TWO PART, GUN GRADE POLYSULPHIDE JOINT SEALANT

Joint Preparation
The joint surface must be clean, dry and free from oil, loose mortar, laitance, release agents and other contaminants. A thorough wire brushing, grinding, sand blasting or solvent cleaning may be required to exposed clean, sound surface.

SpECseal Primer 25 for use on porous and nonporous surfaces.

SpECseal Primer 25 is a two component primer. The base and hardener components should be mixed together for 2 minutes to produce a uniform consistency.

The primer should be applied to clean, dry surfaces prior to the installation of backer rod or bond breaker tape.

The freshly mixed SpECseal 625HD should be applied after the primer is just touch dry. The sealant should be applied between 30 – 180 minutes after priming.

If the primer is left to dry longer than 3 hours the surfaces must be re-primed prior to applying the sealant.

SpECcord or SpECcell Polyethylene should be used to control the depth of the joint to the recommended thickness. Where joint design or depth of joint will not permit the use of backing rod, use a bond breaker tape over the cut back joint filler.

Mixing
SpECseal 625HD is the gun grade and is supplied in 2.5 litre composite packs with the base and curing agent placed in the tin ready for mixing.

The components should be mixed for a minimum of 5 minutes to obtain a uni form colour, free from streaks. Keep scraping the inner wall of the con tainer with spatula to avoid unmixed material sticking on the wall. Mixing should take place using a slow speed drill fitted with a SpECseal paddle mixer.

We do not recommend part mixing.

Application
Soon after mixing, the SpECseal 625HD should be loaded into a SpEC 600 ml solid barrel gun using a steel follower plate.