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The SuperFlex roofing membrane is used in conjunction with Alpha's water-based adhesive and solvent-based sealants, having been specifically engineered to provide premium performance and flexibility for the demanding roof designs of today's RV. SuperFlex is an Olefin based single-ply membrane that is approximately half the weight of EPDM but will not chalk or fade. SuperFlex has brilliant UV performance all while being resistant to mold, algae, and fungus.

  • Overview
  • Specs & Availability
  • Warranty
  • Installation & Resources
  • Technical Data
  • FAQs


SuperFlex roofing membrane is available in four colors, featuring color-through technology. All colors provide excellent UV protection. SuperFlex has a minimum 5% higher solar reflectivity after the initial 3 years, extending through the life of the product, than PVC. It is 10% thicker, has 220% higher tear resistance and 500% more elongation than PVC RV Roofing. Care and maintenance of the SuperFlex roofing membrane is simple, with periodic cleaning being the primary maintenance needed. Alpha Systems manufactures all of the environmentally friendly adhesives and sealants to properly bond and seal the membrane to provide a total roof package.

Alpha's SuperFlex membrane features & benefits include:
• 220% Higher Tear Resistance than PVC!
• Flexible for Today’s Complex Roof Designs!
• Excellent UV Protection!
• Puncture & Tear Resistant!
• Resistant To Mold, Algae, and Fungus!
• Colors Available!
• Texture Surface for Traction!
• Easy To Repair
• 500% More Elongation than PVC!
• 10% Thicker Than PVC!

Specs & Availability


Widths Lengths Thickness Colors
Cut Membrane All Lengths 5' increments Nominal .030" White, Gray, Beige, Almond
Roofing 8.0', 8.16', 8.5', 8.83', 9.0', 9.25', 9.33', 9.5' 400' Nominal .030" White, Gray, Beige, Almond
Slide Out 2.25', 2.50', 2.66', 2.83', 3.0', 3.16', 3.50', 3.66', 4.0', 4.08', 4.33', 4.50', 4.75', 5.0', 5.66', 6.66' 400' Nominal .030" White, Gray, Beige, Almond
Strips 4", 6", 8", 12" 18" 100' 175' Nominal .030" Nominal .030" White, Gray, Beige, Almond


Property Test Method Typical Performance
Color ----- White, Gray, Beige, Almond
Thickness ----- Nominal .030"
Shore A Durometer ASTM D-2240 75 +/- 5
Elongation ASTM D-412 650%
Weight / Square Foot ----- .0162 lbs
Specific Gravity ASTM D-297 1.04 +/- 0.03
Brittleness Temperature ASTM D-746 -49°F (-45°C)
Tensile Strength ASTM D-412 2060 psi (14.2Mpa)


Installation & Resources

Technical Data


Question: What is an “EPDM” or “rubber roof”?

Answer: EPDM stands for ethylene propylene diene monomer. These roofs have two layers and are manufactured using synthetic rubber compounds. The bottom layer is black and the top layer is white. For the most part, the industry moved away from rubber roof installations in 2011.

Question: What type of roofing membrane does Alpha currently carry?

Answer: Alpha’s SuperFlex roofing membrane is a TPO, which stands for thermoplastic polyolefin.

Question: is the benefit of a TPO membrane versus a EPDM rubber membrane?

Answer: TPO is a single-ply membrane. The membrane will not chalk like an EPDM rubber roof. TPO is 50% lighter than EPDM, has a textured surface for traction, and is resistant to mold, algae and fungus. All of these features plus more make the SuperFlex TPO the roofing membrane of choice, all while having the same great flexibility as EPDMrubber for the curves and designs of today’s RV units.

Question: How can I figure out what type of roof I have on my RV?

Answer: A unit manufactured after 2012 with Alpha’s membrane would have a TPO roof. Whether it is Alpha’s previous Alphaply membrane or the current SuperFlex membrane, both are considered TPO products.

For an older unit it could be either rubber (EPDM) or one of our TPO roofs. You can determine this by the texture of your roof.
Rubber roof (EPDM) – Is flat, smooth and very chalky to the touch. It loses its’ white layer over time exposing a black layer underneath.

TPO roof (SuperFlex or Alphaply) – Has a texture like an orange peel and is white all of the way through the membrane. The recommended maintenance for both types of TPO roof systems is similar.

Question: What do I use to seal/caulk my roof?

Answer: All of Alpha’sSuperFlex sealants are compatible with either TPO or rubber roofs. 1021 self-leveling sealant is ideal for placement around roofing fixtures.The1010 non-sag is used for vertical applications.

If covering over existing sealant, make sure the current sealant is clean and dry. (If dirty, it should be cleaned with a household cleaner.) Any loose sealant or debris that can be easily pulled off using your fingers should be removed. New sealant can then be applied directly over the old.

Sealant must be allowed to cure for at least 4 hours before being exposed to any rain or water. The temperature for applying caulk is 40 degrees and above. All caulking must be stored at room temperature.

