How do Classi Plus work?

How do Classi Plus work?

How does Classi Plus work?

Classi Plus works in the same way as Classi Seal- it is installed in the same way. The main difference is in the upstand. The Classi Plus has a 100mm tall upstand and has a fleeced outer around the waterproofing membrane. This fleeces outer has two main advantages. Firstly it is very compatible with liquid sealing applied membranes- so you can simply paint over the upstand and secondly it is very compatible with tile adhesive. So if you are finishing with tiles or are applying paint on liquid applied sealing membranes then Classi Plus is the product for you.


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How to use Classi Plus

Step 1

Thoroughly roughen and clean the sides of the tray or bath that the Classi Plus is to be attached.

Step 1

Step 2

Remove the backing paper 100mm at a time and align the top of the adhesive strip with the top edge of the shower tray or bath and firmly press on by hand.

Step 2

Step 3

Before applying around the corners, pinch the Classi Plus to allow extra material in the corners – this helps with subsequent tiling. When finished applying, give the Classi Plus one last rub all the way around to ensure the perfect seal – paying special attention to the corners.

Step 3

Step 4

Apply C2 tile adhesive to wall behind Classi Plus upstand. Press upstand into adhesive with the back of the trowel ensuring there are no air pockets.

Following tiling or wall panelling, finish with a Neutral Cure Sanitary Grade 100% Silicone. Classi Plus prevents water leakage from around shower trays and baths caused by the inevitable shrinkage and movement within buildings.

Step 4



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I recently changed the design of my bathroom and used Classi Seal to ensure my bath with an overhead shower was fully waterproofed. The bathroom retailer and my plumber both recommended I use Classi Seal in my project and I’m so glad I did. High quality product that does exactly...
Chris