class-a Logo-Red


PLATINUM HTSA is a high temperature, self-adhering, peel and stick roofing underlayment. It is designed for sloped roof applications to help protect against water infiltration from ice dams and wind driven rain. It combines the GRIPSPOT™ patented slip resistant walking surface with a high strength modified rubberized asphalt peel and stick backing.  HTSA offers premium protection against wind driven rain, snow, ice dams, and water infiltration.

  • GRIPSPOT™ slip resistant walking surface – safer, reduces fatigue
  • Silicone treated split release line
  • High temperature resistant to 260°F(126.7°C)
  • Deck adhesion at 40°F (4.4°C)
  • 180 day UV resistant
  • Synthetic construction to inhibit mold growth
  • LIFETIME limited warrant

Platinum HTSA Meets or exceeds the following code standards: 
ASTM D226-97, ASTM D4869, CAN/CSA A123.3, FBC #FL23090, CAN/CSA A220.1, ASTM D1970, ASTM E108, TDI, RCABC RoofStar, Miami-Dade (pending)

WIDTH36″ (91.4 CM)
LENGTH67 FT (20.4 M)

Test and StandardFT PLATINUM HT-SA
Material Composition
Polyolefin & Modified Rubber Asphalt
36 Rolls per pallet (48” x 48”) I 29 pallets per truckload

1044 rolls per truck
Release Liner TypeSilicone Treated Poly Split Release Liner
Nail Sealability ASTM D1970PASS
Permeability ASTM E96<0.035 Perm
Tensile strength MD I CD – ASTM D1970
112 lbf/in I 100 lbf/in
Tear resistance MD / CD – ASTM D1970
139 lbf I 123 lbf
Low-Temperature Flexibility ASTM D1970
Adhesion to plywood@75°F(23°C) I 40°F(4.4°C)-ASTM D197048 lbf/ft I 15 lbf/ft
Adhesion to Galv metal @75°F(23°C) I 40°F(4.4°C)-ASTM D197055 lbf/ft I 40 lbf/ft
Minimum Thickness ASTM D5147 
41 mils
Thermal Stability ASTM D1970265°F (130°C)
Installation Temperature
40°F (4.4°C) and above
The Data shown above is based on the test averages and independent test reports. There can be a +/-10% variation in the individual test results. This report should not be considered as a warranty for the manufacturer. The manufacturer is not responsible for the misrepresentation or misinterpretation of the data by the reader. Please find out more about the product by calling 1-844-353-9839 or visit

Platinum HTSA Installation Instructions

                                                                                                                   Rev Nov 3, 2020

USE: Platinum HTSA is a high temperature, self-adhering, peel and stick roofing underlayment designed for use as secondary ice and water protection in steep slope (2:12 and greater) roofing applications. It offers premium protection against water infiltration from snow, ice dams, and wind driven rain.  It is designed for use under most primary roofing materials such as residential or commercial metal, mechanically attached concrete or clay tiles, primed cedar shakes, and asphalt or composite shingles.


For best results store Platinum HTSA upright in its original packaging in a well ventilated area at room temperature between 40°F (4.4°C) and 90°F (32°C). If product has been stored at a high temperature above 90°F (32°C) it may become difficult to remove the release liner backing.  To correct this, move product to a cooler location. Once cooled, the release liner can be easily removed.


Platinum HTSA should be installed over a clean, smooth, and dry deck. The deck should also not have any voids, protrusions, damaged or unsupported areas. For re-roofing projects, replace any water damaged sheathing and sweep roof deck thoroughly removing dust, dirt and loose nails. Do not install over old roof covering.


