installation instructions —
Cementitious Polyurethane
Flooring System
Perdüre UMC- SL

installation instructions perdüre umc-tg

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Part 4—Application of Top Coat / Termination & Repair

Mixing

1. Add equal parts of Part I and Part II to mixer and blend for 30 seconds. Add the pigment (except for neutral color) to the Part 1 prior to mixing.
2. Weigh out 7 lbs (about 1gallon) of Part III powder and add slowly to the mix (while mixer is running) and allow to blend for 3-4 minutes. Be sure to ‘wet-out’ all parts of mix, scraping sides and bottom of mixer during mixing. Ll powder must be uniformly blended with no visible lumps of dry powder.

Application

1. Place mixture on floor and spread with a squeegee to a coverage rate of 100 ft²/kit (or as otherwise specified) and immediately backroll lightly with a loop roller. Keep roller cleaned with isopropyl alcohol. Do not backroll the material excessively.
2. Leave ‘wet line’ or puddle of material between batches to avoid ‘knit-lines’ in the finished system. Maximum working time is 10-15 at 70-75°F. To extend the working life 5 minutes, add 5-10% Isopropyl Alcohol to the urethane resin during mixing, prior to adding the powder.

Termination points at the end of the day should be made at doorways, expansion joints, etc. If it is not possible to terminate at these points, 2" masking tape should be placed in a straight line at the ending point. Carefully trowel the material up to and slightly over the inside edge of the tape. Allow material to cure for about 30 minutes and remove the tape.

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Terminations, Crack Repair, Joint Treatments

1. All free edges (perimeters, terminations adjoining cove base or control/expansion joints, or along gutters or drains) require ‘keyed in’ extra anchor to distribute mechanical and thermal stresses. This can be achieved using a chipping hammer or saw.
2. All expansion joints must be exposed through the system. Control joints (saw cuts) and cold joints should also ideally be exposed through the Perdüre UMC but may be overlaid if the facility owner accepts that future telegraphing cracks may develop if expansion/contraction movement occurs in the substrate joint. To overlay a control joint, fill with rigid epoxy (Perdüre EJF), Perdüre UMC-SL or Perdüre UMC-CO. Consult with your technical representative on use of flexible epoxy crack isolation membrane as a surface treatment over filled control joints and cold joints. Do not overlay expansion joints.
3. Cracks: Route cracks larger than 1/16" and fill with rigid epoxy, Perdüre UMC-SL or CO and reinforce with minimum 12" wide fiberglass cloth. Consult with your technical representative on use of flexible epoxy crack isolation membrane as a surface treatment over filled cracks.

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