sealong perspex windows

[tangerine]

Hi, Can anyone suggest a suitable sealant for perspex windows onto GRP .There are lots to choose from at the big stores,but is it necessary to use a special type for use in a seawater environment?

 

[chippysmith]

Sikaflex is the most probable sealant and I am sure someone will be along shortly with the correct grade soon.

I changed mine this time last season but used a foam type self adhesive foam, I did introduce a stainless steel pressure bar system to better distribute the clamping forces and I also used polycarbonate. No leaks so far and very pleased with the overall result

 

[jfm]

It's worth using the right one. If you want it to serve as just a sealant you can use silicone. But if you want it to serve as an adhesive+sealant use sika 291, or 292 if you want a stronger bond. All depends on the exact job, there is no universal answer

 

[boatbuilder]

The most important thing is the correct primers, in order to get the job right. Look at the sikaflex site, all the answers are there.

 

[tangerine]

I should have pointed out I guess that I am using screws to locate the perspex,and required a sealant,rather than an adhesive.

 

[dkm]

I used B&Q outdoor translucent sealer 2 years ago and very pleased with resullts