For best results Platinum HTSA should be installed when the air, membrane, and substrate temperature is over 40°F (4.4°C).  Priming is not required when attaching to wood or OSB decks.  Concrete or masonry decks should be primed with a solvent or water based primer that meets ASTM D41 for self-adhesive membranes.  Membrane to be applied in shingle lap fashion working from the low point to the high point of the roof.  Apply the membrane in valleys before the membrane is applied to the eaves.  HTSA is to be laid out horizontally (parallel) to the eave with the printed side up. Horizontal overlaps to be 3” using the flat designated selvage edge.  For best adhesion performance it is recommended to not overlap up onto the Gripspot walking surface. For end laps it is recommended to overlap a minimum of 6” and nail 1” in from the edge along the vertical end lap with 6” spacing between nails. To increase adhesion a primer can be used along end lap. End laps should be offset a minimum of 6 feet on adjacent courses.  Where it is necessary to overlap Platinum HTSA onto the Gripspot walking surface such as over the ridge it is recommended to cap nail along the outer edge 1” in at 6” intervals.  Note if underlayment will be left exposed for an extended period in high wind areas it is also recommended to nail along the outer edges of the roof along the rake or eave.

For easier installation, it is recommended to cut the membrane into manageable lengths. Then peel back one side of the split release liner and apply in position on the roof deck and then press in place by hand or with a weighted roller to increase adhesion to the deck.  Once one side has been pressed to the deck peel back the remaining half of the release liner and press down to adhere to the roof deck again using a weighted roller to increase adhesion.  For improved adhesion hand rolling over the selvage edge and directly above the selvage edge using a weighted roller is recommended. If a roller is not available or not considered safe, walk on all laps, and as much of the field area as possible.


For Cold Weather Applications 40°F (4.4°C) or below, a primer should be used and the upper most  selvage edge blind nailed using 3/8” head roofing nails 1” or longer.  Space nails along edge at 12” intervals using the marked locations. For best results, allow Platinum HTSA to ambiently warm to room temperature prior to application.

For Steep Slope Applications (5:12 or greater), high wind areas, or when installing at temperatures greater than 100°F (38°C), it is recommended to blind nail the selvage edge area as per above under cold weather application.

Platinum HTSA should be applied under the metal drip edge along the rakes and over the metal drip edge along the eaves unless otherwise specified by local building codes.  Do not fold Platinum HTSA over the roof edge unless the edge is to be subsequently covered over by a drip edge or other flashing material.

In areas where ice damming can occur, install Platinum HTSA from the eaves up the roof to a point not less than 24 inches inside the exterior wall, measured horizontally. Consult your local building code for specific requirements.

For valley applications, peel the release liner; center the sheet over the valley and hand press in place from the center of the valley outward. Note: It is very important Platinum HTSA stay in contact with the roof deck into and out of the valley area. Platinum HTSA should never be suspended or bridge a valley. It is recommended to follow up with a weighted roller or by walking on the surface. Give special attention to ALL perimeter edge areas.

Repair holes, fish mouths, tears, and any other penetration damage to the membrane with a round patch of membrane extending passed the damaged area by 6 inches in all directions. Do not install fasteners through membrane over any unsupported areas of the structural deck, such as over joints between adjacent structural panels.


Platinum HTSA is a moisture and vapor barrier and therefore must be installed above a properly ventilated space(s). Follow ALL building codes applicable to your geographical region and structure type. HTSA is not designed for indefinite outdoor exposure. Final roofing should be installed within 180 days of underlayment installation.

CAUTION – Read Good Safety Practice Below

As with any roofing product, always follow safe roofing codes & practices (OSHA) and always use and wear fall protection devices when working on roofs. Release liners are slippery and should be removed from work area immediately after application. Use caution when walking or standing on Platinum HTSA as slip resistance may vary with surface conditions, weather, footwear and roof pitch. Failure to use proper safety gear and footwear can result in serious injury.


PLATINUM HT-SA Dual logo program

Our PLATINUM HT-SA Dual Logo Program is an easy marketing tool and receive majority branding alongside our own logo and contact information. You’ll be recognized in the community as a leader in sustainable roofing practices and gain valuable exposure for your business.

Contact Us

We are here to help and answer any questions you may have. We look forward to hearing from you. Please allow 24 hours for us to reply!

Not readable? Change text. captcha txt
Call Now Button