Poly-Seal TPO
Poly-Seal TPO is a single-sided modified butyl seam sealing tape constructed with 18.5–22.5 mils of The Gray Matter™ enhanced formula butyl sealant on a 6.5 mil thermoplastic polyolefin (TPO) backing, for a total thickness of 25–29 mils. Engineered for HVAC, skylight, and exterior trim sealing, it delivers ≥10 pli peel adhesion, 680 psi average tensile strength, and 900% average elongation. UV resistance is excellent, and the tape passes Xenon-arc weatherometer testing at 0.70 W/m². Service temperature spans −40°F to 180°F.
Key Properties
- Peel Adhesion: ≥10 pli
- Tensile Strength: 680 psi average (ASTM D822)
- Elongation (Average): 900%
- Service Temperature: −40°F to 180°F
- UV Resistance: Excellent (Xenon-Arc Weatherometer Pass)
- Total Thickness: 25–29 mils (18.5–22.5 mils butyl / 6.5 mils TPO backing)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Total Thickness | 25–29 mils | — |
| Adhesive Thickness | 18.5–22.5 mils | — |
| Backing / Carrier Thickness | 6.5 mils | — |
| Color | White | — |
| Material / Substrate | Butyl / TPO | — |
| Backing / Carrier | Thermoplastic Polyolefin | — |
| Finish | Non-Gloss | — |
| Adhesive Type | Modified Butyl | — |
| Adhesive System | Permanent Adhesive | — |
| Adhesive Side | Single Sided Adhesive | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 680 psi average | ASTM D822 |
| Elongation (Average) | 900% | — |
| Flexibility (Low-Temp) | Pass, no cracking | — |
Adhesion Properties
| Property | Value | Test Method |
| Peel Adhesion | ≥10 pli | — |
| Bonding Time | Immediate, watertight aggressive grip; full bond within 24 hours | — |
Thermal & Environmental Properties
| Property | Value | Test Method |
| Service Temperature | −40°F to 180°F | — |
| Recommended Application Temperature | 32°F to 110°F | — |
| Water Resistance | Excellent | — |
| UV Resistance | Excellent | — |
| Xenon-Arc Weatherometer (340 nm Wavelength, 80°C Black Body Temperature) | Degradation @ 0.70 W/m² | — |
Shelf Life / Storage
| Property | Value | Test Method |
| Shelf Life | 24 months | — |
| Recommended Storage Conditions | 35°F to 110°F | — |
- HVAC unit, skylight, and exterior trim sealing where UV-resistant butyl performance is required
- Air and moisture sealing in homes, sunrooms, rooftops, basements, and recreational vehicles
- Mulling of window frames and sealing seams on sunrooms, RVs, and TPO single-ply roof systems
- Window curb flashing and roof curb flashing in residential and light-commercial construction
- Standing seam metal roof sealing where non-staining, asphalt-free butyl is required
Common industries: Roofing and construction, HVAC, recreational vehicles, residential window installation, building envelope sealing.
Poly-Seal TPO is a single-sided modified butyl seam sealing tape engineered for water-resistant exterior sealing on HVAC equipment, skylights, exterior trim, and building envelope penetrations. The construction pairs 18.5–22.5 mils of The Gray Matter™ enhanced formula butyl sealant with a 6.5 mil thermoplastic polyolefin (TPO) backing in a non-gloss white finish.
The TPO backing provides UV resistance and dimensional stability suited for long-term exterior exposure, and is the industry-standard backing material for single-ply roofing systems — making this tape compatible with TPO-based roof membrane assemblies.
The Gray Matter™ butyl formulation is positioned as an enhanced sealant with aggressive grip and self-healing performance around fasteners, flowing into voids to produce positive seals between mating surfaces. Critically, the butyl will not melt or stain like asphalt-based flashing tapes — a meaningful distinction for residential and commercial applications where appearance and long-term substrate integrity matter.
Performance characteristics include immediate watertight aggressive grip, full bond within 24 hours, 680 psi average tensile strength per ASTM D822, and 900% average elongation. UV resistance is rated Excellent, and the tape passes Xenon-arc weatherometer testing at 340 nm wavelength with 80°C black body temperature, with degradation reported at 0.70 W/m². Service temperature is −40°F to 180°F — the widest service range in the Poly-Seal series.
Application requirements per the TDS: surfaces must be dry and free of dirt, oil, and grease; the tape must not be stretched during application; the product is not repositionable.
What differentiates Poly-Seal TPO from other Poly-Seal variants?
TPO is positioned as the UV-resistant exterior seam sealing variant, with a thermoplastic polyolefin backing that provides direct compatibility with TPO single-ply roof membranes and superior weatherometer performance. The −40°F service low end is the widest in the Poly-Seal series, and the explicit non-staining behavior versus asphalt-based flashing tapes is a key residential-application differentiator. The 900% average elongation is also the highest in the family.
Why is peel adhesion important when selecting this tape?
Peel adhesion measures resistance to separation under the wind uplift, water penetration, and thermal-cycling stresses common in exterior building envelope applications. The ≥10 pli peel value combined with 680 psi tensile strength and 900% elongation produces a sealant capable of accommodating significant building movement without losing seal integrity.
What is the service temperature range for Poly-Seal TPO?
Poly-Seal TPO has a service temperature range of −40°F to 180°F, with a recommended application temperature of 32°F to 110°F.
Is Poly-Seal TPO suitable for UV-exposed exterior applications?
Yes. The TDS rates UV resistance as Excellent and confirms the tape passes Xenon-arc weatherometer testing (340 nm wavelength, 80°C black body) with degradation reported at 0.70 W/m². The TPO backing is industry-standard for long-term UV exposure on commercial roofing. No specific regulatory compliance standards are listed on the TDS for this material.
How should Poly-Seal TPO be specified?
Specify product (Poly-Seal TPO), thickness (25–29 mils total), backing (TPO), color (White), application surface, compliance requirements, dimensional tolerances, and finished format.
