Product Update: MK-40 Mer-ko Topcoat

Posted in Product News  |  June 27, 2023

We are excited to announce our improved MK-40 Mer-Ko Topcoat.

This topcoat is a high-performance 100% acrylic water-based coating, that has excellent resistance to weather and dries quickly. MK-40 is designed to be used as the topcoat for Weather Deck and Shur Deck Systems.

Product update

View Technical Bulletin

Some of the benefits and improvements made to these materials are:

Effective Date

Starting June 26th 2023 or all batch numbers 23177 or later.


MK-40 may appear different from previous batches. It is recommended to avoid use with

previous batches, to ensure consistent sheen, color and overall finish.

If you have any additional questions on this improved formula, please contact your local

Mer-Ko Sales Representative or contact us at 1-844-537-7203

Topcoat color chart

View Updated Color Chart