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COPPERHEAD – Deck Joist & Beam Tape is a flexible waterproof self adhered Butyl tape used to maximize the life expectancy of wooden deck structures. It is designed to help stop decay and wood rot caused by moisture that runs off the deck boards and stays in contact with the wooden deck framing. It functions as a moisture barrier cap directly on top of joists and beams. The advanced butyl rubber adhesive combined with a UV resistant Polyethylene facer acts as a barrier diverting water and sealing around fasteners. This prevents premature wood rot while still allowing the joists to breath, ensuring your foundation lasts as long as the deck. Copperhead JBT tape is compatible with the majority of deck materials including pressure treated wood and composite products.

  • Durable, high strength, flexible and UV resistant engineered film facer.
  • High temperature butyl adhesive, thermal stable to 260°F(132°C), no drips, oozing or stains.
  • Ridged Black Polyethylene top surface is slip resistant and won’t show between deck boards.
  • Cold temperature install down to 25°F(-4°C) and rising.
  • Pressure sensitive Butyl adhesive forms a tight seal around deck fasteners.
  • Easy to remove silicone treated release liner.
  • Stock available in 2 sizes; 1 5/8” for joists and 3 ¼” for beams.
  • UV Exposure rating up to 10 years

SPECIFICATIONSCopperhead Tape Joint and Beam Tape
Length / width per roll75 ft (22.8m) /1 5/8” and 3 1/4”
Rolls widths available: 1 5/8” & 3 1/4”1 5/8”- Up to 24 /box
3 1/4” Up to 12/Box
Weight per square meter626 GSM
Master box weight31.26LBS

Test and StandardCopperhead Tape Joint and Beam Tape
Length / width per roll75 ft (22.8m) / 1 5/8” and 3 1/4”
Rolls widths available: 1 5/8” & 3 1/4”1 5/8” 24/box
3 1/4” 12/box
Slip resistant surface-Embossed ridged top surfaceEmbossed Traction Grip
Release linerSilicone treated release liner
Fastener sealability per ASTM D1970Pass
Permeability – ASTM E96<0.05 Perms
Air Permability ASTM E2178<0.001 l/s/m2
Minimum thickness – ASTM D197025 mils
Tensile strength MD / CD – ASTM D197052.2 lbs/in I 54.3lbs/in
Elongation: ASTM D1970 – MD/CD>300%
Tear resistance MD / CD – ASTM D197032.6 lbs (32 kg) / 31.2 lbs (27 kg)
Low-Temperature Flexibility ASTM D1970Pass
Adhesion to plywood @40°F(4.4°C)- ASTM D197075 lbf /ft |65 lbf /ft
Adhesion to metal @75°F(23°C) /40°F(4.4°C) – ASTM D197085 lbf /ft | 80 lbf /ft 70 lbf
Adhesion to plywood @75°F(23°C)- ASTM D197070 lbf /ft | 65 lbf /ft
Thermal stability – ASTM D1970260° F (126.7°C)
Installation temperature25°F (-4°C) and rising
Service Temperature-40°F to 270°F
Limited warranty10 Years

Install instructions

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