Masonry Sealers & Water Repellents

Unsealed masonry absorbs moisture, stains easily, and deteriorates faster than it should.

Whether you're dealing with porous brick, exposed concrete, natural stone, or rendered walls, the right sealer makes the difference between a surface that lasts decades and one that needs repairing within years. Water ingress is the primary cause of masonry deterioration in New Zealand and it's entirely preventable.

Stratacote's masonry sealer range includes silicone-based water repellents and nano-technology sealers designed for New Zealand conditions - invisible protection that doesn't change the look of your surface while locking out moisture, reducing staining, and extending surface life. Suitable for homeowner DIY application and large-scale contractor projects alike.

BENEFITS

  • Invisible protection. Shields surface without changing natural look or texture. 
  • Long lasting defence. Repels water, stains, and grime for extended surface life and appearance. 
  • Weather resistant. Protects against moisture ingress from driving rain, frost (spalling) and UV damage year round. 
  • Easy to apply. Simple application with professional grade results  
  • Reduces maintenance. Keeps surfaces cleaner for longer saving time and effort. 
  • Reduces repair costs. Eliminates the need to repair cracked and broken mortar. 
Skip to results list
Product Category
Product type
Brand
2 items

Filter

Product Category
Product type
Brand

Application

Aquaseal-WB Sealer application

The cost effective solution for Oamaru stone, concrete block and soft clay bricks. Not recommended for dark glazed or red bricks.

  •  Aquaseal-WB prevents dampness and mould on internal walls, helps in the prevention of freeze/thaw damage on porous surfaces by stopping ingress of moisture.
  • Aquaseal-WB can be applied to a dry or slightly damp surface.
  • Lasts 3-4 years

Mix at a ratio of 1:14 with water. 1L of Aquaseal-WB is mixed with 14L of water, so makes 15 litres of usable solution. Substrate must be cleaned prior to sealing.

Coverage: Once mixed this will cover approx. 3m² per litre.
Nanocote Sealer application

Nanocote – high performance product suitable for almost all surfaces. VOC free, long lasting.

  • Nanocote is designed as a water-soluble impregnating agent for masonry that chemically bonds with masonry substrates and becomes invisible once dry. Its penetration and subsequent chemical reaction with the surface allows it to provide long term protection by significantly reducing the ingress of liquid water and any dissolved salts and contaminations that the water may carry.
  • Nanocote sealer is water repellent so it can’t be recoated effectively once it is dry. Therefore to get enough penetration we usually recommend spraying over the same area twice while the first coat is still wet, starting from the bottom of the stone and then coming down from the top of the stone is a good way to ensure this. This ensures the same area is given 2 coats while the first coat is still wet, which allows plenty of opportunity to coat all areas and penetrate the stone.
  • Substrate must be clean and dry before application of Nano-cote
  • Lasts 8-10 year

Mix at a ratio of 1:9 with water. 1L Nanocote is mixed with 9L water, so will make 10L.

Coverage: 2.5 – 3m2 per L of mixed product, depending on substrate

Compare Aquaseal & Nanocote

What do I need?

Aquaseal-WB- Silicone Masonry Sealer (Concentrate)

Aquaseal-WB- Silicone Masonry Sealer (Concentrate)

$137.42
  • Invisible once dry on stone and concrete. May leave a white salty film on red brick.
  • Lasts approx. 3 years.
  • Lower purchase price.
  • Aquaseal is not harmful to plants – (we do advise covering delicate or important plants)
  • Nontoxic to people and pets, unlike many others on the market.
  • Aquaseal can be applied to damp surface.
  • Aquaseal will etch glass and joinery – so covering prior to sealing is recommended.
  • Fume free and non-flammable.
Shop Now
Nano-cote Sealer 1L

Nano-cote Sealer 1L

$232.54
  • Invisible once dry.
  • Lasts approx. 8 years.
  • More cost effective in the long run as more durable.
  • Nano is not harmful to plants – (we do advise covering delicate or important plants)
  • Nontoxic to people and pets, unlike many others on the market.
  • Nano can only be applied to completely dry surface.
  • Nano does not etch glass and joinery (it can leave a light residue, so is advised to cover windows prior to sealing)
  • Not corrosive, non-flammable and non-carcinogenic. Odour/fume free.
  • Penetrates deeper into the brick or stone than Aquaseal.
  • Does not rely on solvents and other hazardous materials for penetration
  • Meets modern environmental and other building standards and requirements
Shop Now

Download Product Application Guide

Download PDF