Sika NZ

Sika BlackSeal® Elastic

The easy way to waterproof basement walls in Kiwi houses

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BlackSeal Elastic is a waterproofing membrane you simply paint on to the exterior of any concrete or masonry, below-ground basement walls. It prevents moisture seeping through basement walls which is a very important safeguard when building a new home.

If left untreated, moisture can seep through a concrete or masonry basement causing damage to the structure and creating a damp, unhealthy living environment. You only get one shot at below ground basement waterproofing. Once the backfill goes in, any potential water damage problems are buried...literally. Don’t take the risk - use BlackSeal Elastic, New Zealand’s only BRANZ appraised paint-on waterproofing membrane.