A little caulking trick...

Discussion in 'General Maintenance/Repair Questions' started by tobnpr, Sep 4, 2008.

  1. tobnpr

    tobnpr New Member

    Nov 12, 2006
    New Port Richey, Florida
    1988 300 DA
    tw 350's w/ Alphas
    I'm sure someone else has already figured this out before me, but I've discovered that the reuseable syringes I've used for injecting epoxy work great when filled with caulking when I need to lay down a super thin bead without masking or tooling, and for getting into tight spaces where you can't fit a normal caulk gun. FYI...

    Weave and Nehalennia like this.
  2. Nehalennia

    Nehalennia Well-Known Member

    Aug 22, 2007
    Marysville, WA
    2001 310DA twin 350 MAGs, Westerbeke 4.5KW
    Twin 350 MAG V-drives
    ...good one, green ball for you.
  3. 330DA

    330DA Member

    Oct 12, 2006
    New Buffalo, MI
    2000 310 Sundancer, Brig 330 RIB
    350 MPIs, V-Drives
    Great idea. Thanks.
  4. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Twin 7.4l
    If you have the space for a large caulk gun, you can obtain 1/16" to 1/8" caulk lines with these couple items in mind....

    1. Cut the tip at a 45 degree angle

    2. Only cut the very very very small end off the tip. This will keep the caulk line very uniform and thin.

    3. Keep constant pressure on the trigger and slowly move the gun.

    4. Wet your finger prior to smoothing out the caulk. If you cut the tip small enough, you don't even have to tape to keep a uniform joint.

    Try it, you'll be surprised how easy caulking can be.

  5. JAFI

    JAFI New Member

    Aug 11, 2008
    Gunpowder Cove, MD
    330 Sundancer
    8.1 S Horizon DTS
    Here's another little trick for you when working with silicone caulk.

    When you want to smooth out a silicone caulk joint like you can with latex. Use Denatured Alcohol in a spray bottle like you would water with latex.

    You can use blue tape to have clean edges, just spray the silicone with the denatured alcohol and use your finger to smooth it out for a perfect finish every time.

    I've used this technique using tub and tile mildew resistant silicone in bathroom installs for quite some time.
    Against The Wind likes this.
  6. RiverRat

    RiverRat New Member

    Apr 1, 2007
    Creve Coeur, MO
    03 280 Sundancer
    Kohler 5 KW Gen.
    95 13' Boston Whaler Dauntless
    Twin 4.3 MPI
    Alpha 1 Gen 2
    Will the alcohol effect the gelcoat in any way?
  7. garryowen

    garryowen New Member

    Mar 3, 2008
    colorado river
    230 weekender-

    -310 sundancer
    454 Mercruiser w/Bravo III-

    -twin 7.4 mfi w/Bravo III's
    other than clean it no. alcohol wont hurt the gelcoat
  8. EKM

    EKM Member

    Feb 4, 2007
    Beach Haven, NJ
    2000 420AC
    Cummins 6CTA
    You can also use Windex to smooth out the caulking line....works great. Apply caulk, wet the area with Windex, smooth out with appropriate device. Just recaulked the rub rail with Boatcaulk and it worked great.
    Try it....
    mrsrobinson and Newbie like this.
  9. mrsrobinson

    mrsrobinson Well-Known Member

    Mar 9, 2006
    Richmond, Virginia
    2006 Monterey 302 - Sold
    2000 Monterey 302 - Sold
    1995 Sea Ray 330DA - Sold
    2001 Regal 3780 - Sold
    Big ones
    I re-caulked some areas on the boat this weekend. I blue taped the edges, laid down the caulk: http://www.starmarinedepot.com/Boat+Life+Silicone+White.html

    (great stuff by the way)

    smoothed it out with a wet finger, than pulled the tape off.

    I noticed an 'edge' if you will where the tape and the caulk met. The caulk does not smooth out into the gelcoat. I was going to smooth it out again but had concerns about an uneven edge with the tape removed. Does this makes sense and what should I do different next time? The wife thinks it looks great, I am just being particular.
    Last edited: Sep 10, 2008
    Hampton likes this.
  10. tobnpr

    tobnpr New Member

    Nov 12, 2006
    New Port Richey, Florida
    1988 300 DA
    tw 350's w/ Alphas
    Trick is to have the caulk paper thin where it meets the masking tape. I usually use a plastic epoxy mixing stick (like a tongue depressor) to tool my joints, they have a nice radiused edge. If I'm very close at matching the radius of the tool where it meets the tape the caulk will have very little "edge" when the tape is pulled. If you tool the joint with something too wide, where the radius of the tool (or your fingertip) extends far past the inside edge of the tape, the caulk will have excessive thickness at that inside edge. That's why I don't use my fingers to tool a joint that I really care about, just not precise enough. Tough to explain, hope it makes sense...
    mrsrobinson likes this.
  11. GMAN1

    GMAN1 New Member

    Sep 4, 2008
    Fort Lauderdale, Fl
    51 Sundancer
    Cat 3196
    When you lay down a nice bead of caulk - I like to use baby wipes to smooth out. Simple clean up and easy to use. If sunny out - spray some soap and water over it and smooth out.

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