This master's thesis was conducted at Linköping University in collaboration with a Swedish photography and cinematic light developing company. This thesis investigates the development of Ingress Protection (IP) rated products tailored for the film industry, with a focus on enhancing sealing solutions for specified common critical interfaces. It explores the application of Rapid Validity Testing (RVT) as a practical and efficient tool to support the design and validation of these solutions. A mixed methods approach, including literature review, interviews, industry benchmarking and hands on testing was employed to identify current challenges and best practices. Custom test rigs were designed for evaluating dust and water ingress, enabling real world RVT applications that revealed optimal sealing strategies. The research highlights RVT's value in scenarios where datasheet information is insufficient or where high risk design concepts would typically be dismissed. The findings demonstrate that RVT could accelerate decision making, promote innovation, and enhance reliability in product development. The thesis concludes with actionable recommendations for integrating RVT into Company X’s workflow, including optimized cable entry designs, proposed sealing solutions for future products and general guideline for designing IP rated products.