How to Install Peel and Stick Backsplash in Corners

Prepare the Surface

  • Ensure the wall surface is clean, dry, and free of debris. Wipe it down with a damp cloth.
  • Fill any cracks or holes with spackle and let dry completely.
  • Sand any bumps or uneven areas. The surface should be as smooth as possible for good adhesion.
  • Wipe away any dust with a tack cloth.

Measure and Cut the Backsplash

  • Measure each corner carefully to determine the size pieces you will need.
  • Transfer measurements to the backsplash and cut with a utility knife.
  • Cut pieces about 1/2 inch larger than the measured size to allow for adjustment.
  • For outside corners, cut one piece to wrap from one wall across the corner to the other.
  • For inside corners, cut two separate pieces.

Prepare the Backsplash

  • Lay the backsplash pieces face down on a flat surface.
  • Peel off the backing about 1-2 inches from the edge on each piece.
  • On inside corner pieces, peel off backing on both sides that will go into corner.

Install the Corner Pieces

  • Line up one edge of the outside corner piece precisely in the corner.
  • Press firmly into place on one wall then work across pressing it into the corner and onto the adjacent wall.
  • For inside corners, take one piece and align one peeled edge into the corner.
  • Press firmly ensuring maximum contact where the piece meets the corner.
  • Install the second piece in same way on other wall.

Adjust and Finalize

  • Once corner pieces are installed, if necessary, peel back partially and re-adjust to get a tight fit into corners.
  • Use a smoothing tool or the edge of a credit card to press down edges and remove any air pockets or bumps.
  • Peel off the rest of the backing and press the entire piece firmly to the wall.
  • Install adjacent pieces in same way, making sure seams are tight.

Finishing Touches

  • Use a utility knife to carefully trim any overhanging edges against countertops, ceiling, etc.
  • Caulk along the top edges, seams, and corners using a silicone caulk that matches the color.
  • Let caulk dry completely before using the backsplash.

With careful prep and some patience during installation, peel and stick backsplash can be seamlessly continued into corners for a finished and professional look. Take time to get the first few corner pieces aligned properly and the rest will fall into place easily. In no time, you will have a stunning backsplash that completely transforms the kitchen.

Frequently Asked Questions About Installing Peel and Stick Backsplash in Corners

What’s the best way to get straight cuts on peel and stick backsplash?

Use a sharp utility knife and metal ruler to measure and cut the pieces. Take your time and score the material several times rather than trying to cut all the way through in one pass. The cleaner the cut, the tighter the seams will be.

Should I use caulk between the corner pieces and the wall?

Yes, caulking the seams is recommended not only in corners but along the entire installation. Siliconized caulk that matches the color of the backsplash blends in for a seamless look.

What if the corner isn’t perfectly square?

Many corners are not perfectly 90 degree angles. Measure carefully and cut the backsplash pieces to fit the actual angle of the corner for the best fit. Having a 1/2 inch overlap allows minor adjustments.

Can I install peel and stick backsplash directly over existing tile?

This is not recommended. The grout lines and uneven surface of existing tile can show through the backsplash. It is best to remove tile and start with a smooth, flat wall surface.

Should I use a level to check alignment?

Yes, having a level handy is useful to periodically check that lines are straight and pieces align correctly during installation. This helps prevent crooked corners.

What temperature is best for installation?

Ideally 60-75°F is recommended. Avoid cold and overly hot conditions. Heat helps the adhesive stick better while cold can prevent good adhesion.

How soon can I use the backsplash after installing in corners?

It’s best to wait 24-48 hours for the adhesive to fully cure before using the backsplash. Avoid pouring liquids directly onto seams and corners right away.

What if the corner isn’t perfectly square?

Many corners are not perfectly 90 degree angles. Measure carefully and cut the backsplash pieces to fit the actual angle of the corner for the best fit. Having a 1/2 inch overlap allows minor adjustments.

How can I make rounded inside corners look nice?

For inside corners with a rounded shape, use a file to round the edges of the backsplash to match the wall curvature for a tight fit. Apply carefully to avoid bubbles in the rounded area.


Installing peel and stick backsplash in corners adds a challenge, but with careful prep work, precise cutting, and good adhesive technique, it can look flawless. The key is taking the time to measure properly, test fit pieces, adjust as needed, and apply adequate pressure when installing for maximum stick. Finishing with caulk hides any imperfections for a polished look. With some patience, the end result will be stunning backsplash that extends seamlessly around any kitchen corner.