Joint Sealing Systems

KingSeal CR25^®

Closed cell polyethylene backing rod.

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Density

ASTM D792: 0.04 g/cm³

ASTM D792

Cell size

ASTM D3576: 0.82 mm

ASTM D3576

Water absorption

ASTM: 0.08 mg/cm² D570

Elongation at break

ASTM 60% D638

ASTM 60

Packaging

Cord

Standards

3 cited

ASTM 60 · ASTM D3576

Overview

KingSeal CR25 is a closed cell polyethylene foam cord, non- absorbent and rot proof. KingSeal CR25 holds in position between both sides of the joint to help with tooling of the sealant and improve sealant contact with joint side to facilitate good adhesion.

Applications

KingSeal CR25 enables the correct width to depth ratio of the sealing slot to be maintained and provides a firm backing for the sealant to be tooled
The use of KingSeal CR25 will also act as a bond breaker at the base of the joint thus preventing three sided adhesion and the accompanying additional stress during joint movement

Advantages

Rot proof and non-absorbent
Available in different sizes
Readily compressible
Acts as bond breaker and minimizing strain for joint sealants
Provides a firm backing for sealant tooling
Easy to install
Economical
STANDARDS KingSeal CR25 complies with ASTM C1330-96, Type C

Technical Properties

Property	Value	Standard
Density	: 0.04 g/cm³	ASTM D792
Cell size	: 0.82 mm	ASTM D3576
Water absorption	ASTM: 0.08 mg/cm² D570	—
Elongation at break	% D638	ASTM 60
Service temperature	-20 to 100°C	—
Application temperature	-5 to 100°C	—
Service life	+ 20 years	—
Moisture permeability	ASTM 0.5 g/cm² @ 24 hr D570	—
Thermal conductivity	ASTM 0.0406 w/m² D5930	—
Permanent compression set	1 – 2% (100 KGF/cm²)	—