FLEX PUTTY – MRO 8003

Protect processing equipment such as coating hoppers, lining chutes, pump volutes, impellers and fan housings

Rubber Bellows crack protection

CURE

‘MRO 8003 Flex Putty’ hardens in around 2 hours at 21°C at 12.5mm thick. The functional cure time may be reduced by curing at an elevated temperature. Heating can be done with a hot box, heat lamps or other heat sources. Never expose this system to a direct flame.

SURFACE PREPARATION

Proper surface preparation is essential to a successful application. The following procedures should be considered:

All surfaces must be dry, clean and rough.

If surface is oily or greasy use ‘MRO 1011 KLEANER DEGREEZER’ to degrease the surface.

Remove all paint, rust and grime from the surface by abrasive blasting or other mechanical techniques.

Aluminum repairs: Oxidation of aluminum surfaces will reduce the adhesion of an epoxy to a surface. This film must be removed before repairing the surface, by mechanical means such as grit-blasting or chemical means.

Provide a “profile” on the metal surface by roughening the surface. This should be done ideally by grit blasting (8-40 mesh grit), grinding with a coarse wheel or an abrasive disc pad. An abrasive disc may be used provided white metal is revealed. Do not ’feather edge’ epoxy materials. Epoxy material must be ’locked in’ by defined edges and a good 3 – 5 mil profile.

Metal that has been handling sea water or other salt solutions should be grit blasted and high pressure water blasted and left overnight to allow any salts in the metal to ’sweat’ to the surface. Repeat blasting may be required to ’sweat out’ all the soluble salts. A test for chloride contamination should be performed prior to any epoxy application. The maximum soluble salts left on the substrate should be no more than 40 ppm.

Chemical cleaning with ‘MRO 1011 KLEANER DEGREEZER’ should follow all abrasive preparation. This will help to remove all traces of sandblasting, grit, oil, grease, dust or other foreign substances.

Under cold working conditions, heating the repair area to 38ºC – 43º C immediately before applying any of MRO INFRA’s metal-filled epoxies is recommended. This procedure dries off any moisture, contamination or solvents and assists the epoxy in achieving maximum adhesion to the substrate.

Always try to make the repair as soon as possible after cleaning the substrate, to avoid oxidation or flash rusting.

MIXING

It is strongly recommended that full units be mixed, as ratios are pre-measured.

Add hardener to resin.

Mix thoroughly with screwdriver or similar tool while continuously scrape material away from sides and bottom of container until a uniform, streak-free consistency is obtained.

APPLICATION

For best results, product should be kept and applied at room temperature. ‘MRO 8003 Flex Putty’ can be applied when temperatures are between 15ºC and 40ºC. Using a putty knife, trowel or spatula, a very light coat should be applied to “wet out” the surface, allowing for 100% contact and further thickness buildup.