Colored Caulking

A tube of Polyblend color-matching caulking

Did you know that you can get acrylic and silicone caulking that matches the color of your grout?


Colored caulking is useful for backsplashes, tiled showers, or in any installation where you need a flexible seam of a particular hue.


We stock over 40 different colors of caulking designed to match the color and texture of grout. We can also order caulking that matches several popular grout brands such as Custom Building Products, Laticrete, Mapei, TEC, and Bostik.  

When (and why) do I need to use caulking?

Inside Corners for added Flexibility

Cracked grout between glass bubble mosaics and porcelain tiles.
Grout can crack and separate from tile, while caulk remains flexible. This inside corner should have been caulked to prevent these cracks.

The Tile Council of North America recommends that you use caulk instead of grout on any inside corners. Where your backsplash meets your countertop, where your shower walls meet your bathtub, where your tile baseboard meets your tile floor, where one tiled wall meets another tiled wall, use caulking.


When two planes meet in a house (wall meets floor, wall meets wall), there will be flex and movement. Even the sturdiest house has some movement. If grout is installed in these corners, there is a chance it will crack or separate from the tiles, allowing moisture or dirt to get through and creating a shoddy look.


Caulk remains flexible when installed, while cement-based grout is very brittle and epoxy grout is not very flexible. 


With highly flexible grouts such as urethane and single-component grout, you have the option of forgoing caulk and using the grout your inside corners. However, these grouts are not as pliable as caulking.

Finishing Edges

Caulking the edge of a backsplash

You can also use caulking at the edge of your tile installation to hide the unfinished edge of your tile. Caulking is the least expensive finishing option (short of leaving the edge bare), and is a simple alternative to bullnose tile, pencil liners, or metal edging.

Siliconized Acrylic and 100% Silicone Caulking

What's the difference?

Shower stall with all inside corners highlighted in red

Simply put, 100% silicone caulking should be used to caulk showers, and siliconized acrylic caulking should be used everywhere else.


Siliconized acrylic caulking is less expensive, easier to clean up, and better matches the texture and look of your grout; but 100% silicone caulking lasts much longer in wet areas.


In areas that might get water splashed upon them, such as kitchen or bathroom backsplashes, we recommend using regular siliconized acrylic caulking. These areas aren't exposed to the high quanities of water that the walls and floor of a shower are, and don't require the heavy-duty water-resistance of a 100% silicone caulk.


Silicone caulking is also a lot more flexible and stretchy than acrylic caulk, so if you have a dry area with high flex and your acrylic caulking keeps separating or tearing, use silicone instead.

Siliconized Acrylic Caulking


+ Ideal for dry areas (backsplashes, doorway transitions, etc.) 


+ Two textures: sanded and non-sanded


+ Less expensive, $8-15/tube


+ More flexible than grout, not as flexible as silicone

100% Silicone Caulking


+ Ideal for wet areas (showers, bathtub surrounds)


+ One finish: smooth with a slight sheen


+ More expensive, $20/tube


+ More flexible than acrylic caulk

Order Custom Colors!

Red grout in between small pink tiles.
Need to match a unique grout color? We can order caulking that matches perfectly!

Are you replacing tiles set with a grout color that's no longer available? Are you not able to find a grout that perfectly matches your paint swatches? Maybe you just want something unique, like a flaming red or bright green?


We work with a caulking manufacturer that can create siliconized acrylic caulking to match any imaginable color. Contact us for more information at or call 253-872-0449. Minimum order of 4 tubes.

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Comments: 6
  • #1

    Bob Peterson (Wednesday, 30 December 2015 14:14)

    Have put down Allure corfu flooring in this old house(not the tv program ;) and have some gaps i joints and threshholds, plus some where I had to cur to fit spots. I am looking fora seam filler to make it look right. I have tried suggested places, but from Hoe Depot to cust. building prod. polyblend and have not had any answers. Am I any closer contacting you folks? If you don't have what I need, would you know where to direct my search? Sure do appreciate your time and help. Bob the stuck floorer ;(

  • #2

    Tile Lines (Wednesday, 30 December 2015 16:06)

    Hi Bob,

    We don't deal much with vinyl flooring, but I recommend using a non-sanded acrylic caulking in a color that matches your floor to fill the gaps. It will have a smooth texture when dry. You can get acrylic caulking at most home improvement stores, just bring a sample of your flooring to match against their color samples.

    Good luck with your project!

  • #3

    Steve (Wednesday, 11 May 2016 20:22)

    We have installed a backsplash in our kitchen with very pourous stone with each tile having a large bevel. I want to use your caulk instead of grout because i just want to fill the joints not fill all the stone tile imperfections. Why cant we use caulk ( Easy to control how much we fill joints)

  • #4

    Tile Lines (Thursday, 12 May 2016)

    Hi Steve,

    You can use caulk, but it won't last as long as grout. Cement, urethane, epoxy, and other grouts are designed to be very solid and durable when fully cured (after appx. 3 days), and can stand up to repeated cleaning. Grout should last 15+ years when installed and maintained properly.

    Caulking is more flexible, softer, and more spongy than grout. Easier to scratch or damage when removing messes or scrubbing it clean. In high-use areas such as showers, caulk usually has to be replaced appx. every 3-5 years due to wear (more frequently if there's poor ventilation in the room, leaving lots of moisture sitting on the caulk and causing a mildew problem).

    Backsplashes are relatively low-use areas, however, so as long as you use gentle cleaners and don't scrub it too aggressively when cleaning, the caulk could last several more years before needing to be replaced or patched up.

    Make sure you seal that stone though! Any food, oil, or grease splashing on the backsplash could stain it if it's not sealed.

    Hope that helps!

  • #5

    Bob Benson (Friday, 03 August 2018 10:02)

    I have been trying to find silicone "New Taupe" to match your grout. Any ideas?

  • #6

    Tile Lines (Friday, 03 August 2018 17:09)

    Hi Bob,

    We do sell Custom Building Products' New Taupe color in silicone. You can contact us directly at or call us at 253-872-0449 to order some.

    If you're not local, we recommend checking with local tile shops to see who carries Custom Building Products. You can also contact Custom Building Products' customer support line to find a distributor near you.