Know How: Epoxy Resin in a Caulking Gun

Like all owners of older boats who like to do their own work, I’m extremely familiar with epoxy resin. I reckon I’ve used a good few gallons of it, for both major projects and little jobs where only small amounts are needed.
Author:
Publish date:
epoxytop

I used the larger Flexpoxy dispenser—ideal for bigger projects. The smaller cartridge that fits in a standard caulking gun should suit most needs

Like all owners of older boats who like to do their own work, I’m extremely familiar with epoxy resin. I reckon I’ve used a good few gallons of it, for both major projects and little jobs where only small amounts are needed.

It’s for these latter tasks—sometimes involving no more than filling a few screw holes or bonding together small pieces of wood or fiberglass—that I’ve often cursed the need to get out the two cans of resin and hardener and mixing the required amounts. I’ve usually ended up with more resin than I can use, and that stuff’s too expensive to waste. Also, the epoxy invariably needs to be thickened so that it stays put, fills gaps, doesn’t sag and generally behaves itself the way you want it to.

This is what “thixotropic” means!

This is what “thixotropic” means!

Which is why I’m a total convert to Pettit’s Flexpoxy and WEST SYSTEM’s Six10 epoxies. These are both two-part epoxies that come in cartridges that fit in caulking guns; you just squeeze out as little or as much as you need, and mix the two parts together with a spatula. Six10 comes with a static mixer tip that dispenses the epoxy premixed, a good idea if you’re going to be using a lot of it at one time.

Both are extremely thixotropic, a ten-dollar word that means they won’t sag. This makes them ideal for overhead and vertical surfaces.

Six10 in action with its mixing tip, filling holes in a deck

Six10 in action with its mixing tip, filling holes in a deck

Having used these products extensively, I can recommend both of them. They’re described as “gap filling, structural epoxies.” I used the Flexpoxy when filling and fairing my cockpit prior to painting it, and for underwater fiberglass repairs. Most recently, the Six10 came in handy for filling a couple of dozen 5/16in bolt holes after I removed the beat-up old genoa sheet tracks—I applied masking tape under the deck, reamed out the holes with a slightly bigger drill bit to get rid of old caulking, and squirted the Six10 into them. A job that would have taken ages the oldfashioned way was accomplished in a few minutes.

Both products retain some flexibility when cured, and can be used above and below the waterline on fiberglass, wood, steel, aluminum and just about any other substance you’ll find on a boat. They’ll last for a year or more.

Related

IMG_0173

Electronic “Flares” for Cruisers

The United States Coast Guard requires that all boats operating in coastal waters or on the high seas carry a selection of visual distress signals. Almost invariably, such signals include the pyrotechnic type, either handheld or fired from a flare pistol, but surely there are ...read more

M2-HOOK-TOP-AND-CHAIN-1

Gear: M2 Chain Hook from Mantus

Stay Hooked Chain hooks on anchor snubber lines tend to fall off when you least want them to. Not so this latest example from Mantus. The M2 Chain Hook is secured to the chain by a simple elastic strap, so it won’t come off when the snubber loosens. Made from corrosion-resistant ...read more

shutterstock_349918991

Successful Surf Landings with Wheels

“Ready to take the dink ashore?” Never had those words invoked as much anxiety as when my husband, Jeff, and I first moved to the Pacific Coast. Why? Because we had exactly zero experience with dinghy surf landings, and the possibility of being flipped upside down along with our ...read more

Sail2010_597

How to: Find Good Values on Charter Vacations

So, you want to find a great deal on your next charter vacation? Sure, you can scour the internet, hope for Black Friday deals or ask friends. But an even better way to find good prices on charter boats is to go to a boat show. Not only do charter companies like The Moorings, ...read more

leadphoto

Know How: Dinghy Modification

The rigmarole of stretching a cover over a dinghy in choppy water prior to hoisting it on davits can become a very wet business if you’re not careful. Leaning right over either end, trying to stretch a cover over the bow and stern pods can quite easily result in a head-first dip ...read more

25980

Catnapped Aboard a Racing Multihull

It was after midnight when I realized my daysail with Tony Bullimore aboard his giant record-breaking catamaran, Team Legato, was not going to plan. The big cat was en route for a December dash from England across the Bay of Biscay to Barcelona and the start of a drag race ...read more