Sika® BlackSeal® Elastic

Sika® BlackSeal® Elastic

NZ's only BRANZ Appraised liquid-applied membrane!

Sika has over 100 years’ experience in innovative waterproofing solutions. Sika BlackSeal Elastic is our liquid-applied, external basement waterproofing membrane. It’s New Zealand’s only BRANZ Appraised (No. 770 [2012]), 'paint-on', external basement waterproofing solution.

You simply apply Sika BlackSeal Elastic to the exterior of a concrete block wall that is going to be below ground and back filled. It’s easy to apply, free from solvents, fast to cure (touch dry in  1-2 hours, recoat in 4 hours), with great adhesion to masonry and concrete. And because it’s BRANZ appraised, AND a Sika product, you can trust it to do the job it’s meant to.

  • To see how easy it is to apply, watch our 'How to Apply' video.
  • LBPs & Certified Drainlayers – pass a short test and get your 'Applicator Certificate' (restricted to NZ registered Licenced Building Practitioners (LBP's) and Certified Drainlayers (CD's) only).

LBPs & Certified Drainlayers Exclusive Certificate

To renew or complete your Sika BlackSeal Elastic training:
  1. Visit Sika Knowledge Centre 
  2. You MUST register first, or you won't be able to see the course! The course is hidden for those who are not LBPs, Certified Drainlayers, or architects. Enter your details, and choose Tradie or Architect (as appropriate) as your job title
  3. Add your LBP number, CD number or NZIA number.
  4. Once you have passed the course you can view or download your exclusive LBP certificate at any time as it will be automatically saved under your “Profile” in the Sika NZ Knowledge Centre.  You can access it by clicking on the person/account icon in the top right of your screen, and choosing “My Profile”.

If you're not an Licensed Building Practitioner or Certified Drainlayer but still want to see a step-by-step guide on how to apply Sika BlackSeal Elastic, you can watch the video here!