ThistleKop
Yes, that is the modern replacement for roofing felt or underlay.
Generally specked for the overhangs and eaves as an ice guard as it become virtually leak proof.
Since it is so simple to Install I suggest that for the mere cost of materials that one should do his entire roof as it will result in an 'ultra roof job' that should never leak.
Once rolled out and exposed to a half hour of direct sun you literally will tear off a lamination of plywood or waferboard if you try to peel it back.
They are now laying this stuff down on new concrete floors under the furring strips that support the subfloor as the ultimate vapor barrier.
For the tractor application, you'd want a clean, dry and warm surface for it to adhere.
Try to find the origional product made by Grace as it is a smooth finish and will accept a paint.
Most of the others are a sandy (non slip surface) and black.
All , however are based on about a 3/32 thickness of uncured rubber material with a self adhering back.
They all have a paper or plastic 'tear off' backing to protect the adhesive.
150 sq ft runs generally in the $60 range in Canada.
Probably $45.ish in the US