Mortein Brazil Hid Cockroaches Inside a Magazine to Sell Pest Control

The Strategic Logic Behind Havas's Invisible Insect Approach for Mortein Brazil

Mortein built its campaign strategy on a simple but durable consumer insight: the anxiety around household pests is rooted not in seeing them, but in knowing they are there without seeing them. The hidden cockroach is more unsettling than the visible one. Havas Worldwide São Paulo translated that psychological reality into a media mechanic, making the act of reading a magazine replicate the experience of discovering an infestation.

In the Brazilian pest-control market, Mortein operates in a competitive environment where category communication tends toward direct demonstration — spraying, dying insects, clean surfaces. Brands such as Raid, owned by SC Johnson, and SBP, a longstanding local competitor with deep distribution across Brazilian retail, have historically used graphic efficacy as their primary creative register. Mortein's decision to pursue concealment rather than spectacle represents a deliberate repositioning of the category's creative grammar, prioritising the emotional trigger of discovery over the rational trigger of proof.

The print medium was not an inherited constraint but a strategic instrument. Magazine readers in Brazil engage with editorial content in a tactile, sequential manner, making page manipulation a plausible and naturalistic interaction. The fold mechanic required no digital infrastructure, no QR code, no secondary screen — only the physical object already in the reader's hands. This simplicity is strategically significant: it ensures the idea travels without degradation across any Brazilian market where the print title circulates. According to Ads of the World, the campaign was publicly catalogued by June 2015, suggesting it entered the international creative conversation within months of its Brazilian launch.

Rodrigo Corbari, Felipe Perles and the Craft of Making Cockroaches Disappear Into Print

Havas Worldwide São Paulo assigned the creative execution to a tightly defined team. Creative Director Rodrigo Corbari led the concept, with Art Director Felipe Perles responsible for the visual architecture and Copywriter Akira Tateyama shaping the campaign's written dimension, according to documentation held at Ads of the World and archived on Clapboard.

The craft challenge was precise. A cockroach sequence needed to be embedded within the physical edge of a magazine page in a manner that remained invisible during normal reading but became fully legible the moment the reader folded or fanned the pages. This required Felipe Perles to work within the dimensional constraints of a printed trim edge, distributing the insect imagery across sequential page surfaces so that the fold created a coherent, recognisable figure rather than an abstracted pattern. The execution demanded exact registration across multiple pages — a production discipline that sits closer to bookbinding craft than conventional print advertising.

Akira Tateyama's copywriting role in a campaign this visually self-sufficient is worth noting. The concept generates its own argument through the reader's physical action, which means any accompanying text had to operate economically — naming the product and its benefit without over-explaining a revelation the reader has already experienced themselves. The single documented media asset suggests the campaign was conceived as a contained, high-craft object rather than a scalable multi-format system. According to Ads of the World, the execution's visual device revealed cockroaches and the Mortein message through page manipulation, with the insect sequence becoming visible specifically at the moment of physical engagement with the printed object.

Measuring the Real-World Impact of Mortein's Hidden Ad in Brazil

No verified performance data for 'The Hidden Ad' is publicly available. Mortein and Havas Worldwide São Paulo have not published circulation figures, brand-lift measurements, sales correlation data, or consumer recall statistics attributable to this specific campaign. The assessment that follows is therefore structural rather than empirical.

The campaign's effectiveness case rests on three observable factors. First, the idea achieved international creative visibility: according to Ads of the World, it was publicly documented within months of its February 2015 Brazilian launch, and according to information archived on Clapboard, it appeared on the 2015 Media Lions shortlist. A shortlist placement at Cannes Lions represents peer validation from the global creative industry, though no Lions win for this campaign has been identified across Cannes Lions, Effies, The One Show, D&AD, Clio Awards, Webby Awards, or WARC records, per Clapboard's research. Second, the single-asset format limits the campaign's inherent reach. Print editions circulate to finite, defined audiences, and one execution — however well-crafted — cannot generate the frequency or penetration of a multi-channel campaign. Third, the mechanic is inherently memorable at the individual level: a reader who discovers the cockroach sequence through their own physical action is likely to retain both the experience and the brand. The Clapboard Score of 63 out of 100 reflects this tension — conceptual discipline and creative ingenuity offset by constrained scale and the absence of verifiable impact data.