well on small repairs, reducing amount of rubbing down. several colors are available inc white. I get it from ebay.

Shep65

oops! · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

the 3m 5200 will be just fine, there is also another product called marine tex.

the proper way to repair a hull hole of any kind is to mix a batch of fiberglass resin with milled fibers.(this is called peanut butter or gype) ..fill....then gellcoat paste.

lazypt · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

Interesting posts....I'm replacing my drain plug from a poly w/ 2 screw holes to a bronze with 3 mounting holes which of course don't match up. I bought resin, hardener and a syringe to fill the 2 small holes.

I'm now reconsidering because 5200 squirted into the holes will be much quicker & easier....Anyone have any thoughts on this approach?

koko1 · Apr 4, 2010

Re: Product for filling screw holes in fiberglass

lazypt said:
Interesting posts....I'm replacing my drain plug from a poly w/ 2 screw holes to a bronze with 3 mounting holes which of course don't match up. I bought resin, hardener and a syringe to fill the 2 small holes.

I'm now reconsidering because 5200 squirted into the holes will be much quicker & easier....Anyone have any thoughts on this approach?

It will work fine...I just got done moving my transducer on the transom and used it... Works great, no leaks at all..

srimes · Apr 5, 2010

Re: Product for filling screw holes in fiberglass

what do y'all think of silicone?

Capt'n Chris · Apr 5, 2010

Re: Product for filling screw holes in fiberglass

If you have no objection to obvious dirty little "5200" filled screw-holes, 3M 5200 would plug them up nicely. Its pretty bright white complexion doesn't stay bright white for very long.

Home Cookin' · Apr 5, 2010

Re: Product for filling screw holes in fiberglass

Marine tex seems to stay white.

Silicon is not a good idea below the water line. I use it above deck for stopping leaks where something is mounted to the console, etc.

paulspaddle · Apr 5, 2010

Re: Product for filling screw holes in fiberglass

I bought some 5200 today.

The boat is 20 years old...pretty minty...but still 20 years old, I'll forgive a bit of "less than perfect."

The 'to do' list before first launch is getting shorter...

Bob_VT · Apr 5, 2010

Re: Product for filling screw holes in fiberglass

Silicone really has no purpose on a boat...... it tends to fail quickly.

If you use marine tex, PC11 or even the Bondo epoxy stick thay will all work great but you can not do a gel coat repair over them.

oops had the right answer if you want to gel coat repair over the top.

oops! · Apr 5, 2010

Re: Product for filling screw holes in fiberglass

srimes said:
what do y'all think of silicone?

silicone = silly cone...

Product for filling screw holes in fiberglass

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