Exterior corner block sealing

[cforsythe]

Hello

On the exterior of my house, there are decorative corner blocks designed to create a corner effect. However, instead of being a single, continuous piece wrapping around the corner, they are separate pieces on each side, leaving a small gap that exposes the actual corner of the house.

At some point in the past, someone applied a sealant to the horizontal and vertical gaps between the corner blocks. However, the sealant is now deteriorating and peeling away, allowing water to seep in behind.

I plan to remove the old sealant and clean the joints — but what brand and type of sealant would be best suited for this application?

Thanks

 

[jj4091]

Stick on decorative quoin stones would normally be pointed up with the adhesive used for fixing them. So any thing that stays flexible.

 

[cforsythe]

Would you any recommendations on a brand / range? These corners are exposed to sun, wind and rain.

There is such a large range, from one supplier I had been looking at :-

- Soudal Fix ALL Flexi Sealant & Adhesive,
- HA6 Marine Silicone Sealant,
- Soudal Grip ALL Hybrid Polymer Adhesive,
- Bond-It PU18 Polyurethane Sealant & Adhesive,
- GB Pro Advanced Polymer Adhesive Sealant
- CT1
etc

Happy to take a recommendation based on experience of any other brand / type.

Thanks

 

[^woody^]

If those quoins are painted, you will need an acrylic mastic or better still a polymer mastic, anything else and paint won't stick - check the product data sheets. You don't need specific adhesive products, and again check the product data sheet for adhesives to confirm UV resistance

You may be better off with a trowelled mastic product, as this may be easier to apply and you will get a better finish and be more economical.

 

[cforsythe]

Thanks for your help