once P&S applied on roof, do i need to apply a roof sealant such as siliconizer for extra protection or P&S good enough?

Peel & Seal should be good enough in general. I applied it to a flat RV roof, and it worked great for many years. I sold the trailer last year, so can only vouch for 5 years of durability. The only issue I had were with the overlapping seams losing their adhesive seal. I simply went over it with a heat gun to melt the polymers again, running a rag over to smooth it and reseal it. It probably wouldn't hurt to apply a sealer on top if it, but I don't think it is necessary. P&S has about 5 layers of foil and polymers with tar that make it pretty tough and a strong barrier to punctures and leaks.

How long is the 36" wide roll ?

the roll is 36" wide and approximately 33 feet long.

I have a tar and gravel roof. Could I remove the loose stones and apply this on top of that surface?

No, roof must be smooth and clean. I had to remove rocks and all the old asphalt down to the deck. Base layer then use this as the top layer.

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MFM Peel & Seal Self Stick Roll Roofing (1, 36in. Gray)

Product ID: 19172138

Details

Brand
Mfm Building
Color
Granite Gray
Material
Aluminum
Number of Items
1
Special Feature
Self-Adhering

📏36in wide roll for broad coverage

🔥Heat & water resistant for durability

🛠️Self-adhering, no special tools needed

2166.94 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Seal your space with confidence—roofing made simple!

MADE IN THE USA - Quality you can trust, built to last.
PRECISION APPLICATION - 36in wide with 3in guide lines for perfect cuts.
DURABLE WEATHER SHIELD - Reflects heat and resists cracking over time.
EFFORTLESS INSTALLATION - Peel, stick, and seal—no mess, no fuss.
VERSATILE SURFACE COMPATIBILITY - Works on metal, RVs, gutters, and more.

MFM Peel & Seal Self Stick Roll Roofing is a 36-inch wide, 33.5-foot long aluminum composite roll designed for easy, tool-free installation on multiple surfaces. Its patented self-adhering rubberized asphalt backing ensures a durable, heat- and water-resistant seal that won’t crack or dry out. Ideal for roofs, vents, gutters, and more, this U.S.-made product meets ASTM D 1970 standards, delivering professional-grade protection with minimal effort.

Specifications

ASIN	B000HE7RYQ
Adhesive Format	Wide Roll
Adhesive Location	Full Surface
Best Sellers Rank	#621,518 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #395 in Roof Flashings
Brand Name	Mfm Building Product
Color	Granite Gray
Compatible Material	Metal
Customer Reviews	4.3 4.3 out of 5 stars (77)
Item Resistance	Heat Resistant, Water Resistant
Item Weight	29 Pounds
Manufacturer	MFM Building Products
Material Type	Aluminum
Model	50G36
Number of Items	1
Other Special Features of the Product	Self-Adhering
Part Number	50G36
Size Name	36 In. x 33-1/2 Ft.
UPC	725799504361
Unit Count	1.0 Count

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