Komodo BSA

Komodo BSA Roof Green
3-months UV-logo-colour


KOMODO BSA is a high-temperature self-adhered waterproofing membrane made with an advanced butyl rubber adhesive formulation and designed for use in steep slope roofing applications. It offers premium protection against water infiltration from snow, ice dams, and wind-driven rain.  It can be used 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.


KOMODO BSA features GRIPSPOT™ a patented slip resistant walking surface that provides improved slip resistance in all weather conditions. GRIPSPOT features raised fibrous traction spots and smooth channels that allow for faster water shedding and quicker dry times.  Products are engineered for extreme environment tear strength and designed for applications requiring heavy foot traffic and longer installation times like tile, slate, or metal roofing. 

• 100% Butyl adhesive provides the ultimate
bond to plywood or OSB roof decks
• Deck adhesion up to 3X Stronger than standard modified bitumen products
• Extremely low installation temperature -4°F(-20°C) and rising
• Advanced adhesive formulation allows for longer shelf life up to 18 months without significant adhesive strength reduction
• Chemically compatible with low slope roofing materials such as EPDM and TPO
• Superior self sealing around fasteners (Product meets and exceeds ASTM D1970)
• Watertight side laps without special
treatment or requirement for primers
• All temperature, all climate performance
-40°F to 270°F (-40°C to 132°C)
• Easy to remove double sided silicone treated split-release liner
• UV Exposure rating up to 180 days, Limited Lifetime Warranty   

Roll Size ( Gross)5 square ( 500 sqft)
Roll lenght X width/ Roll hieght134ft X45in/80lb (36kg)

Test and StandardBlock-Aide
Tensile Strenght MD/CD ASTM D1970
80lb/in I 75lb/in
Elongation MD/CD ASTM D197030% / 30%
Tear Strenght MD/CD ASTM D1970120lb/115lb
Adhesion to plywood @75°F /@40°F ASTM D197075 lbf/ft / 65 lb/ft
Adhesion to metal @75°F /@40°F ASTM1970 85 lbf/ft / 80 lb/ft
Adhesion on gypsum @75°F /@40°F ASTM D197070 lbf/ft / 65 lb/ft
Lap Adhesion ASTM D187675 lbf/ft
Lab & Nail Sealability ASTM D 1970Pass
Water Shower Exposure ASTM D4869Pass
Permeability ASTM E96<0.05 Perms
Water absorption ASTM D5147<0.1%
Air Permeability ASTM E2178 <0.001 L/s/m2
Nominal Thickness ASTM D1970 31 mils
Low-Temperature Flexibility ASTM D5147-58 °F (-50 °C)

Caution: Always follow Safety Instruction, Building Codes and Safe Work Practices issues by the local Govt. bodies (e.g. OSHA / WCB)


Komodo BSA 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 store Komodo BSA 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 the 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 the product to a cooler location. Once cooled, the release liner can be easily removed.


For best results, Komodo BSA should be installed when the air, membrane, and the substrate temperature is over 40°F (4.4°C). However, Komodo BSA can be installed in temperatures as low as -4°F (-20°C) and rising. 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. Always work from the low point to the high point of the roof. Apply the membrane in valleys before the membrane is applied to the eaves. Komodo BSA 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 with the vertical end lap with 6” spacing between nails. To increase adhesion a water-based primer can be used along with end lap. End laps should be offset a minimum of 6 feet on adjacent courses. Where it is necessary to overlap Komodo BSA 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 with 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 approximately 4”(10cm) and apply in position on the roof deck. Continue peeling back one side of the liner and press in place by hand or with a 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 small 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 uppermost 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, warm Komodo BSA 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.
Komodo BSA should be applied under the metal drip edge along with the rakes and over the metal drip edge along the eaves unless otherwise specified by local building codes. Do not fold Komodo BSA 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 Komodo BSA 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 Komodo BSA stay in contact with the roof deck into and out of the valley area. Komodo BSA 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.


Komodo BSA 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. Komodo BSA is not designed for indefinite outdoor exposure. Final roofing should be installed within 180 days of underlayment installation.

Komodo BSA logo program

Our Komodo Dual Logo Program is a great 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

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