ePTFE Joint Sealant Tape

What is ePTFE Joint Sealant Tape?

ePTFE joint sealant tape is specially processed by expanding 100% pure polytetrafluoroethylene (PTFE). ePTFE joint sealant tape provides a soft, highly compressible gasket for longer life and trouble-free sealing. Its form-in-place versatility also cuts maintenance and storage costs. The high compressibility of ePTFE Joint Sealant enables it to effectively fill flange imperfections for a tight, leak-free seal. Under pressure, it provides a very wide, thin ribbon-like joint sealant. Unlike conventional PTFE which is prone to cold flow, ePTFE Joint Sealant tape has good creep resistance and bolt torque retention properties. ePTFE joint sealant tape does not support bacterial growth or cause product contamination and is FDA compliant. It has virtually no shelf-life concerns since PTFE is unaffected by normal environmental conditions. ePTFE Joint Sealant tape has excellent resistance properties to chemical attack with a pH range of 0-14.

Applications

ePTFE joint sealant tape is ideal for most chemical services at temperatures to 600°F (316°C) and pressure to 3,000 psi (207 bar). It is also suitable for cryogenic use to -321°F (-196°C). The sealant is available in roll form which helps reduce storage space and is available in a wide variety of thicknesses and lengths.

ePTFE joint sealant tape is perfect for pulp and Paper, Food & Beverage, Distillers, Petro Chemical and General Chemical

Advantages of ePTFE Joint Sealant Tape

Form-In-Place

ePTFE joint sealant tape conforms to any surface, including rough, pitted, scratched and damaged surfaces.

Flexible

ePTFE joint sealant tape can be installed on round, oval, rectangular and complex surfaces.

Chemically Resistant

ePTFE joint sealant tape is made of 100% PTFE and it is compatible with almost any process fluid (except molten alkalis and elemental fluorine)

Adhesive-Backed

ePTFE joint sealant tape has convenient adhesive strip and peel-off backing allow easy installation on both horizontal and vertical surfaces.

Long Shelf Life

ePTFE joint sealant tape has an Unlimited Shelf Life, shows No Age Deterioration, and Resists Creep & Cold Flow.

Installation of ePTFE Joint Sealant Tape

1. At the time of installation, the sealing surface must be clean, free from grease and dry to enable the gasket to stick properly.
2. The width of the joint gasket is to be determined by the nominal diameter or type of flange.
3. Selection of a tentative size of joint gasket would be approx, 1/3rd flange contact width inside the bolt hole; example: 7 mm gasket joint to suit a 20mm flange width.
4. Remove the protective foil from the adhesive joint gasket to allow for fitting.
5. Stick the gasket about 2mm away from the bolt hole and press lightly.
6. Do not butt the ends, instead overlap them in front of a bolt.
7. Tighten the lubricated bolts in opposite pairs. The lap joint deforms perfectly to give a reliable seal.
8. On irregular of damaged flanged surfaces, it is possible to build up with short length of ePTFE

Technical Data Sheet

Properties	Test Methods	Typical Value	Test Unit
Color	-	white	-
Density	ASTM D795	0.75	g/cm3
Compressibility	ASTM F36	68	%
Recovery rate	ASTM F36	10	%
Tensile Strength	ASTM F152	21	mpa
Sealability	ASTM F 37A	0.1	ml/hr
Creep Relaxation at 73°F	EN 13555	5	%
Working temperature	-	-260 to 260	°C