Sika Sikadur 21 Lo-Mod LV 4 Gallon

Sikadur 21 Lo-Mod LV, is a 2-component, 100 % solids, moisture-tolerant, epoxy resin binder. Used as a binder for epoxy mortar for patching and overlays.

Tolerant to moisture both before and after cure
Convenient easy mix ratio A:B = 1:1 by volume
Excellent strength development

$464.93

SKU

18857

Details

Sika Sikadur 21 Lo-Mod LV – Low-Modulus, Low-Viscosity Epoxy Resin Binder

Sika Sikadur 21 Lo-Mod LV is a two-component, 100% solids, moisture-tolerant, low-viscosity epoxy resin binder designed for bonding, patching, and overlays. Engineered for high-strength applications, this low-modulus epoxy provides excellent adhesion, strength development, and resistance to moisture both before and after curing. It conforms to ASTM C-881 Type II, Grade 1, Class B & C and AASHTO M-235 specifications, making it an optimal choice for bonding fresh concrete to hardened concrete, securing injection ports, and as a binder for epoxy mortars.

Key Features:

Low-viscosity epoxy for easy handling and application
Moisture-tolerant both before and after curing
High-strength development with excellent adhesion
1:1 mix ratio for convenient application
Suitable as a primer or binder for epoxy mortars
Conforms to ASTM C-881 and AASHTO M-235 specifications
USDA-certifiable for incidental food contact
Low-modulus formulation reduces stress on bonded substrates

Applications:

Bonding fresh concrete to hardened concrete
Epoxy mortar binder for patching and overlays
Sealing cracks and securing injection ports
Structural adhesive for concrete, steel, and masonry
Priming porous surfaces prior to application of epoxy overlays
Industrial and commercial repair applications

Technical Specifications:

Property	Value
Packaging	4-gallon unit
Color	Clear, amber
Shelf Life	2 years in original, unopened containers
Viscosity	Approximately 1,000 cps
Compressive Strength (ASTM C-579, 28 days)	9,200 psi (63.4 MPa)
Flexural Strength (ASTM D-790, 14 days)	2,300 psi (15.8 MPa)
Tensile Strength (ASTM D-638, 14 days)	5,800 psi (40.0 MPa)
Mixing Ratio	1:1 by volume (Component A + B)

Frequently Asked Questions:

How is Sikadur 21 Lo-Mod LV applied?
Mix equal parts of Component A and Component B, then apply using a brush, roller, or trowel. For epoxy mortar applications, blend with oven-dried sand.

Can this product be used in exterior applications?
Sikadur 21 Lo-Mod LV is not recommended for exterior slabs exposed to direct thermal changes.

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