How to apply Aqua Block^®

Applying Aqua Block, step by step

1. 

   01 Step 1 of 6

   Repair and prepare the concrete

   The barrier can only be as continuous as the surface under it. Close the cracks, take off what is loose, and let it dry.

   • Repair cracks and damaged concrete before any coating goes on.

   • Brush off dust, laitance, loose particles, grease and oil.

   • The concrete must be dry — never coat over standing water.

   • Let fresh repairs set and dry out before you start coating.

   Sound, clean, dry concrete

2. 

   02 Step 2 of 6

   Stir well before use

   The protective solids settle while the tin stands. Stir from the bottom until the colour and the body are even the whole way through.

   • Stir thoroughly, lifting from the bottom of the tin, every time you start.

   • Do not thin it. AQUA BLOCK is direct apply — no primer needed.

   • Keep the container tightly closed after use.

   • Work in a well-ventilated area, in goggles, mask and gloves.

   Direct apply — no primer, no thinner

3. 

   03 Step 3 of 6

   Apply using brush or roller

   An even coat straight onto the top of the belt, where the wall will sit, worked to a visible wet edge along its length.

   • Lay an even coat with a brush or roller — no primer first.

   • Coat the top of the belt, the face the wall is built on, before any masonry goes on it.

   • On a concrete door or window frame, coat the face that will meet the wall.

   • Do not apply during rain or on a damp surface.

   First coat

4. 

   04 Step 4 of 6

   Allow to dry 2–3 hours

   Let the first coat dry before the second goes on. Two to three hours is the recoat window; humid weather takes the long end of it.

   • Keep the belt out of rain and splash while it dries.

   • Touch-test a hidden stretch: dry, not tacky, before you recoat.

   • Do not stack materials on it or walk on the wet film.

   • Do not force-dry with heat.

   2–3 hrs before the second coat

5. 

   05 Step 5 of 6

   Apply the second coat

   The second coat is what closes the barrier across the concrete. Same method, same coverage.

   • Same even coat, over every stretch the first coat reached.

   • Look along the belt in raking light for pinholes and thin spots.

   • Do not stop at one coat — one coat is an unfinished barrier.

   • Close the tin tightly as soon as you are finished.

   Second coat

6. 

   06 Step 6 of 6

   Cure, then build the wall

   Allow complete curing — 5–8 hours for a hard dry — before the wall is built on the belt or the surface sees water.

   • 5–8 hours for a hard dry, and complete curing before exposure to water.

   • Only then lay the first course of the wall on the coated top.

   • The coat stays under the wall as the separation layer between concrete and masonry.

   • Store the remaining tin closed, cool, dry and out of direct sunlight.

   Hard dry 5–8 hrs