you have to seam seal it yourself that would be a big no no for for me.
I seem to take a belt-and-braces approach and seam-seal the outsides of even my taped seams. Absent taped seams, I seal both the inside and outside, and inspect the tent bottom and flysheet at the start of every season, doing touch-up as necessary.
It beats being unexpectedly wet, but -- My! -- it sure
is a hassle; agreed!
I do notice the Scarp 2 uses siliconized nylon, with which I have had mixed results. It is extremely light, can be user reapplied/reactivated, and doesn't rot/mildew as quickly or in the same way as urethane coatings. Those can be big pluses. However, I've noticed it does have drawbacks, depending...:
• The inner surface is really slick, so if one camps on a slope, it is possible to awaken on the other side of the tent, having slid there.
• In heavy downpours and wind-driven rain, there can be some "misting" inside.
• The silicone can transfer to sleeping bags, pads/mats, and fingers...the last being of issue if you are a contact-lens wearer; it changes the surface tension at the lens and tears bead up instead of spreading smoothly across the lens -- ouch. This was a problem for me, and has caused me to also avoid siliconized-nylon stuff sacks and compression sacks as well. The MSDS (Materials Safety Data Sheets) for similar silicone fabric treatments state it can remain in the outer dermal layers of skin/fingers for as much as 90 days after direct contact and is transferable, so protective gloves are advised for contact-lens wearers. Not a problem for most, but it seemed worth noting if contact lenses are in use. Most people never think about it as a source of lens discomfort. A touring partner found the more he toured, the redder his eyes became and the more uncomfortable his contacts. Once he replaced his tent with one that used urethane-based waterproofing on floor and flysheet -- problem solved.
Contact lenses aside, siliconized fabrics have opened up a whole range of ultralight design possibilities for outdoors gear, and can be an appropriate choice if the drawbacks aren't a problem for your own use.
All the best,
Dan.