Koster 21 – Liquid applied waterproofing coating – 20kg

: £132.00
£110.00 £132.00

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Koster 21 – 20kg (Coverage Up to 7M2 @ 2 Coats)

Koster 21 is a 2 component, liquid applied multi-purpose waterproofing coating, elastic, crack bridging, solvent free – and can be applied to dry or damp and moist substrates.

Koster 21 is liquid applied and therefore seamless. This means that there are no joints which are often a weak point for sheet applied waterproofing system. It also means it’s perfect to apply when there are complicated architectural details.

Koster 21 is typically used to waterproof podium decks, balconies, buried roof and also tricky areas such as external solid stairs.

It’s UV stable and trafficable to light foot traffic. It can therefore be left exposed with a pure brilliant white colour.

Reflects sunlight and reduces building surface temperatures. Suitable for indoor and outdoor use.

Koster 21 is free from volatile organic compounds and does not have a strong odour making it ideal for use near where people are working or living.

Weight25 kg

Click to open and download:

Data Sheet KÖSTER 21

1 review for Koster 21 – Liquid applied waterproofing coating – 20kg

  1. Tony J

    Great product. Easy to install. I used it to waterproof the outside of solid concrete stairs at the front of a georgian townhouse. Worked really well. Very bright white in colour.

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