Superior High-Quality Caulks That Last

Using and Recommending the Best Caulking for Raleigh Homes

If you have a technical mind or are just curious about caulk, you’re headed in the right direction. All our painting services include the highest-grade caulking from Sherwin-Williams, while our competitors try to hide the cheaper caulk they use or try to convince you it’s good quality. The fact is, premium caulk does not cost that much more, but boy does it bridge gaps, seal moisture, and give paint the underbody protection it needs to stay intact.

The average full exterior painting project in Raleigh, for example, requires 18 to 48 tubes of caulk, and the difference between 850A and Shermax is less than $4 per tube.

Clients looking for recommendations for caulking outside our service typically fit into one of three categories. Most homeowners are misinformed about quality, the best type, or are completely misguided altogether. We see clients using caulking to fill holes, using the wrong caulking for specific applications, and others who have brand loyalty and don’t realize why.

Every caulking has a purpose, and just because it is on a shelf at your favorite local home improvement store in Raleigh does not mean it is the best or appropriate for your needs. Using an inexpensive tube is the fastest way to ruin a premium paint job.

Sherwin-Williams SherMax Our Premium Caulk of Choice

When clients ask us for a single “best all-around” recommendation for a standard painting project, we point them toward Sherwin-Williams SherMax. For indoor and outdoor usage on our local projects ranging from Wendell to New Hill, NC, SherMax has proven to be the most versatile urethanized elastomeric sealant for both interior trim and exterior siding. It used to be thin, which is not ideal for outdoors. But now, since MaxFlex has been discontinued, it has taken the characteristics of a heavier sealant without the drawbacks. It wipes smooth, is easy to dispense, and holds shape when applied to large holes. However, the most important is its elasticity. We have not seen a properly caulked seam crack yet.

Since caulking is always changing, we had to reassess SherMax. We retested it on a new trim installation project in the Devon subdivision. The home featured extensive custom crown molding and built-ins. Like the older formula, it did not try to dry prematurely, causing wrinkles. No, it laid a smooth line when coming out of the gun and wiped smooth. When we applied that gloss paint, the seams were nearly invisible.

It not only creates a razor-sharp interface between walls and trim, but it also provides the high-performance elasticity of a urethane. This means we get the fine finish needed for indoors, paired with enough durability to bridge those expansion joints, where the thicker Masonite siding meets thinner HardiePlank. Or, those tight outside corners on fascia boards.

And when we are done, we are not overly concerned about warranty claims from Raleigh’s brief summer rain and wind storms. The technical stability it provides is worth the extra cost.

So, we know SherMax is great since we test it and use it every day. Close contenders are Sashco Big Stretch and AllPro Pro Stretch.

Specialized Sealant for Areas Around Your Home

Some demanding clients insinuate the use of bad caulk or question the quality. Since technical explanations are right up our alley, especially when asked, we also create articles like this one for reference. However, either as we are starting or finishing up, we are often asked about other applications. Like how to seal a leaky gutter, or sealing the flashing around a brick chimney. From tubs, tile, concrete, you name it! If approcable and not too hard at work, our client trusts us, so they ask.  

Below is our field guide to the top specialized sealants we use around Raleigh when a standard painter’s caulk isn’t enough.

The Moisture and Glass Specialists

For areas subject to permanent moisture, such as high-use bathrooms, we skip the standard tubes and use Lexel. It is often described as “duct tape in a tube” because it is the only sealant that consistently sticks to wet or non-porous surfaces like glass and tile.

Conversely, if you are sealing a window or door frame where you do not intend to paint, GE 100% Silicone is the gold standard for mold resistance and long-term waterproof integrity, though its non-paintable nature makes it a “final step” product only.

The Heavy-Duty Exterior Contenders

For the majority of Raleigh homeowners dealing with extreme expansion and contraction in bathrooms with inadequate exhaust fans or ventilation, we resolve this issue with GE Silicone Supreme Hybrid. It provides the permanent seal of silicone. This seal is crucial for high water vapor collection in bathrooms with crown molding, and it is paintable.

Siding and Gutter-Specific Solutions

If your home features HardiePlank or original Masonite siding, we recommend OSI Quad Max. We frequently source this from Lansing Building Supply in Garner. They carry OSI’s factory-matched colors for James Hardie’s ColorPlus prepainted siding. Quad Max is a silane-modified polymer, meaning it creates a mechanical bond with siding fibers that standard acrylics can’t match.

