Recommended Butyl Tape And Sealant For Installing A MaxxAir RV Roof Vent

Question:

When installing a Maxxair roof fan/vent, what size butyl tape and sealant around the vent do you recommend?

asked by: Steve W

Expert Reply:

I recommend the Alpha Systems Butyl Tape for RV Weatherproofing # AL28FJ as it's 1" wide to fully cover the flange of your vent. Make sure you overlap the ends to form a tight waterproof seal. You can see me doing this at 2:50 mark in the attached video below.

As for the sealant, I recommend the Alpha Systems 1021 Self-Leveling Sealant for RVs # AL98KV. One tube of this will be enough to fully cover the screws and layer it down to the roof to ensure you don't have a water leak.

expert reply by: Kevin C