Mortar Additives & Masonry Cleaning Products

Southtile Ltd – Trusted by Bricklayers, Builders & DIYers Across NZ

Simplify Your Bricklaying Tasks with Smart Additives

Whether you're laying bricks, blocks, or stone, the right mortar additives make all the difference. Southtile Ltd supplies industry-trusted solutions to improve workability, durability, and finish—available online and in-store with NZ-wide delivery.

Mortar Additives for Better Performance

Masons Air Flex – 15Kg

A powerful plasticizer designed for brick and block layers.

• Extends mortar working time

• Improves spread ability and adhesion

• Reduces cracking and shrinkage

“Ideal for large-scale projects and hot weather conditions”

Lime Juice Mortar Additive

Enhance mortar consistency and bonding strength.

• Improves workability and finish

• Reduces water demand

• Compatible with most cement types

“Perfect for traditional bricklaying and restoration work”

Oxides for Colour Matching

Add vibrant, long-lasting colour to mortar and concrete. View Our Oxide Range.

Masonry Cleaning Products

Cem-Gon Concrete Splash Removal Spray

Effortlessly removes concrete splashes from:

• Stainless steel

• Aluminum joinery

• Asphalt

• Copper surfaces

“Fast-acting and safe for sensitive finishes”

Hydrochloric Acid – 20L

Heavy-duty cleaner for masonry and concrete surfaces.

• Removes stubborn stains and efflorescence

• Ideal for post-construction cleanup

• Use with caution and proper PPE

“A must-have for professional builders and site managers.”

Efflock – Efflorescence Protection Additive

Efflock is a concrete and mortar additive that prevents moisture ingress and efflorescence—trusted by professionals across NZ.

Available in:

• 1L, 5L, and 20L containers

Use in:

• Exterior plaster render

• Tile adhesive & grout

• Brick mortar

• Stone masonry

• Precast concrete products

“Repels damp, improves durability, and keeps surfaces clean”

Shop Online at Southtile Ecommerce

Find everything you need for bricklaying and masonry work in one place.

• NZ-wide delivery

• Competitive pricing

• Expert support for trade and DIY customers

“Browse Mortar Additives & Cleaners”

FAQs About Mortar Additives & Efflorescence

Q: What is efflorescence and how do I prevent it?

A: Efflorescence is a white, powdery deposit caused by moisture drawing salts to the surface. Additives like Efflock prevent this by repelling water and sealing pores.

Q: Can I use Air Flex with all types of mortar?

A: Yes. Air Flex is compatible with most cement-based mortars and improves workability without compromising strength.

Q: Is hydrochloric acid safe for all masonry surfaces?

A: It’s effective but strong—use with care on delicate surfaces and always follow safety guidelines.

Q: How do I choose the right oxide colour?

A: Match to your existing mortar or desired finish. Our team can help you select the best oxide for your project.

Q: Can Efflock be used in tile adhesive?

A: Yes. Efflock is suitable for tile adhesive, grout, and other cementitious products to prevent moisture-related issues.