Master Builders MasterFlow 555 50lb Bag

MasterFlow 555 is a Fluid, non-shrink mineral-aggregate grout. It is ideally suited for grouting machines or plates requiring optimum load bearing support.

Meets ASTM C 1107 requirements at a fluid consistency (20–30 second flow)
Wide application temperature range of 50 to 85 °F (10 to 29 °C).
No accelerators, including chlorides or other similar salts, will not contribute to corrosion of reinforcing steel

$17.50

SKU

20109

MasterFlow 555 – Fluid, Non-Shrink Mineral Aggregate Grout

MasterFlow 555 is a high-performance, mineral aggregate grout that provides reliable non-shrink characteristics and excellent compressive strength for structural applications. Engineered for fluid placement and ease of use, it is ideal for grouting baseplates, machinery, anchor bolts, and precast panels. MasterFlow 555 meets ASTM C1107 requirements and can be applied across a wide temperature range of 50 to 85 °F. Its fluid formulation allows placement in tight or complex geometries while providing high bearing support without bleeding or segregation. This grout is free of chlorides and accelerators, reducing the risk of corrosion on reinforcing steel and making it suitable for both interior and exterior use in demanding construction environments.

Key Features:

Meets ASTM C1107 standards at fluid consistency
Excellent early and long-term compressive strengths
Non-shrink performance for structural load transfer
Chloride-free formulation reduces corrosion risk
High effective bearing area with no bleeding
Can be mixed to plastic, flowable, semi-fluid, or fluid consistencies
Wide application temperature range: 50–85 °F
0 g/L VOC – suitable for environmentally regulated jobsites

Applications:

Baseplates, soleplates, and machinery supports
Anchor bolts, dowel rods, and reinforcing bars
Precast panel bedding and structural void filling
Grouting concrete slabs, rock pockets, and underpinning
Pressure grouting for slab alignment and repairs
Interior and exterior general construction applications

Technical Specifications:

Property	Value
Compressive Strength @ 1 Day (Fluid)	2,000 psi (14 MPa)
Compressive Strength @ 28 Days (Fluid)	6,250 psi (43 MPa)
Final Set Time (Fluid)	6 hours (ASTM C191)
Volume Change @ 28 Days	+0.07% (ASTM C1090)
Yield per 50 lb Bag	Approximately 0.46 ft³ (fluid mix)
VOC Content	0 g/L (ASTM D3960)
Shelf Life	12 months (unopened)

Frequently Asked Questions:

Can MasterFlow 555 be used for exterior grouting applications?
Yes, it is suitable for both interior and exterior use due to its non-shrink and corrosion-inhibiting formulation.

What is the recommended temperature range for application?
The ideal application range is 50 to 85 °F. Consult with a technical representative for placements outside this range.

Is the product suitable for heavy machinery grouting?
Yes, MasterFlow 555 is specifically designed for high-strength load transfer and bearing support for machinery and equipment bases.

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