For the 6-inch seamless gutters we install throughout the Triangle, we rely on Lucas Sealants. This thermoplastic elastomer ensures a leakproof metal-to-metal bond that withstands the weight of heavy North Carolina seasonal rains and resists the organic matter that causes mildew to grow inside the joints between the gutters and the fittings.

Emergency & Multi-Use Sealant from the Box Stores

For minor DIY projects or areas that require a fast turnaround, DAP Extreme Flex offers a user-friendly, quick-drying solution that is far better than their entry-level lines.

Caulk is a wet substance that dries to form a flexible material that seals cracks and gaps. It is the most effective material at preventing air and moisture from entering surfaces. General usage includes expansion joints, small gaps, and cracks. Caulk should not be used to fill screws or nail holes.

Our extensive experience and field tests enable us to provide sound recommendations on the best interior and exterior caulk for a range of applications.

The Limitations and Risks of Using Specific Caulking Types

As painters and homeowners, we expect a lot from the caulking we buy. Sealing, not breaking, sticking, and being easy to apply are just a shortlist of demands we expect. The reason it never rises to our expectations is that we are not willing to pay a higher price, and we don’t often acknowledge its importance. And stats prove to manufacturers that cheaper caulk sells better. For this reason, the caulking that we use has fillers. Most caulking a painter uses is filled with Clay. It reduces cost and makes it easier to work with.

Conclusively, there is a lot to be desired when it comes to caulking. A general rule of thumb is that any caulking that is bought for under $3 should be avoided. It is also vital to look beyond the price tag and understand the chemical composition of the sealants applied. Many “contractor grade” caulks contain phthalates and high-VOC solvents that off-gas during the curing process. Also, be aware of crystalline silica. It is a respiratory hazard found in many mineral fillers. We also recommend avoiding low-grade vinyl or acrylics altogether. They lack the molecular elasticity required to prevent premature cracking during natural home settling.

Furthermore, our team emphasizes the importance of avoiding the common misuse of pure silicone on surfaces that potentially will be painted later. While it is a durable material for certain applications, its paint-repellent nature will cause total coating failure if applied where a seamless architectural finish is required. Choosing a high-performance sealant is about more than just filling gaps—it is about the long-term durability of your home and the structural integrity of your paint job.

A Story From The Owner

A lot of my firsthand experiences are most recognizable when I was younger. I remember working with a local painter out of Wake Forest. Since most of our work was in that area, I saw myself running into other painters in the area. Everyone had the mentality that homeowners were somehow clueless, as if they did know and did not want to know.

They essentially had the mentality that using better materials would not be beneficial or would somehow be unnoticed. It was a mentality that said in so many words, no one wants to pay for it, and I am certainly not going to lose profit or try to explain it.

By no means am I trying to imply that other painters or painters in Wake Forest are bad. It is just a story of an encounter that shaped my mentality as a youngster starting out. This process of professional character building is just one of many instances that shaped my approach today. We are going to provide the best and rightfully charge you for it, not because you know the difference but because we do.

Advice if You’re Going to Caulk

The most common mistake we see is over-caulking. Many DIYers attempt to use caulk to fill large voids or nail holes. However, caulk is a bridge, not a filler. It should only be used to seal the seams between two overlapping or joining materials.

Furthermore, never fall for the 30-minute rain-ready marketing trap if you are working in high-humidity or cooler conditions below 55 degrees. We’ve seen hundreds of new construction projects around the new Holly Springs and Fuquay areas where the paint failed because the moisture was trapped behind a fast-drying bead.

We use 1050A in late fall and early winter, which is considered a fast-drying caulk. But even then, we wait until the next day before we start painting.

Caulk Applications & Lifespans

Here is a list of how long you can expect your caulking to actually last in our local area. Use this guide to know when to start inspecting the caulking for failure and when a reapplication is needed.

Caulking With Intent

Caulk and other sealants are the heart of any paint job. While it may seem less consequential for new homes, the first application could be argued as the most important. However, unless you are building a custom home, you have little control over what the nation builder uses. But repairs and repaints are where you can make up for the use of cheap preparation materials.

So, after-market services are often where homeowners can make upgrades and beneficial improvements. While vetting your painters is important, it is also just as vital to understand exactly the materials being used. When looking for premium service that puts your need for quality above convenience, call or contact your local painters at A Touch of Color Painting & General Contracting.