Window Goop

Tobby Litaker of Charleston, South Carolina, asks:"What’s the best sealant to use when reinstalling windows?"Don Casey replies:If you are talking about plastic windows, do not use polysulfide sealants, because the solvents they contain will cause the plastic to harden and crack. The adhesion of polyurethane sealants is compromised by the
Author:
Publish date:
Social count:
0

Tobby Litaker of Charleston, South Carolina, asks:

"What’s the best sealant to use when reinstalling windows?"

Don Casey replies:

If you are talking about plastic windows, do not use polysulfide sealants, because the solvents they contain will cause the plastic to harden and crack. The adhesion of polyurethane sealants is compromised by the outgassing of some plastics, so these likewise are a poor choice.

If your windows are sandwiched between frames, standard marine silicone is the sealant to use. Make sure that you do not squeeze out all of the sealant while it is wet. Essentially, you want to create a rubbery silicone gasket. Tighten the fasteners slightly after the silicone cures to put this gasket under compression.

If your windows are fastened directly to the fiberglass cabin side of your boat, consider using a structural glazing sealant, such as Dow Corning 795. Normally used to affix windows in office buildings, these silicone products have much stronger adhesive properties than marine silicone sealants. For step-by-step guidance on window replacement, you might take a look at the newest edition of my reference book, This Old Boat.

Related

01-Hanse_Emotion_6

Hanse’s E-Motion Electric Rudder Drive

When news that Hanse Yachts had launched a new form of electric-powered yacht first broke in the winter of 2016, it was widely reported. After all, Hanse is one of the world’s biggest builders of sailing boats, so this had the feeling of a breakthrough to it.After nearly a year, ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell.Got a tip? Send it to sailmail@sailmagazine.comDefusing the Run It’s been said with justification that gentlemen don’t boast about how windy it was, but the shape of my ensign in the photo will give well-informed readers a fair idea. They will also ...read more

01b-Over-Loch-Scavig

Cruising Across the North Sea

Conventional wisdom says sleeping in the V-berth while offshore is a bad idea. It can be like a diabolical amusement ride that tosses a sailor to and fro, inducing stomach-churning weightlessness. And yet, here I am, nestled in the tilted corner created by my berth and the ...read more

GG17-SAONA47-DX0796

Boat Review: Fountaine Pajot Saona 47

Here’s a riddle: What is less than 50ft long, has two hulls, three big cabins and four decks? Answer: The Fountaine Pajot Saona 47. In fact, it may even be five levels if you count the large engine rooms. This boat is a “space craft” in every sense of the word.DESIGN & ...read more

RichardBennettMIDNIGHT-RAMBLER3249x202

Storm Sails: Do you Need Them?

Many sailors embarking on ocean passages will take along the obligatory storm jib and trysail, with the vague idea that they may come in handy. Few sailors, however, have a real understanding of how and when to set them.It doesn’t help matters when we hear from seasoned sailors ...read more

IntheWater(1)

Boaters University Unveils Rescue Course

Boaters University has just announced its latest online course, Safety & Rescue at Sea, taught by Mario Vittone, whose name you might recognize from the pages of our sister publication, Soundings Magazine and his Lifelines blog.Mario Vittone is a retired U.S. Coast Guard rescue ...read more

IMG_20170920_132819

How to: Installing New Electronics

I had been sailing my Tayana 42, Eclipse, for a few years without any installed electronics on board. I’d gone pretty far up and down the New England and Mid-Atlantic coasts with paper charts, the Navionics app on my Android phone, a hand-bearing compass and the ship’s compass. ...read more