About Us

Founded in 1983, Tosin began with expertise in rubber material development, supplying high-quality materials to manufacturers across Taiwan.

As Taiwan’s global trade expanded, we also established an export trading company to deliver world-class products made in Taiwan.

In 1988, Tosin entered rubber product manufacturing to meet growing demands for quality.

With over 40 years of experience, we continue to strengthen our four core capabilities:
Material Development · Mold Manufacturing · Sample Realization · Stable Mass Production

Tosin remains committed to advancing production technology and delivering stable, high-quality rubber products to customers worldwide.

Milestone & History

1983

Established-1983

Tosin established. Providing rubber compound and technical service.

1986

1st plant_1

Set up“ Leasun Trade Corp.” to export rubber products.

1988

Curing_old_1

1st plant started mass production.

2000

BSI Mark ISO-9001

Got ISO 9001 approval.

2005

WRAS Logo

EPDM 60&70 got NSF & WRAS approval.

2006

BSI Mark IATF 16949

Got TS 16949 approval.  Started to produce automobile products.

2014

D & B

Got D&B 1000 Taiwan SMEs award.

2017

2nd plant_1

2nd plant started mass production.

2019

KTW LOGO

EPDM 60&70 got ACS / KTW / W270 approval.

2024

Tosin SCADA DEMO

Focus on making all equitment IoT.