Bracket prep for panels (1 Viewer)

[gus-lopez]

Installing 2 panels on the new van. Aluminium angle is powder coated .What would best, just to clean it & rough up before using sikaflex or removing the powder coating completely ? Thanks in advance.

 

[Two on Tour]

As long as the powder coating is sound, then roughing the surface to be bonded is fine.

 

[Paddywack]

Don't forget to use the Sikaflex primer.

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[Dazzlin]

It's surprising how little prep you need for a good adhesive.
Prep as much as you can, then slap a load of adhesive on. Look forward to a catchup when we are down there.



If the panels stick......

 

[Just smiffy]

Did you have the Ali angle powder coated or did you buy like it..? I’m sure I’ve seen powder coating coming off Ali after a short time because it reacts... I think the coating stays in one place and acts as a cover over the Ali if you know what I mean but separates .....? I’d do a bit of research on it first Richard ....

 

[walburga]

Drill several extra holes through the brackets...let the adhesive mastic seep through these holes, this will increase the bonding effectiveness.

Allen

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[gus-lopez]

Did you have the Ali angle powder coated or did you buy like it..? I’m sure I’ve seen powder coating coming off Ali after a short time because it reacts... I think the coating stays in one place and acts as a cover over the Ali if you know what I mean but separates .....? I’d do a bit of research on it first Richard ....

It is a supplier of aluminium extrusions used here for windows, doors, patio doors, roller shutters ,etc; Never seen it come off of any in all the years I've been here & used the stuff. Off the shelf in many colours. Unfortunately plain ali isn't available locally. I might, just might also use a couple of screws seeing as it is a pvc anyway & the roof lights are glued/screwed.

 

[Littlewheels]

Drill several extra holes through the brackets...let the adhesive mastic seep through these holes, this will increase the bonding effectiveness.

Allen

Spot on,definitely the thing to do.

 

[The Wino]

Spot on,definitely the thing to do.

Presumably you could also put in some self tappers where the adhesive is going for the same reason.

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[Littlewheels]

Presumably you could also put in some self tappers where the adhesive is going for the same reason.

Self tappers assist in making sure you have enough adhesive between the bracket and the roof, if the head of the screw is 3mm deep the adhesive will be 3mm thick as they stop the adhesive being squeezed out.

 

[gus-lopez]

3mm tile spacers was my plan

 

[Lenny HB]

I would clean the powder coating completely off the contact area. Powder coating only needs a chip in it and moisture will get under it and the whole coating will start to flake off. As you are using cut pre-coated extrusion it's already got a head start with the bare ends.

As said drill at least 3 x 6mm holes in the brackets also if you use stainless nuts & bolts don't forget to put a coating of silicon grease or Evostick on the bolts and nuts to stop direct contact with the aluminium of the frames.

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[The Wino]

3mm tile spacers was my plan

The tip I saw somewhere was discs cut from flexible hose the idea being that they allow the depth of sealant to be set but allow slight movement for expansion and vibration