PCS-809
CHEM-REST EPOXY TOPPING
DESCRIPTION: A quartz filled epoxy-phenolic composite complex designed for concrete restoration and/or protection where extreme chemical and abrasion resistance is necessary. The aggregate has been specifically chosen to develop an exceptionally strong bond with the resin. This provides extreme toughness and impact resistance along with an anti-skid surface and high compressive strength.
40% of the volume of cured Chem-Rest is resin; additional surface protection is not required for most environments.
Seal coating the surface of Chem-Rest will provide a longer service life in harsh chemical environments. Consult PERMITE for recommendation dependent on service.
All of the components are pre-measured to insure reproducible quality.
Chem-Rest may be applied to wet surfaces and will cure down to approximately 30° F (cure time is significantly longer under these conditions).
Chem-Rest is also available as a “resin only” system for customers desiring to furnish their own aggregate.
SURFACE PREPARATION: Concrete: Prepare as for conventional grout. Remove laitance by “sweep” abrasive blast or by treating with muriatic acid. Surface treatments such as curing membranes, surface hardeners, etc., should not be used as they interfere with adhesion. Chem-Rest will tightly bond to most surfaces; however, the use of PCS-803 Grip-Tite Primer will provide superior adhesion properties to the composite. For Remedial Work: All damaged areas should be cleaned to a sound surface. Prime with PCS-803 before applying Chem-Rest. Surfaces not to be bonded should be precoated with paste wax or silicone grease. An almost infinite number of sets of conditions can be encountered when protecting concrete floors. It is not possible to cover all possibilities in a data sheet. In case of doubt as to correct preparation, consult PERMITE.
MIXING: Surface should be cleaned and primed before mixing Chem-Rest. Mix the entire contents of the kit as follows: (1) Empty the AGGREGATE portion into a temporary, clean, dry container. (2) Add the BASE and HARDENER together in the original AGGREGATE container and blend thoroughly with a power mixer for 3 minutes.(note: the resin mixture without aggregate generates a high level of heat and will become rock-hard in 18-20 minutes @ 72oF.) (3) Immediately begin adding the AGGREGATE to the BASE/HARDENER mixture slowly with agitation to completely wet-out the aggregate. Special mixers made specifically for 5-gallon containers are available commercially. A ribbon blender or plaster mixer is satisfactory. Blend until a stiff uniform paste is achieved.
APPLICATION: Chem-Rest may be hand or machine troweled. Because the mix is slightly “puffy,” some pressure on the trowel is necessary to eliminate voids in the applied grout. When applying to vertical surfaces, the mix should be made “stiffer” by incorporating Cabosil M-5, or Aerosils, or similar acting additive to improve the slump resistance. When tying into existing cured epoxy grouts, adhesion is difficult to achieve. Consult PERMITE for assistance in the design of procedure in these cases.
CHEMICAL RESISTANCEAt ambient temperatures up to 100oF, Chem-Rest is suitable for the following:
| Sulfuric Acid, | Up to 70% |
| Hydrochloric Acid, | Up to 25% |
| Nitric Acid, | Up to 25% |
| Acetic Acid, | Up to 25% |
| Soduim Hydroxide, | Up to 70% |
| Most aqueous solutions of salt at all concentrations |
Chem-Rest is not resistant to some organic solvents; contact PERMITE for specific data.
In the presence of strong acids, the surface of Chem-Rest will develop a pronounced green color. This is permanent but does not affect the long-term protective qualities.
CAUTION: PCS-809 hardener is corrosive. Components of this product, when combined, may be skin irritants and/or skin sensitizers. Rubber gloves should be warn to minimize skin contact. Practice caution and good personal cleanliness to avoid skin and eye contact. Avoid breathing vapors of heated material.
See material safety data sheet for full precautions prior to use.
If swallowed, do not induce vomiting. Call a physician immediately. For eye contact, flush with water; if irritation persists, seek medical attention. In case of skin contact, wash thoroughly with soap and water.