Industry estimates project a global condom market worth $6 billion in 2015, or some 27 billion condoms, compared to 20 billion in 2012.
Carex - the brand name of Karex condoms - holds about 15 percent of the global condom market, according to sector analysts.
Other leading brands Durex, marketed by Britain's Reckitt Benckiser group, and Trojan, owned by the US firm Church & Dwight, make up roughly a combined 25 percent.
-- 'Recession-proof industry' --
"It is a recession-proof industry. With growth rates of about eight percent annually, it is here to stay," said Goh, who has a quick smile and gives off a boyish enthusiasm.
About half of Karex's output goes to bulk purchases by governments or international agencies' safe-sex drives, mainly the UN Population Fund and the US Agency for International Development (USAID).
China is a key growth market, as anti-HIV efforts there have accelerated in line with loosening attitudes towards sex.
A Chinese business website in 2011 quoted a former top family planning official as saying 1.1 billion condoms were provided free to users by the government every year.
But religious and social taboos are also slowly being set aside elsewhere in Asia, said Goh.
The largely Catholic Philippines, for example, passed a law in January requiring government health centres to supply free condoms and birth control pills, and mandating sex education in schools.