Armor Plate 770 is used for saturating fiberglass mat as part of the application of the Armor Plate 700 Lining System. AP 770 bonds to concrete, wood or steel.

  • lining for API separators
  • lining for tanker trucks and chemical transports
  • lining for waste hauling transports
  • a chemical resistant lining for steel and concrete
  • a pipe repair material
  • a coating for fiberglass reinforcements
  • a fixation and saturation material for fiberglass reinforcements
  • acid and caustic resistant

Chemical Resistance

Armor Plate 770 has exceptional chemical resistance to water and steam. It also resists alkalies and bleaches. Contact the Wil-Cor, Inc. Technical Department for chemical resistance in specific service conditions.

Physical properties

Consistency Medium
Pot Life @ 70 °F (Depends on Promotion) 20-40 min.
Cure Time @ 70 °F (Barcol 40) 24 hrs.
Service Temperature Limit 250 °F
Tensile Strength (ASTM D-638) @ 77 °F 10-11,000 psi
Tensile Modulus (x10-5) (ASTM D-638) @ 77 °F 5.1
Flexural Strength (ASTM D-790) @ 150 °F 18-20,000 psi
Flexural Modulus (x10-5) (ASTM D-790) @ 77 °F 5.5
Barcol Hardness (ASTM D-2583) 40
Linear Coefficient of Thermal Expansion, (75% Resin) in./in./°F 17 x 10-6
Glass Content (FTMS-7061) 25%
Elongation % 3

Installation Recommendation

Wil-Cor, Inc. recommends supervision by Wil-Cor or that this product be installed by experienced fiberglass installers. Preparation, mixing and application information is provided for installers with adequate installation experience. Refer to CES-770 for further installation specifications.


Mix resin (part A) and catalyst (part B) at the job site, immediately prior to application. The pot life of the catalyzed resin is very short (10 to 15 min.), so only mix quantities that can be used during a 10 min. period.

The mixing ratio of Resin:Catalyst will vary with temperature. The catalyst is Armor Plate 60, methyl ethyl ketone peroxide or cumene hydroperoxide. Use 1.5-2 oz. of catalyst for each gallon of resin.

More catalyst is needed at lower temperatures, less is needed at high temperatures. The pot life can be extended by using less catalyst.

Mix a wax additive (1 oz./gal.) with the AP 770 resin top coat. Wax additives prevent air inhibition and allow a proper cure for the top coat. Use wax ONLY in the top coat.

Surface Preparation

A clean surface is necessary to properly apply the Armor Plate 770. Remove dirt, oil and other contaminants by sandblasting or other mechanical methods. All surfaces must be dry before AP 770 is applied.


AP 770 is applied by bristle brush with unpainted handle, squeegee, or long nap roller. Armor Clean my be used to clean equipment, but not for personal cleanup.

Allow the coating to cure for approximately 12 hours before placing in service. If it takes more than 4 or 5 hours for the applied resin to set, increase the catalyst, but DO NOT use more than 2 oz. per gallon. The following factors affect the cure of thermosetting resins such as Armor Plate 770:

  • 1The resin temperature, the ambient temperature, and the temperature of the surface to which the resin is applied-lower temperatures lengthen the cure time.
  • 2The coating thickness-thin resin films cure more slowly than thicker resin films.
  • 3The humidity-high humidity slows the cure of resin exposed to the atmosphere.


Armor Plate 770 is available in stock sizes of 1-quart, 1-gallon, 5-gallon and 55-gallon drums.

Coverage and Estimating

The theoretical coverage of the Armor Plate 770
components when used as:

AP 770 Primer 150-200 sq. ft./gal. (Depends on surface roughness)
AP 770 Saturating Coat 25 sq. ft./gal. (Per laminate of 1.5 oz. chopped strand mat)
AP 770 Top Coat 150-200 sq. ft./gal.

Shelf Life

The expected shelf life of the Armor Plate 770 components in storage is 1 to 3 months if sealed tightly at temperatures around 75 °F.


For Industrial Use Only! – Flammable Liquid

Resin Component

  • Causes eye or skin irritation. Always wear suitable clothing to minimize skin Contact.
  • Vapor caused headache, dizziness, nausea and unconsciousness. Area must be ventilated. If inhaled, remove victim to fresh air. Give artificial respiration if not breathing.
  • For eye Contact, flush with water immediately.
  • For skin Contact, wash with soap and water immediately. Remove contaminated clothing.
  • If swallowed, give large amounts of milk or water to drink and seek immediate medical attention.
  • Flammable. Keep away from all sparks, flames or heat. Extinguish fires with foam, dry chemical, carbon dioxide or water spray.

Hardener – AP 60 (Methyl Ethyl Ketone Peroxide)

  • Store in a cool place away from all sources of heat.
  • NEVER store near cobalt naphthenate or other promotors, accelerators or strong reducing agents.
  • Strong irritant. Ingestion can be fatal. If swallowed, induce vomiting and call physician.
  • For eye contact, flush with water for 30 minutes and call physician immediately.
  • For skin contact, wash with soap and water immediately. Remove contaminated clothing.

Before use, review Material Safety Data Sheet for further information. Read and follow the hazard information and first aid directions on each product label before using.