Sealant

[tomag]

My Maxxair fan is leaking so i am going to remove it and reseal it ,my question is is it best to use a non drying bedding sealant or what would you guys recommend

 

[RM_Marine]

Mine is fitted onto a wide strip of non setting bedding tape it's been OK at the moment

Something like this.....

Sealants & Tapes - IDL Mastic - Sikaflex | Leisureshopdirect

Sealants and tapes for repair, refurbishments and maintenance of caravans and motorhomes. Seelastik, silicone, gelcoat filler; Sikaflex 512. from Leisureshopdirect

www.leisureshopdirect.com

 

[HKF]

Sikaflex

 

[scotjimland]

never use an adhesive such as Sika, it has it's uses for bonding walls etc, but not for roof light or window sealing ..

use a non setting mastic such as Carafax IDL

 

[Mixyblob]

never use an adhesive such as Sika, it has it's uses for bonding walls etc, but not for roof light or window sealing ..

use a non setting mastic such as Carafax IDL

Could you please explain why this is true.

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[scotjimland]

Could you please explain why this is true.

indeed..

if the window has to be removed for any reason, an adhesive such as Sika is nigh on impossible to remove without damaging the frame..

I had to reseal a roof light that had been fitted with Sika, it took me hours to release the frame and clean the roof.. scraper and solvent required.. not only that, I cracked the frame and had to buy a new window..

also, the roof and window frame expand and contract at a different rate.. this can cause an adhesive to crack and eventually leak..

this is a good video by Dave Newel .. aka Diamond Dave ..motorhome expert



part two

 

[Speve]

This good for the price on Amazon

I’ve just done one of my roof lights with it.

 

[HKF]

indeed..

if the window has to be removed for any reason, an adhesive such as Sika is nigh on impossible to remove without damaging the frame..

I had to reseal a roof light that had been fitted with Sika, it took me hours to release the frame and clean the roof.. scraper and solvent required.. not only that, I cracked the frame and had to buy a new window..

also, the roof and window frame expand and contract at a different rate.. this can cause an adhesive to crack and eventually leak..

this is a good video by Diamond Dave ..motorhome expert

I'm not disagreeing with you, just repeating what the blurb says about SikaFlex. It says it allows for thermal movement. I thought, probably wrongly (because I usually AM wrong!), that that's what would be needed.

Also, It was recommended to me on this forum to use SikaFlex on my roof because the previous sealant had failed and it needed to be re-done.

 

[scotjimland]

I can only advise what and why I use it. and why it is recommended by people like Dave Newel

repeat , if you ever have to remove the window..you'll wish you hadn't used Sika

 

[Mixyblob]

I can only advise what and why I use it. and why it is recommended by people like Dave Newel

repeat , if you ever have to remove the window..you'll wish you hadn't used Sika

I once removed a 30x30cm aluminium plate from the roof of my Hobby 700. It was used to mount a satellite dish. I spent about 3hrs trying to remove it with very little success, using a variety of tools. I was getting rather peed off with it so I phoned the previous owner to ask if he knew what was used to stick the plate to the roof. Stixall was his reply. Since then, it all I've ever used to fit/seal windows, skylights, solar panels etc to my self builds.
But, as in your kind explanation, even though it works, its not necessarily the best stuff for a given aplication.
It won't stop me using it though.

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