Hempel’s Underwater Primer is a quick drying substance that can be used as an antifouling primer, a keel primer or as an antifouling sealer/tie-coat. A fantastic characteristic about the primer is that it can be used as a sealing between an old and new antifouling paint. For use on all areas below the waterline, including keels.

We've written up a few frequently asked questions that are asked in store for a little extra guidance.

How can Hempel Underwater Primer be applied?

Application can take place via a spray, a roller, a paint brush or a paint pad. It is recommended that painting via spray is only done by professionals. A minimum of 2 coats are recommended.

How long should I wait in-between coats when applying Hempel Underwater Primer?

If applied at 10C, three hours. If applied at 20C, six hours.

How long does Hempel Underwater Primer take to dry?

At 20C, three hours. At 10C, six hours.

What is Hempel Underwater Primer's coverage?

Approximately 7.8 metres square per litre.

At what temperature can Underwater Primer be applied?

It is recommended that the substance is applied at temperatures between 5C and 35C. Avoid applying in direct sunlight.

What is the flash point of Hempel Underwater Primer?

35C.

What finish can I expect from Hempel Underwater Primer?

Flat.

Useful Links:

Hempel Underwater Primer Product Data Sheet.
Hempel Underwater Primer Safety Data Sheet.