Kalpataru is the flagship door brand of V.K. Patel & Company and has more than 40 years of experience. It manufactures moulded panel, flush and lead-lined doors, fire-retardant plywood, and complete door solutions. Its fire-retardant doors come in 30, 60, 90 and 120-minute ratings, are tested to IS 3614 and BS 476, and can be finished in paint, primer, veneer or laminate. It is licensed by the Directorate of Maharashtra Fire Services as a passive protection agency (licence 2025/RP-70).