The 3R 811 is produced by expanding 100% virgin PTFE into a highly fibrillated structure which exhibits characteristics significantly different than conventional PTFE. The expanded PTFE is much more flexible than regular PTFE and thus conforms easily to irregular and rough surfaces. In addition, the expanded material is easier to compress and exhibits excellent resistance to creep and cold flow. This style of joint sealant is supplied as a continuous tape with a self-adhesive backing strip to facilitate easy installation.


This joint sealant resists virtually all chemicals in the 0-14 pH range and will not contaminate flow media. It has no smell or taste. It fulfills the FDA 21 CFR 177.1550 Perfluorocarbon Regulations.

It is recommended for the following sealing applications:
Steel pipe flanges, heat exchanges, manhole and handhole covers, glass-lined pipe flanges, fiberglass reinforced vessels, ceramic joints, fiberglass pipe flanges, pump housing flanges, ventilation ducts, plastic pipe flanges, compressor housing flanges, hydraulic and pneumatic systems, fume ducts, turbine cases, water supply systems and food ducts.


Technical Data

Minimum -240°C (-400°F)
Maximum 260°C (500°F)
Static Vacuum to 2900 psi (200 bar)
pH 0 - 14 (except molten alkali metals and elemental fluorine)

Size recommendations

Flange size
For pipe size up to 1/2" dia. Width : 1/8"
Thickness: 1/16"
3/4" to 1- 1/2" dia. Width : 3/16"
Thickness: 0.087"
2" to 4" Width : 1/4"
Thickness: 3/16"
5" to 8" Width : 3/8"
Thickness: 3/16"
10" to 16" Width : 1/2"
Thickness: 1/4"
18" to 24" Width : 5/8"
Thickness: 0.28"
26" to 36" Width : 3/4"
Thickness: 5/16"
36" and above Width : 1"
Thickness: 5/16"
N.B. The information, details and values indicated are to the best of our knowledge. We recommend to conduct tests according to local conditions. The data is subject to some variations without notice.