I’ve been experimenting with different duct sealing methods to boost energy efficiency in HVAC systems. Recently, I used mastic on a few projects and it seems to hold up better than tape, especially in high-pressure areas. What techniques do you all find most effective for minimizing leaks?
I’ve had good luck with aerosol sealants for tight spots — it’s like giving your ducts a spa day! Have you tried that approach, or do you mostly stick with mastic and tape?
Mastic definitely holds up better, but I’ve found that using a combination of mastic and metal tape can be a game-changer, especially for tough spots. It’s like giving your ducts a double layer of armor! Have you thought about checking the insulation too?
I’ve had some success using a brush to apply mastic, especially on uneven surfaces. It really gets into the nooks and crannies that tape might miss. Ever thought about combining it with metal tape like @liang_chen93 suggested? That could really make the seals hold up under pressure.