Get an Airtight Caulk Tube Seal
Done with the caulking job but the tube’s only one-third empty? Dip the nozzle into a can of Plasti Dip rubber coating ($6 at a home center). You’ll create an airtight seal that’s easy to peel off when the next job calls. Thanks to Kevin Lind for this tight tip.
Done with the caulking job but the tube’s only one-third empty? Dip the caulk tube nozzle into a can of Plasti Dip rubber coating. You’ll create an airtight seal that’s easy to peel off when the next job calls. Thanks to Kevin Lind for this tight tip.
Check out these Tips For Caulking. Use these tips for perfect results every time!
Four Common FormulasThese types of caulk dominate the shelves at home centers. Labels don’t always tell you what’s in the tube, so we’ve included examples of each type in this article. But there are many more brands than the ones we show. All are available in various colors and paintable.
- Acrylic Latex: $2 to $5: Acrylic latex caulks are the easiest to apply and smooth out. They’re also the only sealants that clean up with water. Look for versions labeled “siliconized” or “plus silicone.” Adding silicone to acrylic latex improves adhesion and flexibility.
- Polyurethane: $6: Poly caulks are generally tougher than other sealants, making them a good choice for driveways and other areas that take a beating. But their gooey consistency makes them hard to work with. Check the label before painting; you may have to wait several days.
- Solvent-Based: $6 to $9: Many solvent-based caulks are great for roofing because they don’t degrade in direct sunlight and can be applied to wet surfaces. But they’re gooey and hard to apply neatly.
- Hybrid: $7 and up: Most hybrid caulks combine silicone and polyurethane for top-notch adhesion, flexibility and longevity. They’re easier to apply neatly than polyurethane, but not as easy as acrylic latex. Most aren’t labeled “hybrid,” so we’ve pointed out the hybrids in the various photos. Cost is a clue: High-quality hybrids are usually the most expensive caulks on the shelf.
Exterior Siding and Trim: Choose a Hybrid or PolyurethaneOn your home’s exterior, high-quality caulk is critical—it locks out water, protecting your home against rot and peeling paint. Although some inexpensive acrylic latex caulks are rated for exterior use, we recommend hybrid caulks because they offer better adhesion and flexibility. For matching the appearance of materials like stucco or rough-sawn wood, we like Vulkem, a textured polyurethane. Check out these Tips For Caulking. Use these tips for perfect results every time!
Exterior Siding and Trim: Expensive Caulk is Worth ItThe most common reason for using caulk, whether indoors or out, is to prevent water penetration—and serious damage. That’s why spending an extra five bucks on high-quality caulk is usually smart. Get exterior caulk on Amazon now.
Interior Painting: Choose Acrylic LatexThis is the one project for which it doesn’t make sense to spend a lot of money. For just a couple bucks, you can find a caulk that dries fast, is easy to work with, easy to clean up and can handle a little movement. Alex Plus is one good choice, but there are several others. If you have a large recurring crack in a wall corner or in a crown molding joint, choose a product with better flexibility such as a hybrid formula or Big Stretch acrylic caulk. Check out this tip for how to get smoother caulk.
Interior Painting: A Superior Acrylic Latex CaulkLike other acrylic latex caulks, Sashco’s Big Stretch is easy to smooth out and cleans up with water. Unlike other acrylic latex caulks, it offers great adhesion and amazing elasticity. We tested Sashco’s claim that it will stretch “more than 500 percent of its original size.” Claim verified. Depending on the color and retailer, Big Stretch costs $7 to $12 per tube. Get it now on Amazon.
Kitchen and Bath: Just Check the LabelCaulk in kitchens and bathrooms is often visible, so choosing a product that’s easy to apply neatly is important. It also needs to be waterproof and mold and mildew resistant. Choose a product labeled with those traits. Acrylic latex kitchen and bath caulks are the easiest to work with, but hybrids generally have a longer life span. Check out why you should caulk your toilet to the floor.
Kitchen and Bath: What About Silicone?Years ago, silicone caulk was a good choice for many jobs. Today, there are better options for almost every situation. So why is silicone still so popular? Here’s what one manufacturer of caulks (including silicone) told us: “Silicone is what our customers saw their fathers use. It’s what they’re familiar with.”
Concrete and Masonry: Choose a Specialty CaulkA caulk specially formulated for concrete and masonry will outperform general-purpose products. Seal cracks in concrete with durable urethane caulk. It'll keep water out and protect your foundation and walks from further cracking and eroding. You can do it in less than a half hour.
Concrete and Masonry: Self-Leveling or Not?Most concrete and masonry sealants are polyurethane or hybrid formulas. But one acrylic latex product, Slab, also performs well, especially on concrete cracks that move a lot. Some concrete and masonry caulks are self-leveling and can be used only on level surfaces. Buy it now on Amazon.
Roofing: Consider the ElementsAny caulk that lives on a roof is going to get hammered by the elements. Choose a solvent-based sealant. Exterior caulking is a lot like interior caulking: Your goal is a neat-looking seal over cracks and gaps. But outdoor caulking deserves some extra attention. It will have to withstand all the extremes that nature can dish out. And when an outdoor seal fails, water gets in and serious trouble follows. So here are some tips for exterior caulking that lasts.
Roofing: Choose Solvent-Based SealantsThe caulk used for roofing needs to be able to survive extreme exposure to sunlight and temperature variations yet remain flexible. The two recommended products, shown above, can actually be applied on wet surfaces!
Gutters: 100 Percent WaterproofIt’s no surprise that a product designed to seal gutters needs to be 100 percent waterproof. But it also needs to be tough— tough enough to handle the abrasion from debris and ice in colder climates.
Gutters: Go With a Hybrid or Solvent-Based ProductMost gutter sealants do a good job on metal, but not all will adhere to plastic gutters. Be sure to check the label. Caulking is a quick and inexpensive way to keep rainwater and storm surge out of your house and strengthen vulnerable areas from high winds.
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