Question: Do I need primer for my sealant/caulk?

Answer: No, ourSuperFlex 1010 and 1021 sealants do not require a primer. Only our Alphathane sealant requires a primer.

Question: What do I use to recoat/paint my roof with?

Answer: Please be sure to verify the type of roof you have first – TPO or EPDM.
o EPDM/rubber roof – Make sure whatever coating is chosen states that it is ok for an EPDM rubber roof.Alpha roof coating is a two part system (primer and top coat) sold under the brand name SuperFlex. The coating will typically last 4-5 years.
 SuperFlex All In One Adhesive & Primer (8010/8011) – Each gallon covers approximately 160 sqft. It is an adhesive; you cannot walk on it, therefor it is recommended that you apply it in sections.
 Superflex Rubber Roof Coating (4034) – Each gallon covers approximately 200 sqft. We recommend you purchase enough for 2 coats.
 Application: Apply in temperatures of at least mid-40’s and above. Make sure the roof is clean and dry. Use an extended handle roller (short nap), and apply a section of primer (primer is an adhesive and you cannot walk on it!). The primer goes on thick and white like Elmer’s glue. Once the adhesive starts to turn clear (15+ minutes depending on outside temperature). It is at its stickiest and you can go ahead and apply the top coat. Move back and do your next section. Once you are completely done with the first layer of primer and top coat, let it dry and apply the second coat of the top coat the next day.
o TPO– No coatings are necessary, as TPO is not a rubber, it is a plastic. The coatings made for rubber roofs will not adhere well to the TPO roof and will peel off much sooner than they would off a rubber roof. A TPO roof does not wear away and get thinner over time the way rubber roofs do, which is why a coating is not necessary.

Question: How do I maintain/clean my roof?

Answer: No special cleaners are necessary; just use a household cleaner like Dawn dish soap. Clean 2-3 times a year and inspect the caulking. Only once a rubber roof is more black than white it is a good time to think about a roof coating.

Question: What can I use to protect my roof?

Answer: Verify the type of roof you have. TPO – Just regular cleaning and maintaining of the caulking is sufficient. No protectants/coatings are needed. EPDM – Nothing is needed. If there is chalking, the Protect-All brand of UV protectant does a good job of sealing the surface and slowing down the oxidation/chalking.

Question: Why is my rubber roof chalking?

Answer: Rubber roofs have a very thin top white layer and a thicker black layer underneath. The white layer is considered cosmetic and is only as thick as a sheet of paper; it is the black layer that is your real protection. As the roof ages and is exposed to the sun and the elements, the white layer oxidizes and starts to chalk and wear away. This is the normal aging process of the roof and does not mean the roof is going to fail or start to leak.

Once an EPDM roof is more black than white, it is a good time to think about a roof coating.

Some people opt to let their roof go completely black, this is ok as well. This just means you should start using rubber roof conditioners to keep the rubber membrane from drying out.

Question: How do I patch my roof?

Answer: A product that you can find at any RV supply store or dealership is the Eterna-bond tape. It has really good adhesion and is an excellent patching product that will adhere to both EPDM rubber and TPO roof.

Alpha also sells a patch kit that comes with a 2 x 3 ft piece of membrane and a tube of 1021 sealant (self-leveling). It can be heat welded down or adhered using a plastic and vinyl adhesive.

For edge splits we offer a 6” wide patch.

Question: Black streaks/lines on roof?

Answer: Testing has found that it is the waterproofing spray that is applied to the cut edges of the wood used for decking that causes this issue. At times, this spray interacts with the membrane occasionally causing the roof membrane to grow/attract mildew in the areas where that spray is underneath the membrane, this is why you only see the lines where the seams of the decking meet underneath.

Upon inspection it is found that the underside of the membrane is still completely white. The decking water proofing spray causes a reaction with the membrane,mildew can grow on the surface of the membrane in those areas. Alpha hastested pieces of membrane that this has happened to and found that the membrane is not compromised. This is just a cosmetic issue and will not affect the ability of the membrane to keep water out and perform as intended. With a lot of experimentation Alpha has found a cleaning method that will clean most, if not all, of the stains off of the roof –

Materials required – soft brass bristle brush, bleach, clean rag, hose or power washer

1. Brush on 3-5 mils of bleach with small paint brush to affected areas.
2. Let the bleach sit for 10 minutes.
3. Take soft brass bristle brush and scrub vigorously to clean stained areas.
4. To achieve maximum effect, wipe scrubbed area with a clean rag, then hose/power wash the same area to rinse remaining residue.
5. The cleaning procedure is now complete!

Since this has been determined to be a cosmetic issue with the membrane, this would be covered under the warranty.

Question: Why is the roof wrinkled around all the vents and skylights?

Answer: The solvents in the 1021 self-leveling sealant temporarily swell the roofing membrane. In the warmer months it takes 3-5 days to go away & 5-9 in the colder months.

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