Bostik vs Fosroc:Which is more popular?
In September 2026, Bostik had more branded searches than Fosroc among waterproofing brands in New Zealand. Bostik had about 390 branded searches, while Fosroc had 140. Bostik made up 16% of all waterproofing brand searches we track, and Fosroc accounted for 5.7%. When we asked ChatGPT and Google AI Overviews about waterproofing brands, Bostik appeared in one of the five answers and Fosroc in none.
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Top waterproofing brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and 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. Fosroc did not appear in any of the five answers.
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 Fosroc more popular in search?
This chart shows how often people search Google for Bostik and Fosroc 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, Fosroc. 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 Fosroc comparison changed over the last 12 months?
3 findings
- Bostik was ahead of Fosroc 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, Fosroc’s share of searches among waterproofing brands in New Zealand moved from 5.4% to 5.7%, and its estimated monthly branded searches held steady at 140.
How did search popularity change for New Zealand waterproofing brands in September 2026?
3 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%.
In September 2026, Fosroc lost share of searches among waterproofing brands in New Zealand, from 7.3% to 5.7%.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Bostik’s and Fosroc’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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