Bostik vs Sika:Which is more popular?
In September 2026, Bostik had more branded searches than Sika among waterproofing brands in New Zealand. Bostik had about 390 branded searches, while Sika had 10. Bostik made up 16% of all waterproofing brand searches we track, and Sika accounted for 0.41%. When we asked ChatGPT and Google AI Overviews about waterproofing brands, Sika appeared in four of the five answers and Bostik in one. Sika was mentioned before Bostik in every answer.
Who do people search for more?
Bostik, about 39 searches for every 1 for Sika
Who does AI mention more?
Sika, mentioned in 4 of 5 answers, Bostik in 1
Who does AI recommend more?
Sika, named ahead of Bostik in every answer
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Top waterproofing brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Sika was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Bostik was mentioned in one out of five: in one of the three ChatGPT answers, but not in either of the two Google AI Overviews. Sika was listed before Bostik in every answer.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
Ardex4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers- Sika4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Mapei2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Nuralite2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers- Bostik1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Fosroc0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about waterproofing brands
5 answers
Asked ChatGPT
“Which waterproofing brand should I buy in New Zealand?”
Asked ChatGPT
“What are the best waterproofing brands in New Zealand?”
Asked ChatGPT
“What's the best waterproofing brand in New Zealand for building and repair?”
Searched Google, AI Overview
“waterproofing nz”
Searched Google, AI Overview
“concrete waterproofing”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in New Zealand on October 21, 2026.
Is Bostik or Sika more popular in search?
This chart shows how often people search Google for Bostik and Sika by name. Each line represents a brand's share of searches for all six waterproofing brands we track, month by month, from searches in New Zealand.
Share of searches by month for Bostik, Sika. The figures are in the table below the chart.
View monthly share of searches table
| Month | Ardex | Mapei | Nuralite | Bostik | Fosroc | Sika |
|---|---|---|---|---|---|---|
| Oct 2025 | 28% | 23% | 28% | 15.2% | 5.4% | 0.39% |
| Nov 2025 | 29.3% | 19.5% | 29.3% | 15.9% | 5.7% | 0.41% |
| Dec 2025 | 28.2% | 22.9% | 22.9% | 18.8% | 6.5% | 0.59% |
| Jan 2026 | 31.1% | 20.5% | 25.3% | 16.8% | 5.8% | 0.53% |
| Feb 2026 | 29.9% | 24.5% | 24.5% | 16.2% | 4.6% | 0.41% |
| Mar 2026 | 35.3% | 19.3% | 23.7% | 15.7% | 5.6% | 0.4% |
| Apr 2026 | 33.5% | 22.3% | 22.3% | 14.9% | 6.5% | 0.47% |
| May 2026 | 29.8% | 19.8% | 24.4% | 19.8% | 5.8% | 0.41% |
| Jun 2026 | 28.5% | 23.3% | 23.3% | 19% | 5.5% | 0.4% |
| Jul 2026 | 30.1% | 20.1% | 24.7% | 20.1% | 4.6% | 0.42% |
| Aug 2026 | 25.4% | 20.7% | 25.4% | 20.7% | 7.3% | 0.43% |
| Sep 2026 | 29.5% | 24.2% | 24.2% | 16% | 5.7% | 0.41% |
How has the Bostik and Sika comparison changed over the last 12 months?
3 findings
- Bostik was ahead of Sika in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Bostik’s share of searches among waterproofing brands in New Zealand moved from 15.2% to 16%, and its estimated monthly branded searches held steady at 390.
- Across the 12 months ending September 2026, Sika’s share of searches among waterproofing brands in New Zealand moved from 0.39% to 0.41%, and its estimated monthly branded searches held steady at 10.
How did search popularity change for New Zealand waterproofing brands in September 2026?
2 changes
In September 2026, Mapei overtook Nuralite and Bostik to rank 2nd among waterproofing brands in New Zealand, with 24.2% of the searches.
In September 2026, Bostik lost share of searches among waterproofing brands in New Zealand, from 20.7% to 16%.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Bostik’s and Sika’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
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