About Seal Tex Seal Tex Inc. has been the leading restaurant service and repair company in the Dallas/Ft. Worth area for the last 16 years. Seal Tex has locations in Austin, Houston, San Antonio, Oklahoma City and Dallas. Seal Tex repairs and maintains non-mechanical equipment in professional commercial kitchens. Gaskets, hardware and "on-site" stainless steel welding are our core business. Custom stainless steel, aluminum and steel fabrication are value added services we also offer.