Caulk question

JakesRinker300 · May 2022

Hey guys. I’ve just installed my extended swim platform and when I was caulking everything I ran out. They provided a tube of Sikaflex 295uv in white. My local marine store doesn’t have any white in stock. They recommended 3m 3000 which I tried but it’s waaay to gummy. Any suggestions for any alternative to the sikaflex?

aero3113 · May 2022

Try 3M 4000 UV, I use it on all of my above the waterline projects.

JakesRinker300 · May 2022

Aero what’s the consistency of the 4000 like? The tube of 3000 I tried tonight was really gummy/stringy. When I laid down a bead and tried to smooth it out with a damp finger tip, it was really sticky/gummy. Made a real mess.

aero3113 said:

Try 3M 4000 UV, I use it on all of my above the waterline projects.

YYZRC · May 2022

I use soap when smoothing 4000.

GMSLITHO · May 2022

Swim platforms direct ? How did it line up to the back or the recessed platform

aero3113 · May 2022

@JakesRinker300 4000 isn’t gummy. When I seal, I tape off both sides of where I’m sealing then use my finger to smooth it out. Perfect line when the tape is peeled off.

JakesRinker300 · May 2022

Swim platform ultra located here in Canada. I’m not gun lie. I had to do a lot of fitting. The curved profile across the back of the boat was close but where the platform fits against the profile of the factory platform, I spent likely 6 hours just on that.

GMSLITHO said:

Swim platforms direct ? How did it line up to the back or the recessed platform

JakesRinker300 · May 2022

Black_Diamond · May 2022

That 4000 / UV4000 will get moldy.

aero3113 · May 2022

Black_Diamond said:

That 4000 / UV4000 will get moldy.

I never had an issue with mold?

TonyG13 · May 2022

aero3113 said:

Black_Diamond said:

That 4000 / UV4000 will get moldy.

I never had an issue with mold?

I've not had a mold problem, but mine has been yellowing. Has not stayed a bright white.

YYZRC · May 2022

Mine has gone all discolored and really collects dirt.

JakesRinker300 · May 2022

Oooookay so the 4000 is out? Lol

Cableguy Greg · May 2022

4200 is not UV protected and will yellow. 4000 is. I have areas that I used 4000 on and it has not yellowed. It has been in the sun for 6 years.

JakesRinker300 · May 2022

Greg in your experience with the 4000, is it gummy?

Cableguy Greg said:

4200 is not UV protected and will yellow. 4000 is. I have areas that I used 4000 on and it has not yellowed. It has been in the sun for 6 years.

Cableguy Greg · May 2022

I didn’t think it was gummy. I taped everything off, placed the caulk, smoothed with a wet finger, then removed the tape. Since it is a sealant, it is sticky.

Black_Diamond · May 2022

The 4200/4000 is really not meant to be a caulk. Made that error caulking/resetting the u-channel for my canvas. Should have used the BoatLife caulk, it won’t yellow or mold.

JakesRinker300 · May 2022

I managed to get the platform manufacturer to overnight me a tube of the 295uv white. I got the caulking finished and we’re in the water now. Thanks for all the feedback!!

JakesRinker300 · May 2022

Howdy, Stranger!

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