THAILANDSICThailand Standard Industrial Classification

TSIC Activity

43291

Insulation installation

ประกอบกิจการรับเหมาหุ่มฉนวนความร้อนและความเย็นภายในอาคาร โรงงาน สำนักงาน

What this activity covers

Companies in this sector install and maintain various types of insulation in buildings and civil engineering structures.

  • Insulation installation — Installation of insulation in buildings and structures
  • Insulation repair — Repair and maintenance of existing insulation
  • Heat insulation — Installation of heat insulation materials
  • Sound insulation — Installation of soundproofing materials
  • Vibration insulation — Installation of vibration insulation solutions
  • Fire protection insulation — Insulation related to fire safety
  • Pipe insulation — Insulation for hot and cold water pipes and boilers

What companies here also do

Seen in real company registrations under this code — beyond the official definition, so licensing may differ.

  • Consulting services — Advisory services for insulation projects
  • Equipment sales — Sales of insulation-related equipment
  • Training services — Training on insulation installation techniques

Foreign ownership

List 3: Restricted, FBL/BOI route availableinherited from 43

Construction, except construction of infrastructure providing basic public services in public utilities or transport that requires special apparatus, machinery, technology or expertise, and except other categories prescribed in ministerial regulations

The infrastructure carve-out is subject to a minimum foreign capital requirement, subject to capital thresholds, verify current figures.

FBA B.E. 2542, List 3 (10)Routes: Foreign Business Licence, BOI promotion, US Treaty of Amity

Auto-mapped, verify against the Act. These TSIC mappings are indicative, not legal advice; the schedules of the Foreign Business Act B.E. 2542 are the authority. See the full foreign ownership reference.

Industry at a glance

as of 23 ก.ค. 69

The whole registered industry under this activity, every registration year, from the DBD DataWarehouse.

208
active companies operate here
฿481.5Mregistered capital, combined
฿2.5B
Sector revenue · 2025
-4% since 2023
฿5.1M
Net profit · 2025
100 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
0%of new registered capital is foreign-held
฿0 foreign฿9.4M Thai

Based on few new registrations this year — read as a rough signal only.

New in 2026

6-14.3%

registrations, YTD

Registered capital

฿481.5M+5.9%

since year-end

Largest by revenue

Latest filed-year revenue, not a multi-year total

  1. 1Thai Nichias Engineering Co., Ltd.฿536.4M
  2. 2Square Panel System Co., Ltd.฿392.0M
  3. 3AC Wall Inter Group Co., Ltd.฿156.9M
  4. 4Professional Insulation Co., Ltd.฿121.1M
  5. 5Plus Industrial Plant Service Co., Ltd.฿71.9M

Largest by registered capital

  1. 1Square Panel System Co., Ltd.Bangkok฿52.0M
  2. 2Foster (Thailand) Co., Ltd.intlBangkok฿25.0M
  3. 3Cape East (Thailand) Co., Ltd.Rayong฿20.0M

Source: Department of Business Development DataWarehouse. Financial figures are combined totals of companies that filed statements; revenue and profit shown for the latest three reporting years.

Companies registered since 2022

Browse all

New DBD registrations under this activity since 2022, the period the registry snapshot covers, not the full historical register.

45
Registered
since 2022
44
Still active
1
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2022peak 13 in 20232026

Largest active companies by registered capital

Source: Department of Business Development (DBD) new-registration records, 2022 to present. Counts cover companies first registered in that window, reflect the latest snapshot load, and may lag the live register.

Emerhub

Restricted activity? There is usually a route.

Emerhub structures foreign-owned companies around FBA restrictions: Foreign Business Licence applications, BOI promotion, and compliant shareholding structures. Talk through your case before you commit to one.

Talk to Emerhub Thailand