Below-ground waterproofing has traditionally relied on barrier systems applied to the outside of a structure. While membranes remain an essential part of the solution, the industry is increasingly recognising the value of integral waterproofing — where the concrete itself becomes part of the waterproofing system.

Allco is proud to introduce CP10, a high-performance crystalline concrete admixture that transforms concrete into a water-resistant barrier from within.

Waterproofing built into the concrete

Added directly to the concrete mix, CP10 works through a crystalline reaction within the concrete matrix. These crystals grow inside the pores and capillaries of the concrete, sealing potential pathways for water ingress. The result is a structurally integral waterproofing solution, classified as Type B protection under British Standard BS 8102:2022.

By becoming part of the concrete structure itself, CP10 provides long-term protection against water ingress, chemical attack, and deterioration, helping extend the durability and performance of below-ground structures.

Integral waterproofing systems offer several key advantages:

• Internal protection: Waterproofing is built into the concrete matrix
• Improved durability: Resistance to water ingress and aggressive environments
• Reduced long-term risk: Protection remains active throughout the life of the structure
• Compatibility with other waterproofing methods: Ideal for combined system approaches

When used alongside Allco external membrane systems such as Volclay, CP10 contributes to a dual waterproofing strategy, combining Type A (barrier protection) with Type B (integral protection). This layered approach significantly reduces the risk of water ingress in critical applications such as basements, lift pits, and underground structures.

A complete below-ground waterproofing solution

With the addition of CP10, Allco now offers a comprehensive below-ground waterproofing portfolio that includes both membrane systems (Type A) and integral concrete solutions (Type B).

By bringing together proven membrane technologies and advanced concrete admixtures, Allco continues to strengthen its position as a leader in below-ground waterproofing solutions in New Zealand, supporting architects and engineers with reliable, durable, and well-integrated systems.