Techniseal WR7 Waterproofing Sealer - Brick & Masonry

Why Contractors Ask for WR7 Waterproofing Sealer by Name

Salt and freeze thaw cycles are what destroy masonry in a cold climate. Water gets in, freezes, expands, and takes the face of the brick or concrete with it. WR7 is aimed squarely at that mechanism.

• It prevents crumbling and spalling. Techniseal names salt and freezing cycles as the causes it protects against, which is the specific failure mode on northern masonry.
• It works on vertical surfaces. Most sealers in a hardscape line are for paving. WR7 is designed for vertical masonry such as retaining walls, piers, and brick facades. For horizontal surfaces, Techniseal asks you to contact them first.
• It protects against efflorescence, the white bloom that comes through masonry as moisture migrates and evaporates.
• It keeps a natural look on concrete, brick, and stone. Matt finish, no gloss. Techniseal notes it may darken some materials, and the surface may look darker for about 30 days.
• Broad surface approval. Techniseal lists natural stone, brick, concrete pavers, concrete slabs, interlocking pavers, poured concrete, and interior concrete.
• High grade water based formula, so cleanup and odor are manageable on an occupied property.

WR7 Waterproofing Sealer Specifications

Techniseal publishes 150 sq ft per gallon and 750 sq ft per 5 gallon, and notes that actual coverage varies with surface porosity. Brick and older masonry are typically thirstier than a dense concrete paver, so budget above the published figure on porous work.

Where WR7 Waterproofing Sealer Works

WR7 is the product for masonry that has to survive winter.

• Brick walls, facades, and chimneys
• Retaining walls and freestanding masonry
• Natural stone walls and vertical stone veneer
• Interior concrete walls
• Any masonry showing early signs of surface spalling
• Structures where a matte, natural look is wanted

How to Install WR7 Waterproofing Sealer

Follow the official Techniseal instructions, linked below. This is the shape of the job:

1. Clean the masonry thoroughly and remove any existing efflorescence.
2. Allow the surface to dry completely. Trapped moisture is the enemy of any waterproofing sealer.
3. Test a small discrete area first to confirm appearance and absorption. Techniseal notes the treatment may darken some materials.
4. Apply per the technical data sheet. On vertical surfaces apply from the top down in a single saturating coat, until it runs 6 to 8 in below the application point.
5. Respect the cure times Techniseal specifies.
6. Keep the surface out of service through the cure period.

On vertical work, saturation is the goal. Working from the top down in one saturating coat, until the product runs 6 to 8 in below the application point, is what keeps the protection even.