Gloria 410T - Vs - Gloria 510T pump sprayers and alternatives

I am going to purchase a quality sprayer and have been looking at the Gloria range.

410T - is a 10L Steel polythene lined pump sprayer at around £240

510T - is a 10L STAINLESS steel pump sprayer at around £310

Of course both come with Viton seals etc.

I am wanting it for sealing patios, driveways etc - when talking to a dealer today he says as long as you clean them properly with Xylene after each use they will last a lifetime.

Now I don't mind spending on quality tools and these seem to be top end of their game. Is anyone here using them or have experience with them?

Are you using an alternative that is a serious contender or better?

All advice greatly appreciated.

I have the 510T and it works great, takes some pumping up though!

I use it for sealing, hypo, UBIK, weedkiller etc and have never had a problem, just wash it out with thinners after sealing and job done.

The Chapin extreme industrial sprayers are pretty good also. Worth a look I have one and use it for everything. Haven't used the Gloria though.