top of page

Maxx Fan Installation Method

The best waterproofing method when installing a MaxxFan Vent that Swan River Van uses?

​

​

Step 1 — Butyl Tape (Primary Seal)

​

Before placing the MaxxFan Deluxe 7000K Roof Vent on the roof:

  • Run butyl tape around the entire underside of the fan flange.

  • When the fan is screwed down into the internal Aluminium backing frame, the butyl compresses and squeezes out, creating a waterproof gasket.

Why this matters:

  • Butyl never fully hardens

  • It stays flexible as the van roof moves

  • It fills small gaps in curved metal roofs

 

Step 2 — Sealant (Secondary Seal)

​

After the fan is screwed down:

  • Apply Sikaflex 522 sealant

  • Run a bead around the outside edge of the flange and screw heads

This protects the butyl from:

  • UV damage

  • Dust and water ingress

​

Step 3 — Aluminium Buytl Tape Finish (Final Seal)

​

  • The Ultimate UV Shield:  Some sealants eventually succumb to the Australian sun. The aluminium backing is a 100% UV block, meaning the sealant underneath stays "fresh" and flexible indefinitely.

  • Mechanical Protection: It adds a layer of abrasion resistance against low-hanging branches or debris that might scrape across your roof.

  • Thermal Stability: The reflective surface helps prevent the sealant from getting too hot, which reduces the expansion/contraction stress on the bond

  • Looks:  A nice clean finish​

​

bottom of page