SpecShot

High-Performance Shotcrete Repair Mortar

SpecShot is a single-component, high-performance shotcrete mortar formulated for demanding vertical and overhead concrete repair projects. It provides exceptional durability, low rebound, and low shrinkage, ensuring long-lasting repairs in industrial, commercial, and infrastructure settings, including Department of Transportation (D.O.T.) applications.

Designed for application via dry shotcrete (gunite) or wet mix methods, SpecShot delivers a strong bond to existing concrete, making it a reliable solution for restoring deteriorated structures. Its built-in corrosion inhibitor enhances durability, while its concrete-gray color ensures a seamless finish.

• One-component formulation – just add water

•Low permeability – enhances durability and resistance to moisture intrusion

•Low rebound – minimizes material waste during application

•Low shrinkage – reduces cracking and enhances longevity

•Integral corrosion inhibitor – protects against reinforcement corrosion

• Designed for vertical and overhead repairs – ideal for structural restoration

•Concrete-gray color – blends with existing concrete for a natural appearance

Application

Surface Preparation

•Ensure the concrete substrate is sound, clean, and free from oil, grease, dust, laitance, or other contaminants.

•Best practice: Saw-cut the perimeter of the repair area and use abrasive blasting to achieve a uniform depth and high surface profile for optimal adhesion.

•The surface should be saturated-surface-dry (SSD) with no standing water before application.

Mixing

•Add potable water at a maximum rate of 10% (7.6 pints per 80 lb. bag).

•Mix thoroughly using standard dry process shotcrete methods.

Placement

•Apply in accordance with ACI 506-R05 “Guide to Shotcrete” for best results.

•Recommended application depth: ½ inch to 6 inches per pass.

•For repairs exceeding 6 inches, apply in multiple layers, cross-hatching the initial layer and allowing it to harden before applying additional layers.

Finishing & Curing

•Finish the repair material to match the surrounding concrete texture.

• Self-curing under most conditions; however, in extreme drying conditions, use an ASTM C309-compliant water-based curing compound.

Packaging

• 80 lb. bags – yields approximately 0.62 cubic feet per bag

•3,000 lb. bulk bags available upon request

Cured Unit Weight: 135 lbs. per cubic foot

Shelf Life

•Shelf life: 12 months in unopened bags, stored in a dry facility.

•Avoid exposure to excessive temperature fluctuations and high humidity, which may shorten shelf life.

•Store in a cool, dry area, away from direct sunlight.

Uses

• Bridge and tunnel repairs

• Parking structure restoration

• Industrial facility maintenance

• D.O.T. infrastructure rehabilitation

• Concrete wall and column repairs

Standards

Setting Time (ASTM C-266)

•Initial Set: ~3 hours

•Final Set: ~5 hours

Compressive Strength (ASTM C-109)

•3 days: 2,000 psi

•7 days: 3,500 psi

•28 days: 5,500 psi

Bond Strength (ASTM C-882)

•7 days: 1,600 psi

Flexural Strength (ASTM C-348)

•7 days: 500 psi

•28 days: 700 psi

Scaling Resistance (ASTM C-672, 50 cycles)

•Result: No scaling

Cleaning

Tools and equipment can be cleaned with water before SpecShot hardens.